Podcast
Questions and Answers
What role does the cerebellum play in movement?
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?
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?
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?
Which part of the brain is crucial for initiating movement?
Which component is essential for processing pain perception?
Which component is essential for processing pain perception?
What initiates an action potential in a neuron?
What initiates an action potential in a neuron?
What causes the depolarization phase of an action potential?
What causes the depolarization phase of an action potential?
What is the role of the sodium-potassium pump in maintaining resting membrane potential?
What is the role of the sodium-potassium pump in maintaining resting membrane potential?
Which phase of an action potential follows the peak?
Which phase of an action potential follows the peak?
During the hyperpolarization phase, the membrane potential reaches which approximate value?
During the hyperpolarization phase, the membrane potential reaches which approximate value?
What is the primary reason for the negative resting membrane potential of a neuron?
What is the primary reason for the negative resting membrane potential of a neuron?
What event occurs at the peak of the action potential?
What event occurs at the peak of the action potential?
Which statement correctly describes the role of ion channels during rest?
Which statement correctly describes the role of ion channels during rest?
What occurs during the absolute refractory period?
What occurs during the absolute refractory period?
What distinguishes saltatory conduction in myelinated axons?
What distinguishes saltatory conduction in myelinated axons?
What role do action potentials play in neurotransmitter release?
What role do action potentials play in neurotransmitter release?
What is the primary function of the refractory period in neurons?
What is the primary function of the refractory period in neurons?
During which phase is a stronger-than-usual stimulus needed to trigger an action potential?
During which phase is a stronger-than-usual stimulus needed to trigger an action potential?
Which is not a consequence of action potentials?
Which is not a consequence of action potentials?
How do unmyelinated axons conduct action potentials?
How do unmyelinated axons conduct action potentials?
What is the effect of the hyperpolarization of a neuron during the relative refractory period?
What is the effect of the hyperpolarization of a neuron during the relative refractory period?
What is the main function of the Suprachiasmatic Nucleus (SCN)?
What is the main function of the Suprachiasmatic Nucleus (SCN)?
Which sleep stage is characterized by rapid eye movements and is commonly associated with vivid dreaming?
Which sleep stage is characterized by rapid eye movements and is commonly associated with vivid dreaming?
What is a characteristic of insomnia?
What is a characteristic of insomnia?
Which type of memory is primarily responsible for storing facts and events?
Which type of memory is primarily responsible for storing facts and events?
What is the primary focus of clinical neuroscience?
What is the primary focus of clinical neuroscience?
Which of the following is NOT associated with schizophrenia according to the diagnostic criteria?
Which of the following is NOT associated with schizophrenia according to the diagnostic criteria?
What role does brain plasticity play in learning?
What role does brain plasticity play in learning?
What is a common treatment for mood disorders?
What is a common treatment for mood disorders?
Which cognitive function is primarily associated with the prefrontal cortex?
Which cognitive function is primarily associated with the prefrontal cortex?
What is a common feature of Seasonal Affective Disorder (SAD)?
What is a common feature of Seasonal Affective Disorder (SAD)?
Which disorder is characterized by alternating periods of depression and mania?
Which disorder is characterized by alternating periods of depression and mania?
What is a significant brain correlate of schizophrenia?
What is a significant brain correlate of schizophrenia?
Which of the following best describes synesthesia?
Which of the following best describes synesthesia?
Which type of disorder includes phobias, panic disorders, and PTSD?
Which type of disorder includes phobias, panic disorders, and PTSD?
What is a common long-term effect of a stroke?
What is a common long-term effect of a stroke?
Which type of seizure is classified as focal?
Which type of seizure is classified as focal?
What is the concordance rate for schizophrenia in identical twins?
What is the concordance rate for schizophrenia in identical twins?
What is a treatment option specifically for Multiple Sclerosis?
What is a treatment option specifically for Multiple Sclerosis?
What commonly causes traumatic brain injury (TBI) in individuals under 40?
What commonly causes traumatic brain injury (TBI) in individuals under 40?
Which of the following is a characteristic of Alzheimer's Disease?
Which of the following is a characteristic of Alzheimer's Disease?
What is one potential cause of Multiple Sclerosis?
What is one potential cause of Multiple Sclerosis?
What is a primary treatment for severe depression?
What is a primary treatment for severe depression?
Which condition is treated with L-Dopa?
Which condition is treated with L-Dopa?
What does Deep Brain Stimulation (DBS) primarily use to treat?
What does Deep Brain Stimulation (DBS) primarily use to treat?
Which structure is primarily responsible for refining movement accuracy?
Which structure is primarily responsible for refining movement accuracy?
Which system plays a key role in controlling balance and spatial orientation?
Which system plays a key role in controlling balance and spatial orientation?
What is the primary function of the spinal cord in relation to movement?
What is the primary function of the spinal cord in relation to movement?
Which area of the brain is primarily involved in the planning and execution of voluntary movements?
Which area of the brain is primarily involved in the planning and execution of voluntary movements?
Which system is primarily associated with interpreting and responding to sensory stimuli?
Which system is primarily associated with interpreting and responding to sensory stimuli?
What is a common treatment for anxiety disorders?
What is a common treatment for anxiety disorders?
Which of the following symptoms is a primary indicator of Major Depression?
Which of the following symptoms is a primary indicator of Major Depression?
What is a known genetic factor linked to schizophrenia?
What is a known genetic factor linked to schizophrenia?
Which factor is NOT a known cause of neurological disorders?
Which factor is NOT a known cause of neurological disorders?
What treatment is commonly used in managing mood disorders?
What treatment is commonly used in managing mood disorders?
What are the brain correlates typically associated with schizophrenia?
What are the brain correlates typically associated with schizophrenia?
What is a significant developmental factor linked to schizophrenia?
What is a significant developmental factor linked to schizophrenia?
What is the main characteristic of REM sleep?
What is the main characteristic of REM sleep?
Which of the following descriptions best fits traumatic brain injury (TBI)?
Which of the following descriptions best fits traumatic brain injury (TBI)?
What is the typical membrane potential of a neuron at rest?
What is the typical membrane potential of a neuron at rest?
How does Seasonal Affective Disorder (SAD) primarily affect individuals?
How does Seasonal Affective Disorder (SAD) primarily affect individuals?
Which ion primarily causes depolarization during an action potential?
Which ion primarily causes depolarization during an action potential?
What role does the Suprachiasmatic Nucleus (SCN) play in the body?
What role does the Suprachiasmatic Nucleus (SCN) play in the body?
What event occurs during the repolarization phase of an action potential?
What event occurs during the repolarization phase of an action potential?
Which type of sleep disorder involves episodes of suddenly falling asleep during the day?
Which type of sleep disorder involves episodes of suddenly falling asleep during the day?
When does hyperpolarization occur during an action potential?
When does hyperpolarization occur during an action potential?
What is the primary function of neural circuits involved in memory?
What is the primary function of neural circuits involved in memory?
What is the role of the sodium-potassium pump at rest?
What is the role of the sodium-potassium pump at rest?
Which concept best describes the brain's ability to adapt and reorganize itself?
Which concept best describes the brain's ability to adapt and reorganize itself?
What must happen for an action potential to be initiated?
What must happen for an action potential to be initiated?
In disorders like insomnia, which of the following symptoms is most commonly experienced?
In disorders like insomnia, which of the following symptoms is most commonly experienced?
What is one of the characteristics of lucid dreaming?
What is one of the characteristics of lucid dreaming?
Which of the following describes the peak of an action potential?
Which of the following describes the peak of an action potential?
Which factor contributes to the negative resting membrane potential of a neuron?
Which factor contributes to the negative resting membrane potential of a neuron?
What type of stroke is characterized by a blockage obstructing blood flow to the brain?
What type of stroke is characterized by a blockage obstructing blood flow to the brain?
Which of the following is a common treatment for epilepsy?
Which of the following is a common treatment for epilepsy?
What is a major pathological feature of Alzheimer's Disease?
What is a major pathological feature of Alzheimer's Disease?
Which treatment is specifically designed to induce neurogenesis?
Which treatment is specifically designed to induce neurogenesis?
What is a potential consequence of untreated stroke?
What is a potential consequence of untreated stroke?
Which substance is generally used to treat Parkinson's disease?
Which substance is generally used to treat Parkinson's disease?
What is the primary function of transcranial magnetic stimulation (TMS)?
What is the primary function of transcranial magnetic stimulation (TMS)?
What condition is characterized by an autoimmune response leading to the destruction of myelin in the nervous system?
What condition is characterized by an autoimmune response leading to the destruction of myelin in the nervous system?
What occurs during the absolute refractory period of a neuron?
What occurs during the absolute refractory period of a neuron?
How do action potentials facilitate communication between neurons?
How do action potentials facilitate communication between neurons?
What distinguishes the process of saltatory conduction in myelinated axons?
What distinguishes the process of saltatory conduction in myelinated axons?
What is a necessary condition for generating a new action potential during the relative refractory period?
What is a necessary condition for generating a new action potential during the relative refractory period?
What characterizes the propagation of action potentials in unmyelinated axons?
What characterizes the propagation of action potentials in unmyelinated axons?
Which statement accurately describes the effects of neurotransmitter release triggered by an action potential?
Which statement accurately describes the effects of neurotransmitter release triggered by an action potential?
What consequence does hyperpolarization during the relative refractory period have on neuronal firing?
What consequence does hyperpolarization during the relative refractory period have on neuronal firing?
What role does sodium play in the generation of action potentials?
What role does sodium play in the generation of action potentials?
Which mechanism contributes to the maintenance of a negative resting membrane potential?
Which mechanism contributes to the maintenance of a negative resting membrane potential?
What occurs during the repolarization phase of an action potential?
What occurs during the repolarization phase of an action potential?
During which phase of an action potential does the membrane potential briefly become more negative than the resting potential?
During which phase of an action potential does the membrane potential briefly become more negative than the resting potential?
What is the primary role of the sodium-potassium pump in neurons?
What is the primary role of the sodium-potassium pump in neurons?
Which event is associated with the peak of the action potential?
Which event is associated with the peak of the action potential?
Which stimulus is most likely to trigger the initiation of an action potential?
Which stimulus is most likely to trigger the initiation of an action potential?
What is the approximate resting membrane potential of a typical neuron?
What is the approximate resting membrane potential of a typical neuron?
What characterizes the absolute refractory period in a neuron?
What characterizes the absolute refractory period in a neuron?
What is the primary difference in how action potentials propagate in myelinated versus unmyelinated axons?
What is the primary difference in how action potentials propagate in myelinated versus unmyelinated axons?
What stimulus is required during the relative refractory period to trigger another action potential?
What stimulus is required during the relative refractory period to trigger another action potential?
Which role does action potential play in communication between neurons?
Which role does action potential play in communication between neurons?
Which statement correctly reflects the benefit of saltatory conduction in neurons?
Which statement correctly reflects the benefit of saltatory conduction in neurons?
What occurs at the axon terminal as a result of an action potential?
What occurs at the axon terminal as a result of an action potential?
What is a consequence of the hyperpolarization of a neuron?
What is a consequence of the hyperpolarization of a neuron?
Which process is responsible for the rapid transmission of action potentials in myelinated axons?
Which process is responsible for the rapid transmission of action potentials in myelinated axons?
Which factor is most associated with the development of schizophrenia?
Which factor is most associated with the development of schizophrenia?
What is a common symptom experienced in major depression?
What is a common symptom experienced in major depression?
What distinguishes acute anxiety disorders from chronic types?
What distinguishes acute anxiety disorders from chronic types?
Which treatment is commonly used for anxiety disorders?
Which treatment is commonly used for anxiety disorders?
What is a key characteristic of traumatic brain injury (TBI) symptoms?
What is a key characteristic of traumatic brain injury (TBI) symptoms?
What role do dopamine abnormalities play in psychiatric disorders?
What role do dopamine abnormalities play in psychiatric disorders?
Which characteristic is commonly associated with mood disorders such as bipolar disorder?
Which characteristic is commonly associated with mood disorders such as bipolar disorder?
Which factor could contribute to anxiety disorders in relation to environmental influences?
Which factor could contribute to anxiety disorders in relation to environmental influences?
What role does the cerebellum play in movement accuracy?
What role does the cerebellum play in movement accuracy?
Which component of the auditory system is primarily responsible for processing language and music?
Which component of the auditory system is primarily responsible for processing language and music?
Which system integrates and responds to sensory information related to balance?
Which system integrates and responds to sensory information related to balance?
What is the primary function of the basal ganglia in motor control?
What is the primary function of the basal ganglia in motor control?
Which part of the nervous system is responsible for mediating reflex actions?
Which part of the nervous system is responsible for mediating reflex actions?
Which type of stroke is characterized by bleeding in the brain?
Which type of stroke is characterized by bleeding in the brain?
What is a common treatment approach for epilepsy characterized by localized seizures?
What is a common treatment approach for epilepsy characterized by localized seizures?
What treatment option for neurological disorders aims to stimulate neurogenesis?
What treatment option for neurological disorders aims to stimulate neurogenesis?
Which of the following is a hallmark of Alzheimer’s Disease?
Which of the following is a hallmark of Alzheimer’s Disease?
Which condition is associated with a significant decrease in sensory perception and executive function with age?
Which condition is associated with a significant decrease in sensory perception and executive function with age?
Which pharmacological treatment is primarily used for managing Parkinson's disease?
Which pharmacological treatment is primarily used for managing Parkinson's disease?
What is a significant risk associated with Electroconvulsive Therapy (ECT)?
What is a significant risk associated with Electroconvulsive Therapy (ECT)?
Which type of substance is often seen with neurodegenerative disorders, including Alzheimer's Disease?
Which type of substance is often seen with neurodegenerative disorders, including Alzheimer's Disease?
Which component is primarily involved in regulating circadian rhythms?
Which component is primarily involved in regulating circadian rhythms?
What characterizes REM sleep?
What characterizes REM sleep?
Which type of sleep disorder involves excessive daytime sleepiness?
Which type of sleep disorder involves excessive daytime sleepiness?
What is primarily responsible for the consolidation of long-term memories?
What is primarily responsible for the consolidation of long-term memories?
Which aspect of cognition is primarily associated with the frontal lobes?
Which aspect of cognition is primarily associated with the frontal lobes?
What type of memory is generally considered short-term and limited in capacity?
What type of memory is generally considered short-term and limited in capacity?
Which physiological system is involved in regulating emotional memory?
Which physiological system is involved in regulating emotional memory?
What condition is primarily linked with reduced exposure to natural light during specific seasons?
What condition is primarily linked with reduced exposure to natural light during specific seasons?
What is a primary role of the cerebellum in relation to movements?
What is a primary role of the cerebellum in relation to movements?
Which system is primarily responsible for spatial awareness and balance?
Which system is primarily responsible for spatial awareness and balance?
Which part of the brain is primarily involved in higher-level coordination of skilled movements?
Which part of the brain is primarily involved in higher-level coordination of skilled movements?
Pain perception is primarily processed in which part of the nervous system?
Pain perception is primarily processed in which part of the nervous system?
What occurs when the membrane potential of a neuron reaches around -55 mV?
What occurs when the membrane potential of a neuron reaches around -55 mV?
During which phase of the action potential do sodium channels inactivate?
During which phase of the action potential do sodium channels inactivate?
What primarily maintains the resting negative charge inside a neuron?
What primarily maintains the resting negative charge inside a neuron?
What happens during the hyperpolarization phase of an action potential?
What happens during the hyperpolarization phase of an action potential?
Which mechanism is responsible for establishing the resting membrane potential?
Which mechanism is responsible for establishing the resting membrane potential?
Which of the following ions is primarily responsible for the depolarization during an action potential?
Which of the following ions is primarily responsible for the depolarization during an action potential?
Which of the following events occurs during repolarization?
Which of the following events occurs during repolarization?
What role do ion channels play when a neuron is at rest?
What role do ion channels play when a neuron is at rest?
Which component is primarily responsible for regulating circadian rhythms in the body?
Which component is primarily responsible for regulating circadian rhythms in the body?
What stage of sleep is primarily associated with vivid dreaming?
What stage of sleep is primarily associated with vivid dreaming?
Which disorder is characterized by excessive sleepiness during the day and can significantly impact daily functioning?
Which disorder is characterized by excessive sleepiness during the day and can significantly impact daily functioning?
What type of memory is primarily involved in recalling how to perform tasks, such as riding a bicycle?
What type of memory is primarily involved in recalling how to perform tasks, such as riding a bicycle?
What are the common symptoms of schizophrenia as defined by the DSM?
What are the common symptoms of schizophrenia as defined by the DSM?
Which neural structure plays a crucial role in emotional regulation and memory formation?
Which neural structure plays a crucial role in emotional regulation and memory formation?
What is the primary neurochemical abnormality linked to schizophrenia?
What is the primary neurochemical abnormality linked to schizophrenia?
Which cognitive function is primarily associated with the ability to plan and organize actions towards achieving goals?
Which cognitive function is primarily associated with the ability to plan and organize actions towards achieving goals?
Which condition is characterized by alternating periods of depression and mania?
Which condition is characterized by alternating periods of depression and mania?
What term describes the condition when individuals experience a disorder characterized by the perception of non-existent stimuli, such as seeing colors with numbers?
What term describes the condition when individuals experience a disorder characterized by the perception of non-existent stimuli, such as seeing colors with numbers?
Which aspect of brain function is primarily responsible for the integration of sensory information and higher order cognitive processes?
Which aspect of brain function is primarily responsible for the integration of sensory information and higher order cognitive processes?
What is a common treatment option for anxiety disorders?
What is a common treatment option for anxiety disorders?
What are common causes of traumatic brain injury (TBI) in individuals under 40?
What are common causes of traumatic brain injury (TBI) in individuals under 40?
Which disorder is linked to prenatal origins and excessive pruning of cortical connections?
Which disorder is linked to prenatal origins and excessive pruning of cortical connections?
What treatment is commonly used for severe depression?
What treatment is commonly used for severe depression?
What are the potential long-term effects of a stroke?
What are the potential long-term effects of a stroke?
Which type of seizure is characterized by localized brain activity?
Which type of seizure is characterized by localized brain activity?
What is a common autoimmune disease that leads to myelin loss?
What is a common autoimmune disease that leads to myelin loss?
What characterizes amyloid plaques in Alzheimer's Disease?
What characterizes amyloid plaques in Alzheimer's Disease?
Which factor is a known predisposing factor for Alzheimer's Disease?
Which factor is a known predisposing factor for Alzheimer's Disease?
What is the primary function of GABA agonists in epilepsy treatment?
What is the primary function of GABA agonists in epilepsy treatment?
Which treatment option focuses on inducing neurogenesis?
Which treatment option focuses on inducing neurogenesis?
What is the effect of the relative refractory period on neuron firing?
What is the effect of the relative refractory period on neuron firing?
How does saltatory conduction enhance the propagation of action potentials in myelinated axons?
How does saltatory conduction enhance the propagation of action potentials in myelinated axons?
What is the primary role of action potentials in the nervous system?
What is the primary role of action potentials in the nervous system?
Which statement accurately describes unmyelinated axon conduction?
Which statement accurately describes unmyelinated axon conduction?
What initiates the release of neurotransmitters at the axon terminal?
What initiates the release of neurotransmitters at the axon terminal?
What is a characteristic feature of action potentials in neurons?
What is a characteristic feature of action potentials in neurons?
What happens to the neuron during the hyperpolarization phase?
What happens to the neuron during the hyperpolarization phase?
What role does the cerebellum play in movement coordination?
What role does the cerebellum play in movement coordination?
How does the somatosensory system contribute to movement?
How does the somatosensory system contribute to movement?
What is one key function of the basal ganglia in movement control?
What is one key function of the basal ganglia in movement control?
Why is the spinal cord important for reflexes?
Why is the spinal cord important for reflexes?
Which aspect of auditory processing is primarily associated with the brain's ability to differentiate loudness and location of sounds?
Which aspect of auditory processing is primarily associated with the brain's ability to differentiate loudness and location of sounds?
What is the typical resting membrane potential of a neuron?
What is the typical resting membrane potential of a neuron?
What initiates an action potential when a neuron receives a stimulus?
What initiates an action potential when a neuron receives a stimulus?
During which phase of an action potential do voltage-gated sodium channels open?
During which phase of an action potential do voltage-gated sodium channels open?
What happens to the membrane potential during hyperpolarization?
What happens to the membrane potential during hyperpolarization?
What is the primary mechanism that maintains the resting membrane potential of a neuron?
What is the primary mechanism that maintains the resting membrane potential of a neuron?
What role do negatively charged proteins play in resting membrane potential?
What role do negatively charged proteins play in resting membrane potential?
Which of the following is a common treatment for major depression?
Which of the following is a common treatment for major depression?
What genetic factor is associated with schizophrenia?
What genetic factor is associated with schizophrenia?
What is a primary cause of traumatic brain injury (TBI) in young adults?
What is a primary cause of traumatic brain injury (TBI) in young adults?
What is a major characteristic of bipolar disorder?
What is a major characteristic of bipolar disorder?
Which psychiatric disorder is characterized by symptoms such as worthlessness and suicidal ideation?
Which psychiatric disorder is characterized by symptoms such as worthlessness and suicidal ideation?
Which of the following statements is true regarding anxiety disorders?
Which of the following statements is true regarding anxiety disorders?
What developmental factor is associated with schizophrenia?
What developmental factor is associated with schizophrenia?
Which sleep stage is most associated with vivid dreaming?
Which sleep stage is most associated with vivid dreaming?
What is a common characteristic of insomnia?
What is a common characteristic of insomnia?
Which type of memory is primarily responsible for the recall of skills and procedures?
Which type of memory is primarily responsible for the recall of skills and procedures?
What best defines 'lucid dreaming'?
What best defines 'lucid dreaming'?
Which disorder includes symptoms such as prolonged periods of excessive sleepiness?
Which disorder includes symptoms such as prolonged periods of excessive sleepiness?
What aspect of neuroeconomics primarily examines?
What aspect of neuroeconomics primarily examines?
Which condition is commonly associated with disruptions in circadian rhythms and can lead to mood changes?
Which condition is commonly associated with disruptions in circadian rhythms and can lead to mood changes?
What is a potential long-term effect of a stroke?
What is a potential long-term effect of a stroke?
Which type of stroke results from a blockage in blood vessels?
Which type of stroke results from a blockage in blood vessels?
What classification best describes generalized seizures?
What classification best describes generalized seizures?
Which of the following is an autoimmune disease associated with myelin loss?
Which of the following is an autoimmune disease associated with myelin loss?
What are amyloid plaques and neurofibrillary tangles associated with?
What are amyloid plaques and neurofibrillary tangles associated with?
Which treatment is commonly used for severe depression and has memory loss as a risk?
Which treatment is commonly used for severe depression and has memory loss as a risk?
Which substance is commonly used to treat Parkinson's Disease?
Which substance is commonly used to treat Parkinson's Disease?
What is a significant challenge associated with pharmacological treatments for neurological disorders?
What is a significant challenge associated with pharmacological treatments for neurological disorders?
What happens during the absolute refractory period of a neuron?
What happens during the absolute refractory period of a neuron?
What characterizes the relative refractory period?
What characterizes the relative refractory period?
How does saltatory conduction differ from conduction in unmyelinated axons?
How does saltatory conduction differ from conduction in unmyelinated axons?
What is a primary function of action potentials in neurons?
What is a primary function of action potentials in neurons?
In what way does an impulse travel along myelinated axons?
In what way does an impulse travel along myelinated axons?
What effect does hyperpolarization have during the relative refractory period?
What effect does hyperpolarization have during the relative refractory period?
Which statement correctly reflects the propagation of action potentials in unmyelinated axons?
Which statement correctly reflects the propagation of action potentials in unmyelinated axons?
What is one consequence of action potentials for muscle neurons?
What is one consequence of action potentials for muscle neurons?
Flashcards
Action Potential
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
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
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
Ion Channels
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Threshold Potential
Threshold Potential
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Depolarization
Depolarization
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Repolarization
Repolarization
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Hyperpolarization
Hyperpolarization
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Absolute Refractory Period
Absolute Refractory Period
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Relative Refractory Period
Relative Refractory Period
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Propagation of Action Potential
Propagation of Action Potential
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Saltatory Conduction
Saltatory Conduction
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Communication
Communication
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Neurotransmitter Release
Neurotransmitter Release
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Muscle Activation
Muscle Activation
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Visual Pathway
Visual Pathway
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Echolocation
Echolocation
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Hearing Pitch
Hearing Pitch
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Detecting Loudness and Location
Detecting Loudness and Location
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Language in the Brain
Language in the Brain
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Music in the Brain
Music in the Brain
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Ischemic Stroke
Ischemic Stroke
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Hemorrhagic Stroke
Hemorrhagic Stroke
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Epilepsy
Epilepsy
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Focal Seizure
Focal Seizure
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Generalized Seizure
Generalized Seizure
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Alzheimer's Disease (AD)
Alzheimer's Disease (AD)
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Deep Brain Stimulation (DBS)
Deep Brain Stimulation (DBS)
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Transcranial Magnetic Stimulation (TMS)
Transcranial Magnetic Stimulation (TMS)
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Bálint Syndrome
Bálint Syndrome
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Dissociation Between Motor Behavior and Conscious Awareness
Dissociation Between Motor Behavior and Conscious Awareness
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Lucid Dreaming
Lucid Dreaming
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Schizophrenia
Schizophrenia
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Mood Disorders
Mood Disorders
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Anxiety Disorders
Anxiety Disorders
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Traumatic Brain Injury (TBI)
Traumatic Brain Injury (TBI)
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Clinical Neuroscience
Clinical Neuroscience
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Circadian Rhythms
Circadian Rhythms
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Suprachiasmatic Nucleus (SCN)
Suprachiasmatic Nucleus (SCN)
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NREM Sleep
NREM Sleep
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REM Sleep
REM Sleep
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Dreaming
Dreaming
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Insomnia
Insomnia
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Brain Plasticity
Brain Plasticity
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Attention
Attention
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Propagation of the Action Potential
Propagation of the Action Potential
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Physical Dimensions of Sound Waves
Physical Dimensions of Sound Waves
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Tinnitus
Tinnitus
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Transducing Sound to Neural Impulses
Transducing Sound to Neural Impulses
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What is the Suprachiasmatic Nucleus (SCN)?
What is the Suprachiasmatic Nucleus (SCN)?
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What is Brain Plasticity?
What is Brain Plasticity?
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What is Dreaming?
What is Dreaming?
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What is Insomnia?
What is Insomnia?
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What is Episodic Memory?
What is Episodic Memory?
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What is Clinical Neuroscience?
What is Clinical Neuroscience?
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What is Mood Disorder?
What is Mood Disorder?
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What is Attention?
What is Attention?
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Frequency in Sound
Frequency in Sound
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Amplitude in Sound
Amplitude in Sound
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Sound Transduction
Sound Transduction
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What is the resting membrane potential?
What is the resting membrane potential?
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What is an action potential?
What is an action potential?
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What is threshold potential?
What is threshold potential?
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What is depolarization?
What is depolarization?
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What is repolarization?
What is repolarization?
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What is hyperpolarization?
What is hyperpolarization?
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What is the Sodium-Potassium Pump?
What is the Sodium-Potassium Pump?
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What are ion channels?
What are ion channels?
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What is echolocation?
What is echolocation?
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What is hearing pitch?
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How do we detect sound location?
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Where are language and music processed in the brain?
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How do nonhuman animals communicate using sound?
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Multisensory Integration
Multisensory Integration
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Executive Function
Executive Function
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Spatial Cognition
Spatial Cognition
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Alzheimer's Disease
Alzheimer's Disease
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Parkinson's Disease
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Behavioral Treatments
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What is sound transduction?
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What is Parkinson's Disease?
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What is Multisensory Integration?
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What are Behavioral Treatments?
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What is resting membrane potential?
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Biological Rhythms
Biological Rhythms
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Sleep Stages
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NREM Sleep (N-sleep)
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REM Sleep (R-sleep)
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Hypersomnias
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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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