Neuroscience Chapter: Movement and Action Potentials

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Questions and Answers

What role does the cerebellum play in movement?

  • Regulates loudness detection
  • Controls pain perception
  • Manages neuroprosthetics
  • Ensures movement accuracy (correct)

Which system is primarily responsible for balance and spatial orientation?

  • Cerebellum
  • Somatosensory system
  • Motor cortex
  • Vestibular system (correct)

What is the primary function of the basal ganglia in the context of movement?

  • Detection of auditory cues
  • Processing of visual inputs
  • Control of reflex actions
  • Force control during voluntary movements (correct)

Which part of the brain is crucial for initiating movement?

<p>Motor cortex (D)</p> Signup and view all the answers

Which component is essential for processing pain perception?

<p>Somatosensory cortex (B)</p> Signup and view all the answers

What initiates an action potential in a neuron?

<p>Membrane potential reaching a threshold of around -55 mV (D)</p> Signup and view all the answers

What causes the depolarization phase of an action potential?

<p>Influx of sodium ions through voltage-gated channels (C)</p> Signup and view all the answers

What is the role of the sodium-potassium pump in maintaining resting membrane potential?

<p>It transports K⁺ into the cell while removing Na⁺ (B)</p> Signup and view all the answers

Which phase of an action potential follows the peak?

<p>Repolarization (D)</p> Signup and view all the answers

During the hyperpolarization phase, the membrane potential reaches which approximate value?

<p>-80 mV (D)</p> Signup and view all the answers

What is the primary reason for the negative resting membrane potential of a neuron?

<p>Presence of negatively charged proteins inside the cell (C)</p> Signup and view all the answers

What event occurs at the peak of the action potential?

<p>Sodium channels become inactive (B)</p> Signup and view all the answers

Which statement correctly describes the role of ion channels during rest?

<p>They enable selective movement of ions like K⁺ and Na⁺. (D)</p> Signup and view all the answers

What occurs during the absolute refractory period?

<p>No action potential can occur due to inactivated Na⁺ channels. (A)</p> Signup and view all the answers

What distinguishes saltatory conduction in myelinated axons?

<p>It requires the action potential to jump between nodes of Ranvier. (A)</p> Signup and view all the answers

What role do action potentials play in neurotransmitter release?

<p>They trigger the release of neurotransmitters into the synaptic cleft. (C)</p> Signup and view all the answers

What is the primary function of the refractory period in neurons?

<p>To support the recovery of ion channels after activation. (D)</p> Signup and view all the answers

During which phase is a stronger-than-usual stimulus needed to trigger an action potential?

<p>Relative refractory period. (C)</p> Signup and view all the answers

Which is not a consequence of action potentials?

<p>Inhibiting neurotransmitter release. (D)</p> Signup and view all the answers

How do unmyelinated axons conduct action potentials?

<p>Through a continuous wave-like fashion. (B)</p> Signup and view all the answers

What is the effect of the hyperpolarization of a neuron during the relative refractory period?

<p>The neuron cannot fire until it depolarizes. (B)</p> Signup and view all the answers

What is the main function of the Suprachiasmatic Nucleus (SCN)?

<p>Controlling circadian rhythms (B)</p> Signup and view all the answers

Which sleep stage is characterized by rapid eye movements and is commonly associated with vivid dreaming?

<p>REM Sleep (B)</p> Signup and view all the answers

What is a characteristic of insomnia?

<p>Difficulty initiating or maintaining sleep (B)</p> Signup and view all the answers

Which type of memory is primarily responsible for storing facts and events?

<p>Semantic memory (D)</p> Signup and view all the answers

What is the primary focus of clinical neuroscience?

<p>Diagnosis and treatment of disorders affecting the brain and central nervous system (D)</p> Signup and view all the answers

Which of the following is NOT associated with schizophrenia according to the diagnostic criteria?

<p>Mood disruptions (B)</p> Signup and view all the answers

What role does brain plasticity play in learning?

<p>It enables the brain to adapt to new experiences. (B)</p> Signup and view all the answers

What is a common treatment for mood disorders?

<p>Cognitive-behavioral therapy (CBT) (C)</p> Signup and view all the answers

Which cognitive function is primarily associated with the prefrontal cortex?

<p>Planning and executive functions (C)</p> Signup and view all the answers

What is a common feature of Seasonal Affective Disorder (SAD)?

<p>Mood changes aligned with seasonal light exposure (C)</p> Signup and view all the answers

Which disorder is characterized by alternating periods of depression and mania?

<p>Bipolar disorder (C)</p> Signup and view all the answers

What is a significant brain correlate of schizophrenia?

<p>Enlarged ventricles (B)</p> Signup and view all the answers

Which of the following best describes synesthesia?

<p>The occurrence of one sensory experience triggering another (D)</p> Signup and view all the answers

Which type of disorder includes phobias, panic disorders, and PTSD?

<p>Anxiety disorders (D)</p> Signup and view all the answers

What is a common long-term effect of a stroke?

<p>Cognitive impairments (C)</p> Signup and view all the answers

Which type of seizure is classified as focal?

<p>Seizures that originate in a specific area of the brain (A)</p> Signup and view all the answers

What is the concordance rate for schizophrenia in identical twins?

<p>80% (C)</p> Signup and view all the answers

What is a treatment option specifically for Multiple Sclerosis?

<p>Neuroprotectants (D)</p> Signup and view all the answers

What commonly causes traumatic brain injury (TBI) in individuals under 40?

<p>Blows to the head (A)</p> Signup and view all the answers

Which of the following is a characteristic of Alzheimer's Disease?

<p>Formation of neurofibrillary tangles (B)</p> Signup and view all the answers

What is one potential cause of Multiple Sclerosis?

<p>Vitamin D deficiency (A)</p> Signup and view all the answers

What is a primary treatment for severe depression?

<p>Electroconvulsive Therapy (ECT) (D)</p> Signup and view all the answers

Which condition is treated with L-Dopa?

<p>Parkinson's Disease (C)</p> Signup and view all the answers

What does Deep Brain Stimulation (DBS) primarily use to treat?

<p>Severe depression and OCD (B)</p> Signup and view all the answers

Which structure is primarily responsible for refining movement accuracy?

<p>Cerebellum (D)</p> Signup and view all the answers

Which system plays a key role in controlling balance and spatial orientation?

<p>Vestibular System (C)</p> Signup and view all the answers

What is the primary function of the spinal cord in relation to movement?

<p>Facilitating reflex actions (A)</p> Signup and view all the answers

Which area of the brain is primarily involved in the planning and execution of voluntary movements?

<p>Motor Cortex (C)</p> Signup and view all the answers

Which system is primarily associated with interpreting and responding to sensory stimuli?

<p>Somatosensory System (C)</p> Signup and view all the answers

What is a common treatment for anxiety disorders?

<p>Cognitive-behavioral therapy (B)</p> Signup and view all the answers

Which of the following symptoms is a primary indicator of Major Depression?

<p>Worthlessness (D)</p> Signup and view all the answers

What is a known genetic factor linked to schizophrenia?

<p>Linked to ~300 mutations on 10 genes (D)</p> Signup and view all the answers

Which factor is NOT a known cause of neurological disorders?

<p>Viruses in childhood (B)</p> Signup and view all the answers

What treatment is commonly used in managing mood disorders?

<p>SSRIs (B)</p> Signup and view all the answers

What are the brain correlates typically associated with schizophrenia?

<p>Enlarged ventricles and thinner cortical regions (C)</p> Signup and view all the answers

What is a significant developmental factor linked to schizophrenia?

<p>Excessive pruning of cortical connections (C)</p> Signup and view all the answers

What is the main characteristic of REM sleep?

<p>It is characterized by muscle paralysis and dreaming. (B), It is associated with increased heart rate and breathing. (D)</p> Signup and view all the answers

Which of the following descriptions best fits traumatic brain injury (TBI)?

<p>Symptoms primarily include disorientation and confusion (D)</p> Signup and view all the answers

What is the typical membrane potential of a neuron at rest?

<p>-70 mV (C)</p> Signup and view all the answers

How does Seasonal Affective Disorder (SAD) primarily affect individuals?

<p>It is mainly triggered by changes in light exposure during winter. (B)</p> Signup and view all the answers

Which ion primarily causes depolarization during an action potential?

<p>Sodium (Na⁺) (A)</p> Signup and view all the answers

What role does the Suprachiasmatic Nucleus (SCN) play in the body?

<p>It serves as the primary biological clock controlling circadian rhythms. (D)</p> Signup and view all the answers

What event occurs during the repolarization phase of an action potential?

<p>K⁺ ions exit the neuron (D)</p> Signup and view all the answers

Which type of sleep disorder involves episodes of suddenly falling asleep during the day?

<p>Narcolepsy (B)</p> Signup and view all the answers

When does hyperpolarization occur during an action potential?

<p>After the peak of the action potential (D)</p> Signup and view all the answers

What is the primary function of neural circuits involved in memory?

<p>To store and retrieve information. (C)</p> Signup and view all the answers

What is the role of the sodium-potassium pump at rest?

<p>To create a net negative charge inside the neuron (C)</p> Signup and view all the answers

Which concept best describes the brain's ability to adapt and reorganize itself?

<p>Neuroplasticity (C)</p> Signup and view all the answers

What must happen for an action potential to be initiated?

<p>Membrane potential must reach a threshold of -55 mV (D)</p> Signup and view all the answers

In disorders like insomnia, which of the following symptoms is most commonly experienced?

<p>Difficulty in staying asleep (A), Waking up too early without returning to sleep (B)</p> Signup and view all the answers

What is one of the characteristics of lucid dreaming?

<p>Conscious awareness during the dream. (A)</p> Signup and view all the answers

Which of the following describes the peak of an action potential?

<p>Membrane potential reaches +30 mV and Na⁺ channels inactivate (A)</p> Signup and view all the answers

Which factor contributes to the negative resting membrane potential of a neuron?

<p>Negatively charged proteins inside the cell (A)</p> Signup and view all the answers

What type of stroke is characterized by a blockage obstructing blood flow to the brain?

<p>Ischemic (D)</p> Signup and view all the answers

Which of the following is a common treatment for epilepsy?

<p>Fast-acting GABA agonists (C)</p> Signup and view all the answers

What is a major pathological feature of Alzheimer's Disease?

<p>Neurofibrillary tangles (B)</p> Signup and view all the answers

Which treatment is specifically designed to induce neurogenesis?

<p>Stem Cell Therapy (D)</p> Signup and view all the answers

What is a potential consequence of untreated stroke?

<p>Cognitive impairments (B)</p> Signup and view all the answers

Which substance is generally used to treat Parkinson's disease?

<p>L-Dopa (A)</p> Signup and view all the answers

What is the primary function of transcranial magnetic stimulation (TMS)?

<p>To treat depression and anxiety disorders (B)</p> Signup and view all the answers

What condition is characterized by an autoimmune response leading to the destruction of myelin in the nervous system?

<p>Multiple Sclerosis (C)</p> Signup and view all the answers

What occurs during the absolute refractory period of a neuron?

<p>Sodium channels are inactivated, preventing any action potential. (A)</p> Signup and view all the answers

How do action potentials facilitate communication between neurons?

<p>By stimulating the release of neurotransmitters at the axon terminal. (A)</p> Signup and view all the answers

What distinguishes the process of saltatory conduction in myelinated axons?

<p>The impulse jumps between gaps in the myelin sheath. (C)</p> Signup and view all the answers

What is a necessary condition for generating a new action potential during the relative refractory period?

<p>A stronger-than-normal stimulus. (D)</p> Signup and view all the answers

What characterizes the propagation of action potentials in unmyelinated axons?

<p>The impulse moves in a wave-like fashion along the membrane. (C)</p> Signup and view all the answers

Which statement accurately describes the effects of neurotransmitter release triggered by an action potential?

<p>It allows for communication with other neurons at the synapse. (C)</p> Signup and view all the answers

What consequence does hyperpolarization during the relative refractory period have on neuronal firing?

<p>It requires a stronger stimulus to trigger another action potential. (A)</p> Signup and view all the answers

What role does sodium play in the generation of action potentials?

<p>Sodium channels open, leading to depolarization of the neuron. (A)</p> Signup and view all the answers

Which mechanism contributes to the maintenance of a negative resting membrane potential?

<p>Efflux of potassium ions (D)</p> Signup and view all the answers

What occurs during the repolarization phase of an action potential?

<p>Potassium ions flow out of the neuron (A)</p> Signup and view all the answers

During which phase of an action potential does the membrane potential briefly become more negative than the resting potential?

<p>Hyperpolarization (C)</p> Signup and view all the answers

What is the primary role of the sodium-potassium pump in neurons?

<p>To actively transport sodium out and potassium into the cell (D)</p> Signup and view all the answers

Which event is associated with the peak of the action potential?

<p>Inactivation of sodium channels and opening of potassium channels (C)</p> Signup and view all the answers

Which stimulus is most likely to trigger the initiation of an action potential?

<p>A strong sensory stimulus like pressure or light (B)</p> Signup and view all the answers

What is the approximate resting membrane potential of a typical neuron?

<p>-70 mV (B)</p> Signup and view all the answers

What characterizes the absolute refractory period in a neuron?

<p>No action potential can occur. (B)</p> Signup and view all the answers

What is the primary difference in how action potentials propagate in myelinated versus unmyelinated axons?

<p>Myelinated axons jump between nodes of Ranvier. (A)</p> Signup and view all the answers

What stimulus is required during the relative refractory period to trigger another action potential?

<p>A stronger-than-usual stimulus. (A)</p> Signup and view all the answers

Which role does action potential play in communication between neurons?

<p>It leads to neurotransmitter release. (B)</p> Signup and view all the answers

Which statement correctly reflects the benefit of saltatory conduction in neurons?

<p>It accelerates the transmission of signals. (C)</p> Signup and view all the answers

What occurs at the axon terminal as a result of an action potential?

<p>Release of neurotransmitters. (B)</p> Signup and view all the answers

What is a consequence of the hyperpolarization of a neuron?

<p>Reduced excitability for a short period. (D)</p> Signup and view all the answers

Which process is responsible for the rapid transmission of action potentials in myelinated axons?

<p>Saltatory conduction. (B)</p> Signup and view all the answers

Which factor is most associated with the development of schizophrenia?

<p>Excessive pruning of cortical connections (C), Genetic mutations on 10 genes (D)</p> Signup and view all the answers

What is a common symptom experienced in major depression?

<p>Suicidal ideation (D)</p> Signup and view all the answers

What distinguishes acute anxiety disorders from chronic types?

<p>Duration of the symptoms (C)</p> Signup and view all the answers

Which treatment is commonly used for anxiety disorders?

<p>SSRIs (B), Cognitive-behavioral therapy (CBT) only (D)</p> Signup and view all the answers

What is a key characteristic of traumatic brain injury (TBI) symptoms?

<p>Amnesia and confusion (C)</p> Signup and view all the answers

What role do dopamine abnormalities play in psychiatric disorders?

<p>They contribute to the symptoms of schizophrenia (B)</p> Signup and view all the answers

Which characteristic is commonly associated with mood disorders such as bipolar disorder?

<p>Alternating periods of depression and mania (C)</p> Signup and view all the answers

Which factor could contribute to anxiety disorders in relation to environmental influences?

<p>Chronic exposure to stress (A), Epigenetic mechanisms (C)</p> Signup and view all the answers

What role does the cerebellum play in movement accuracy?

<p>It fine-tunes motor activity to improve precision. (D)</p> Signup and view all the answers

Which component of the auditory system is primarily responsible for processing language and music?

<p>Auditory cortex. (D)</p> Signup and view all the answers

Which system integrates and responds to sensory information related to balance?

<p>Vestibular system. (B)</p> Signup and view all the answers

What is the primary function of the basal ganglia in motor control?

<p>To regulate the intensity and force of movements. (B)</p> Signup and view all the answers

Which part of the nervous system is responsible for mediating reflex actions?

<p>Spinal cord. (C)</p> Signup and view all the answers

Which type of stroke is characterized by bleeding in the brain?

<p>Hemorrhagic (D)</p> Signup and view all the answers

What is a common treatment approach for epilepsy characterized by localized seizures?

<p>Surgical resection (A)</p> Signup and view all the answers

What treatment option for neurological disorders aims to stimulate neurogenesis?

<p>Stem Cell Therapy (A)</p> Signup and view all the answers

Which of the following is a hallmark of Alzheimer’s Disease?

<p>Neurofibrillary tangles (B)</p> Signup and view all the answers

Which condition is associated with a significant decrease in sensory perception and executive function with age?

<p>Age-Related Cognitive Loss (A)</p> Signup and view all the answers

Which pharmacological treatment is primarily used for managing Parkinson's disease?

<p>L-Dopa (D)</p> Signup and view all the answers

What is a significant risk associated with Electroconvulsive Therapy (ECT)?

<p>Memory loss (B)</p> Signup and view all the answers

Which type of substance is often seen with neurodegenerative disorders, including Alzheimer's Disease?

<p>Amyloid plaques (B)</p> Signup and view all the answers

Which component is primarily involved in regulating circadian rhythms?

<p>Suprachiasmatic Nucleus (SCN) (D)</p> Signup and view all the answers

What characterizes REM sleep?

<p>Rapid eye movements and vivid dreams (B)</p> Signup and view all the answers

Which type of sleep disorder involves excessive daytime sleepiness?

<p>Hypersomnias (C)</p> Signup and view all the answers

What is primarily responsible for the consolidation of long-term memories?

<p>Hippocampal formation (A)</p> Signup and view all the answers

Which aspect of cognition is primarily associated with the frontal lobes?

<p>Executive function and planning (B)</p> Signup and view all the answers

What type of memory is generally considered short-term and limited in capacity?

<p>Working memory (B)</p> Signup and view all the answers

Which physiological system is involved in regulating emotional memory?

<p>Limbic system (D)</p> Signup and view all the answers

What condition is primarily linked with reduced exposure to natural light during specific seasons?

<p>Seasonal Affective Disorder (SAD) (C)</p> Signup and view all the answers

What is a primary role of the cerebellum in relation to movements?

<p>Enhancing movement accuracy (B)</p> Signup and view all the answers

Which system is primarily responsible for spatial awareness and balance?

<p>Vestibular system (A)</p> Signup and view all the answers

Which part of the brain is primarily involved in higher-level coordination of skilled movements?

<p>Motor cortex (D)</p> Signup and view all the answers

Pain perception is primarily processed in which part of the nervous system?

<p>Somatosensory cortex (C)</p> Signup and view all the answers

What occurs when the membrane potential of a neuron reaches around -55 mV?

<p>An action potential is initiated. (D)</p> Signup and view all the answers

During which phase of the action potential do sodium channels inactivate?

<p>Peak (C)</p> Signup and view all the answers

What primarily maintains the resting negative charge inside a neuron?

<p>Negatively charged proteins inside the cell (D)</p> Signup and view all the answers

What happens during the hyperpolarization phase of an action potential?

<p>The membrane potential becomes more negative than resting potential. (B)</p> Signup and view all the answers

Which mechanism is responsible for establishing the resting membrane potential?

<p>Sodium-potassium pump activity (D)</p> Signup and view all the answers

Which of the following ions is primarily responsible for the depolarization during an action potential?

<p>Sodium (Na⁺) (A)</p> Signup and view all the answers

Which of the following events occurs during repolarization?

<p>K⁺ ions flow out of the neuron. (A)</p> Signup and view all the answers

What role do ion channels play when a neuron is at rest?

<p>K⁺ ions can leak out while Na⁺ ions remain outside. (D)</p> Signup and view all the answers

Which component is primarily responsible for regulating circadian rhythms in the body?

<p>Suprachiasmatic Nucleus (SCN) (B)</p> Signup and view all the answers

What stage of sleep is primarily associated with vivid dreaming?

<p>REM Sleep (A)</p> Signup and view all the answers

Which disorder is characterized by excessive sleepiness during the day and can significantly impact daily functioning?

<p>Narcolepsy (A)</p> Signup and view all the answers

What type of memory is primarily involved in recalling how to perform tasks, such as riding a bicycle?

<p>Procedural Memory (B)</p> Signup and view all the answers

What are the common symptoms of schizophrenia as defined by the DSM?

<p>Delusions, hallucinations, and disorganized speech (B)</p> Signup and view all the answers

Which neural structure plays a crucial role in emotional regulation and memory formation?

<p>Amygdala (C)</p> Signup and view all the answers

What is the primary neurochemical abnormality linked to schizophrenia?

<p>Dopamine abnormalities (B)</p> Signup and view all the answers

Which cognitive function is primarily associated with the ability to plan and organize actions towards achieving goals?

<p>Executive Functioning (B)</p> Signup and view all the answers

Which condition is characterized by alternating periods of depression and mania?

<p>Bipolar Disorder (C)</p> Signup and view all the answers

What term describes the condition when individuals experience a disorder characterized by the perception of non-existent stimuli, such as seeing colors with numbers?

<p>Synesthesia (A)</p> Signup and view all the answers

Which aspect of brain function is primarily responsible for the integration of sensory information and higher order cognitive processes?

<p>Association Cortex (D)</p> Signup and view all the answers

What is a common treatment option for anxiety disorders?

<p>SSRIs and cognitive-behavioral therapy (A)</p> Signup and view all the answers

What are common causes of traumatic brain injury (TBI) in individuals under 40?

<p>Blows to the head and accidents (A)</p> Signup and view all the answers

Which disorder is linked to prenatal origins and excessive pruning of cortical connections?

<p>Schizophrenia (B)</p> Signup and view all the answers

What treatment is commonly used for severe depression?

<p>SSRIs and neurogenesis-focused interventions (B)</p> Signup and view all the answers

What are the potential long-term effects of a stroke?

<p>Cognitive impairments and personality changes (A)</p> Signup and view all the answers

Which type of seizure is characterized by localized brain activity?

<p>Simple focal seizures (D)</p> Signup and view all the answers

What is a common autoimmune disease that leads to myelin loss?

<p>Multiple sclerosis (C)</p> Signup and view all the answers

What characterizes amyloid plaques in Alzheimer's Disease?

<p>Protein deposits in the brain (C)</p> Signup and view all the answers

Which factor is a known predisposing factor for Alzheimer's Disease?

<p>Genetics and environmental toxins (D)</p> Signup and view all the answers

What is the primary function of GABA agonists in epilepsy treatment?

<p>Inhibit excessive neuronal firing (B)</p> Signup and view all the answers

Which treatment option focuses on inducing neurogenesis?

<p>Stem Cell Therapy (A)</p> Signup and view all the answers

What is the effect of the relative refractory period on neuron firing?

<p>A stronger-than-normal stimulus is required to trigger action potentials. (B)</p> Signup and view all the answers

How does saltatory conduction enhance the propagation of action potentials in myelinated axons?

<p>It causes the impulse to jump between nodes of Ranvier, speeding up transmission. (A)</p> Signup and view all the answers

What is the primary role of action potentials in the nervous system?

<p>They cause the release of neurotransmitters at axon terminals. (A)</p> Signup and view all the answers

Which statement accurately describes unmyelinated axon conduction?

<p>The impulse travels in a directional manner through continuous conduction. (C)</p> Signup and view all the answers

What initiates the release of neurotransmitters at the axon terminal?

<p>An action potential arriving at the axon terminal. (A)</p> Signup and view all the answers

What is a characteristic feature of action potentials in neurons?

<p>They propagate without losing strength along the axon. (D)</p> Signup and view all the answers

What happens to the neuron during the hyperpolarization phase?

<p>The neuron requires a stronger-than-normal stimulus to fire. (A)</p> Signup and view all the answers

What role does the cerebellum play in movement coordination?

<p>It regulates balance and motor learning. (B)</p> Signup and view all the answers

How does the somatosensory system contribute to movement?

<p>By processing proprioceptive information about body position. (B)</p> Signup and view all the answers

What is one key function of the basal ganglia in movement control?

<p>It facilitates the initiation and regulation of movements. (B)</p> Signup and view all the answers

Why is the spinal cord important for reflexes?

<p>It serves as a direct pathway for reflex actions without brain involvement. (C)</p> Signup and view all the answers

Which aspect of auditory processing is primarily associated with the brain's ability to differentiate loudness and location of sounds?

<p>The pathway for sound localization and intensity tracking. (A)</p> Signup and view all the answers

What is the typical resting membrane potential of a neuron?

<p>-70 mV (A)</p> Signup and view all the answers

What initiates an action potential when a neuron receives a stimulus?

<p>-55.5 (B)</p> Signup and view all the answers

During which phase of an action potential do voltage-gated sodium channels open?

<p>Depolarization (C)</p> Signup and view all the answers

What happens to the membrane potential during hyperpolarization?

<p>It briefly becomes more negative than the resting potential (B)</p> Signup and view all the answers

What is the primary mechanism that maintains the resting membrane potential of a neuron?

<p>Sodium-potassium pump activity (A)</p> Signup and view all the answers

What role do negatively charged proteins play in resting membrane potential?

<p>They contribute to the negative charge inside the cell (D)</p> Signup and view all the answers

Which of the following is a common treatment for major depression?

<p>Cognitive-behavioral therapy (CBT) (D)</p> Signup and view all the answers

What genetic factor is associated with schizophrenia?

<p>Over 300 mutations found on 10 genes (C)</p> Signup and view all the answers

What is a primary cause of traumatic brain injury (TBI) in young adults?

<p>Blows to the head (B)</p> Signup and view all the answers

What is a major characteristic of bipolar disorder?

<p>Alternating episodes of depression and mania (D)</p> Signup and view all the answers

Which psychiatric disorder is characterized by symptoms such as worthlessness and suicidal ideation?

<p>Major Depression (D)</p> Signup and view all the answers

Which of the following statements is true regarding anxiety disorders?

<p>They can be treated effectively with SSRIs and CBT. (C)</p> Signup and view all the answers

What developmental factor is associated with schizophrenia?

<p>Prenatal origins indicating early developmental issues (D)</p> Signup and view all the answers

Which sleep stage is most associated with vivid dreaming?

<p>REM Sleep (A)</p> Signup and view all the answers

What is a common characteristic of insomnia?

<p>Difficulty falling or staying asleep (B)</p> Signup and view all the answers

Which type of memory is primarily responsible for the recall of skills and procedures?

<p>Procedural Memory (D)</p> Signup and view all the answers

What best defines 'lucid dreaming'?

<p>Dreaming where one is aware they are dreaming (D)</p> Signup and view all the answers

Which disorder includes symptoms such as prolonged periods of excessive sleepiness?

<p>Narcolepsy (A)</p> Signup and view all the answers

What aspect of neuroeconomics primarily examines?

<p>The decision-making processes and their neural origins (C)</p> Signup and view all the answers

Which condition is commonly associated with disruptions in circadian rhythms and can lead to mood changes?

<p>Seasonal Affective Disorder (SAD) (D)</p> Signup and view all the answers

What is a potential long-term effect of a stroke?

<p>Cognitive impairments (B)</p> Signup and view all the answers

Which type of stroke results from a blockage in blood vessels?

<p>Ischemic stroke (A)</p> Signup and view all the answers

What classification best describes generalized seizures?

<p>Seizures that rapidly spread across both hemispheres (B)</p> Signup and view all the answers

Which of the following is an autoimmune disease associated with myelin loss?

<p>Multiple Sclerosis (B)</p> Signup and view all the answers

What are amyloid plaques and neurofibrillary tangles associated with?

<p>Alzheimer's Disease (B)</p> Signup and view all the answers

Which treatment is commonly used for severe depression and has memory loss as a risk?

<p>Electroconvulsive Therapy (ECT) (D)</p> Signup and view all the answers

Which substance is commonly used to treat Parkinson's Disease?

<p>L-Dopa (C)</p> Signup and view all the answers

What is a significant challenge associated with pharmacological treatments for neurological disorders?

<p>Severe side effects (B)</p> Signup and view all the answers

What happens during the absolute refractory period of a neuron?

<p>No action potential can occur because Na⁺ channels are inactivated. (D)</p> Signup and view all the answers

What characterizes the relative refractory period?

<p>A stronger-than-usual stimulus is needed to trigger another action potential. (B)</p> Signup and view all the answers

How does saltatory conduction differ from conduction in unmyelinated axons?

<p>Impulse jumps between nodes of Ranvier. (D)</p> Signup and view all the answers

What is a primary function of action potentials in neurons?

<p>They trigger the release of neurotransmitters at the axon terminal. (A)</p> Signup and view all the answers

In what way does an impulse travel along myelinated axons?

<p>By jumping between gaps in the myelin sheath. (B)</p> Signup and view all the answers

What effect does hyperpolarization have during the relative refractory period?

<p>It makes it difficult for the neuron to fire again without a stronger stimulus. (C)</p> Signup and view all the answers

Which statement correctly reflects the propagation of action potentials in unmyelinated axons?

<p>It travels without losing strength. (C)</p> Signup and view all the answers

What is one consequence of action potentials for muscle neurons?

<p>They trigger the release of neurotransmitters leading to muscle activation. (D)</p> Signup and view all the answers

Flashcards

Action Potential

A rapid and temporary electrical signal that travels along the axon of a neuron, enabling communication with other neurons, muscles, or glands.

Resting Membrane Potential

The difference in electrical charge between the inside and outside of a neuron at rest, typically around -70 millivolts (mV).

Sodium-Potassium Pump

A protein that pumps ions across the cell membrane, specifically moving 3 sodium ions (Na⁺) out for every 2 potassium ions (K⁺) in.

Ion Channels

Pores in the cell membrane that allow specific ions (e.g., sodium, potassium) to pass through.

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Threshold Potential

The minimum level of membrane depolarization needed to trigger an action potential, usually around -55 mV.

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Depolarization

The phase where the membrane potential becomes more positive due to sodium ions rushing into the cell, making the inside more positive.

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Repolarization

The phase where the membrane potential returns to its resting negative state due to potassium ions flowing out of the cell.

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Hyperpolarization

A brief period after repolarization where the membrane potential becomes even more negative than the resting potential, due to potassium channels closing slowly.

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Absolute Refractory Period

The period after an action potential during which the neuron cannot fire another action potential, regardless of the strength of the stimulus.

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Relative Refractory Period

The period after an action potential during which the neuron can fire another action potential, but only if a stronger-than-usual stimulus is applied.

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Propagation of Action Potential

The mechanism by which action potentials travel along the axon without losing strength.

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Saltatory Conduction

The process of signal transmission in myelinated axons where the action potential jumps between the gaps in the myelin sheath, called nodes of Ranvier. This increases the speed of transmission.

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Communication

The primary function of action potentials is to transmit information over long distances in the nervous system.

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Neurotransmitter Release

At the axon terminal, the arrival of an action potential triggers the release of neurotransmitters into the synaptic cleft, enabling communication between neurons.

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Muscle Activation

In motor neurons, action potentials cause the release of acetylcholine at the neuromuscular junction, leading to muscle contraction.

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Visual Pathway

The visual pathway refers to the series of neurons that process visual information from the eyes to the brain.

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Echolocation

A biological sonar system used by bats, dolphins, and some other animals to locate prey and navigate in the dark through sound waves.

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Hearing Pitch

The perception of the frequency of sound; the higher the frequency, the higher the pitch.

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Detecting Loudness and Location

The brain integrates information from both ears to determine the location of a sound source.

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Language in the Brain

The part of the brain responsible for language processing is located in the left hemisphere for most people.

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Music in the Brain

The part of the brain responsible for music processing is located in both hemispheres.

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Ischemic Stroke

A type of stroke caused by a blockage in a blood vessel, preventing blood flow to the brain.

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Hemorrhagic Stroke

A type of stroke caused by a ruptured blood vessel in the brain, leading to bleeding.

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Epilepsy

A neurological disorder characterized by recurring seizures, due to abnormal electrical activity in the brain.

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Focal Seizure

A type of seizure that stays localized to a specific area of the brain.

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Generalized Seizure

A type of seizure that spreads quickly to both hemispheres of the brain.

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Alzheimer's Disease (AD)

A neurodegenerative disease characterized by a progressive decline in cognitive functions, due to neuronal damage.

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Deep Brain Stimulation (DBS)

A treatment for Parkinson's Disease and other movement disorders involving implanted electrodes in the brain, stimulating specific areas to regulate brain activity.

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Transcranial Magnetic Stimulation (TMS)

A type of therapy for depression and other mental health conditions that uses magnetic pulses to stimulate specific areas of the brain.

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Bálint Syndrome

A condition characterized by a disruption in the ability to perceive and interact with the world around them despite intact sensory systems.

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Dissociation Between Motor Behavior and Conscious Awareness

Refers to situations where a person can perform a motor task, such as reaching for an object, without having conscious awareness of the action or its goal.

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Lucid Dreaming

A state of being aware of oneself and the surrounding environment while dreaming. It involves the ability to control dream content and actions.

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Schizophrenia

A complex neuropsychiatric disorder that manifests in a wide range of symptoms, including delusions, hallucinations, disorganized speech, and negative symptoms.

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Mood Disorders

A group of disorders characterized by extreme fluctuations in mood, ranging from periods of intense elation and energy (mania) to profound sadness and hopelessness (depression).

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Anxiety Disorders

A category of mental health conditions marked by persistent and excessive anxiety or fear, often accompanied by physical symptoms and behavioral changes.

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Traumatic Brain Injury (TBI)

A type of brain injury resulting from a sudden blow or jolt to the head, or a penetrating head injury. It can range in severity from mild to severe, with varying symptoms.

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Clinical Neuroscience

A specialized field in neuroscience that focuses on the diagnosis and treatment of diseases and disorders affecting the brain and central nervous system.

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Circadian Rhythms

Circadian rhythms are biological cycles that occur approximately every 24 hours and are influenced by environmental cues, primarily light.

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Suprachiasmatic Nucleus (SCN)

The suprachiasmatic nucleus (SCN) is a small region in the hypothalamus of the brain that acts as the master clock for circadian rhythms. It receives light information from the retina and regulates the timing of various physiological processes.

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NREM Sleep

Non-Rapid Eye Movement (NREM) sleep is characterized by slow, deep breathing and reduced heart rate. It is divided into three stages: Stage 1 (light sleep), Stage 2 (deeper sleep), and Stage 3 (deepest sleep).

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REM Sleep

Rapid Eye Movement (REM) sleep is characterized by rapid eye movements, increased brain activity, and dreaming. It is also known as "paradoxical sleep" because the brain is very active while the body is relaxed and paralyzed.

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Dreaming

Dreaming is a state of consciousness during sleep that involves vivid sensory experiences and often illogical or bizarre scenarios. It is most common during REM sleep.

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Insomnia

Insomnia refers to difficulty initiating or maintaining sleep, or both. It can lead to daytime fatigue and impairment.

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Brain Plasticity

Brain plasticity refers to the brain's ability to change and adapt in response to experience. This includes changes in neural connections, the formation of new synapses, and the restructuring of brain regions.

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Attention

Attention is a cognitive process that allows us to focus on certain stimuli and ignore others. It is essential for learning, memory, and decision-making.

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Propagation of the Action Potential

The way an action potential travels down the axon without losing strength, like a domino effect, but with electricity.

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Physical Dimensions of Sound Waves

The physical dimensions of sound waves, including frequency (pitch), amplitude (loudness), and complexity (timbre).

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Tinnitus

A ringing or buzzing sound in the ears that is not caused by an external source, often caused by damage to the auditory system.

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Transducing Sound to Neural Impulses

The process by which the ear converts sound waves into electrical signals that the brain can interpret.

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What is the Suprachiasmatic Nucleus (SCN)?

A biological clock, often called the 'master clock', located in the hypothalamus of the brain. It regulates the timing of various physiological processes, including sleep-wake cycles.

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What is Brain Plasticity?

The brain's ability to change and adapt in response to experiences, including learning, trauma, and development. This includes changes in neuronal connections, the formation of new synapses, and the restructuring of brain regions.

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What is Dreaming?

A state of consciousness during sleep that involves vivid sensory experiences and often illogical or bizarre scenarios. It is most common during REM sleep.

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What is Insomnia?

Difficulty initiating or maintaining sleep, or both. It can lead to daytime fatigue and impairment.

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What is Episodic Memory?

A type of memory that includes our personal experiences and events that are temporally and spatially tagged, allowing us to relive those events in our minds.

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What is Clinical Neuroscience?

The specialized field of neuroscience that applies neuroscience discoveries and principles to clinical problems, including the diagnosis, treatment, and prevention of neurological and psychiatric disorders.

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What is Mood Disorder?

A disorder characterized by a persistent mood disturbance that manifests as either prolonged periods of sadness and hopelessness (depression) or a sustained period of abnormally elevated mood and energy (mania).

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What is Attention?

The ability to focus on certain stimuli and ignore others. It is essential for learning, memory, and decision-making.

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Frequency in Sound

The physical property of sound waves that determines the perceived pitch. Higher frequency means higher pitch.

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Amplitude in Sound

The physical property of sound waves that determines perceived loudness. Greater amplitude means louder sound.

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Sound Transduction

The process by which the ear converts sound waves into electrical signals that the brain can interpret.

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What is the resting membrane potential?

The difference in electrical charge across the neuronal membrane at rest, typically around -70 millivolts (mV). It is maintained by the sodium-potassium pump, ion channels, and negatively charged proteins within the cell.

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What is an action potential?

A rapid and temporary electrical signal that travels along the axon of a neuron, allowing it to communicate with other neurons, muscles, or glands. It involves a transient change in the electrical charge across the neuronal membrane, shifting from a resting negative state to a positive state and back to negative.

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What is threshold potential?

The minimum level of membrane depolarization needed to trigger an action potential, typically around -55 mV. It's like flipping a switch to start the action potential.

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What is depolarization?

The phase of an action potential where the membrane potential becomes more positive due to sodium ions rushing into the cell, making the inside more positive.

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What is repolarization?

The phase of an action potential where the membrane potential returns to its resting negative state due to potassium ions flowing out of the cell, restoring the negative charge inside.

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What is hyperpolarization?

A brief period after repolarization where the membrane potential becomes even more negative than the resting potential, due to potassium channels closing slowly.

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What is the Sodium-Potassium Pump?

A protein that pumps ions across the cell membrane, specifically moving 3 sodium ions (Na⁺) out for every 2 potassium ions (K⁺) in. It contributes to maintaining the resting membrane potential.

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What are ion channels?

Pores in the cell membrane that allow specific ions (e.g., sodium, potassium) to pass through. They play a crucial role in action potential generation and transmission.

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What is echolocation?

Echolocation is a biological sonar system used by animals like bats and dolphins to navigate and locate objects in their environment by emitting sound waves and interpreting the echoes that return.

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What is hearing pitch?

The perception of the frequency of sound waves; a higher frequency results in a higher pitch.

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How do we detect sound location?

Our auditory system determines the location of a sound source by integrating information from both ears. This process uses differences in the intensity and timing of sound waves reaching each ear.

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Where are language and music processed in the brain?

The language processing area in the brain is primarily located in the left hemisphere for most people; while music processing involves both hemispheres.

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How do nonhuman animals communicate using sound?

Nonhuman animals often use sound to communicate, such as birdsong for mating rituals or dolphin clicks for navigation. These signals can be complex and vary depending on the species and context.

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Multisensory Integration

The process by which the brain integrates information from multiple senses, creating a unified perception of the world. This allows us to perceive a complete picture, not just separate sensory inputs.

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Executive Function

The set of cognitive functions that control our actions, planning, decision-making, and goal-directed behavior. It allows us to stay focused on tasks, adapt to new challenges, and achieve our desired outcomes.

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Spatial Cognition

The ability of the brain to perceive and understand spatial relationships, including where things are located, how far away they are, and how to navigate through space. It's essential for navigation, object recognition, and even understanding language.

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Alzheimer's Disease

A major cause of cognitive decline, characterized by the formation of amyloid plaques and neurofibrillary tangles, leading to neuronal damage.

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Parkinson's Disease

A neurodegenerative disorder affecting primarily the motor system, characterized by tremor, rigidity, and slow movement caused by dopamine deficiency in the brain.

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Behavioral Treatments

Treatments aimed at changing behavior patterns to manage conditions like depression, anxiety, and post-stroke rehabilitation.

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What is sound transduction?

The process by which the ear converts sound waves into electrical signals that the brain can interpret.

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What is Parkinson's Disease?

A neurological disorder affecting primarily the motor system, characterized by tremor, rigidity, and slow movement caused by dopamine deficiency in the brain.

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What is Multisensory Integration?

The ability of the brain to integrate information from multiple senses, creating a unified perception of the world.

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What are Behavioral Treatments?

Treatments that focus on changing behavior patterns to manage conditions like depression, anxiety, and post-stroke rehabilitation.

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What is resting membrane potential?

The difference in electrical charge between the inside and outside of a neuron at rest, typically around -70 millivolts (mV).

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Biological Rhythms

Biological rhythms are cyclical changes in biological activity that occur in regular, predictable patterns. These rhythms are often influenced by internal and external factors, such as hormones, light, and temperature.

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Sleep Stages

Sleep stages are distinct patterns of brain activity and physiological changes that occur during sleep. These stages are characterized by different brain wave patterns, muscle activity, and eye movements.

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NREM Sleep (N-sleep)

Non-rapid eye movement (NREM) sleep, also known as N-sleep, is characterized by slow, deep breathing, reduced heart rate, and decreased muscle activity. It is divided into three stages: Stage 1 (light sleep), Stage 2 (deeper sleep), and Stage 3 (deepest sleep).

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REM Sleep (R-sleep)

Rapid eye movement (REM) sleep, also known as R-sleep, is a stage of sleep characterized by rapid eye movements, increased brain activity, and dreaming. It is also known as "paradoxical sleep." Because the brain is very active while the body is relaxed and paralyzed.

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Hypersomnias

Hypersomnias are a category of sleep disorders characterized by excessive sleepiness, often resulting in daytime sleepiness, falling asleep unexpectedly, or prolonged sleep times.

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Study Notes

Action Potential

  • A rapid, temporary electrical signal traveling along an axon.
  • Allows communication between neurons, muscles, or glands.
  • Involves a transient change in electrical charge across the neuronal membrane.
  • Shifts from a resting negative state (inside the neuron) to a positive state, then back to negative.

Resting Membrane Potential

  • Inside of a neuron has a negative charge (-70 mV) relative to the outside.
  • Maintained by the sodium-potassium pump and ion channels.
  • Sodium-potassium pump actively transports 3 Na+ ions out and 2 K+ ions in, creating a net negative charge inside.
  • Ion channels allow selective movement of ions (K+ and Na+).
  • Negatively charged proteins inside the neuron contribute to the negative charge.

Triggering an Action Potential

  • Initiated when the membrane potential reaches a threshold (-55 mV).
  • This membrane potential change is due to stimuli such as signals from other neurons or sensory stimuli (e.g., pressure, light).

Phases of an Action Potential

  • Depolarization:
    • Voltage-gated sodium channels open, allowing Na+ ions to flood into the cell.
    • Influx of Na+ makes the inside of the cell more positive (+30 mV), sharply rising.
  • Peak: The maximum membrane potential.
  • Repolarization:
    • Voltage-gated sodium channels inactivate (close).
    • Potassium (K+) ions flow out of the neuron through open potassium channels.
    • Outflow restores negative charge to the inside of the cell.
  • Hyperpolarization:
    • Potassium channels close slowly.
    • Membrane potential becomes more negative than the resting potential (-80 mV briefly).
    • Sodium-potassium pump restores the resting potential.

Refractory Periods

  • Absolute refractory period: The neuron cannot fire again. Na+ channels are inactivated.
  • Relative refractory period: A stronger-than-usual stimulus is needed to trigger another action potential because the membrane is hyperpolarized.

Propagation of the Action Potential

  • The action potential travels along the axon in a wave-like or saltatory fashion.
  • Unmyelinated axons: Wave-like fashion.
  • Myelinated axons: Saltatory conduction (impulse jumps between Nodes of Ranvier). Speeds up signal transmission considerably.

Importance of Action Potentials

  • Communication between neurons.
  • Release of neurotransmitters into the synaptic cleft.
  • Muscle contraction.

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