Neuroscience: Sensory Areas Quiz
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Questions and Answers

Which cortex is responsible for receiving sensory information from pain and temperature?

  • Auditory Cortex
  • Somatosensory Association Cortex
  • Gustatory Cortex
  • Primary Somatosensory Cortex (correct)
  • Which area is involved in integrating and analyzing somatosensory inputs?

  • Gustatory Cortex
  • Somatosensory Association Cortex (correct)
  • Primary Somatosensory Cortex
  • Auditory Association Area
  • What is the function of the Auditory Association Area?

  • Controls balance awareness
  • Processes taste sensations
  • Allows recognition of sound (correct)
  • Receives visual sensations
  • Which region is responsible for awareness of balance?

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

    What function is primarily associated with the Anterior Association Area (Prefrontal Cortex)?

    <p>Decision-making and abstract intellectual functions (D)</p> Signup and view all the answers

    What is the average weight of the human brain?

    <p>3.5 pounds (A)</p> Signup and view all the answers

    Which of the following is NOT a division of the brain?

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

    What role do the lateral ventricles play in the brain's anatomy?

    <p>Connect to the third ventricle via the interventricular foramen (A)</p> Signup and view all the answers

    Which of the following best describes the structure of the brainstem?

    <p>Contains nuclei with cell bodies surrounding the ventricles and tracts of white matter (C)</p> Signup and view all the answers

    How do male and female brains typically differ?

    <p>Females have a larger corpus callosum (D)</p> Signup and view all the answers

    What is unique about the synapses in the human brain?

    <p>There can be as many as 80,000 synapses between neurons (D)</p> Signup and view all the answers

    Which ventricle connects the third and fourth ventricles?

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

    What type of matter primarily composes the outer layer of the cerebrum?

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

    Which part of the brain is located post/inferior to the cerebrum?

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

    What describes the organization of gray and white matter in the brainstem?

    <p>Nuclei of cell bodies surround the ventricles, with irregular white matter tracts (C)</p> Signup and view all the answers

    What is the primary function of the posterior association area?

    <p>Interpreting sensory information and understanding language (D)</p> Signup and view all the answers

    Which structure is primarily responsible for connecting areas within the same hemisphere?

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

    In which hemisphere are logical abilities predominantly processed?

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

    What factor has not been found to contribute to Autism Spectrum Disorder?

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

    What best predicts the likelihood of independent adulthood for individuals on the autism spectrum?

    <p>Intelligence and communication ability (D)</p> Signup and view all the answers

    Which of the following describes the representational hemisphere's main functions?

    <p>Artistic skills and emotional processing (C)</p> Signup and view all the answers

    What is the core role of cerebral nuclei?

    <p>Controlling muscle tone and coordinated movements (A)</p> Signup and view all the answers

    Which type of fibers connect the cortex to the brain stem and spinal cord?

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

    What is the primary function of the dorsal root ganglia?

    <p>They contain cell bodies of sensory neurons. (D)</p> Signup and view all the answers

    Which statement accurately describes the relationship between the gyri and sulci in the cerebral cortex?

    <p>Gyri are the elevated ridges, and sulci are the depressions. (C)</p> Signup and view all the answers

    Which component is involved in the somatic sensory pathway?

    <p>First-order neuron in the peripheral nervous system. (B)</p> Signup and view all the answers

    What is the role of the Broca's area in the brain?

    <p>It regulates speech production. (B)</p> Signup and view all the answers

    What can result from second impact syndrome?

    <p>Severe brain swelling. (C)</p> Signup and view all the answers

    Which area of the brain is primarily involved in directing voluntary muscle movements?

    <p>Primary Motor Cortex. (A)</p> Signup and view all the answers

    What distinctive feature separates the two hemispheres of the brain?

    <p>Longitudinal Fissure. (A)</p> Signup and view all the answers

    In terms of brain structure, what does white matter consist of?

    <p>Nerve fibers organized in tracts. (C)</p> Signup and view all the answers

    Which component is NOT part of the somatic sensory pathway?

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

    What is the primary role of the third-order neuron in the thalamus?

    <p>Relay sensory information to the cortex (A)</p> Signup and view all the answers

    In Parkinson's disease, which of the following symptoms is least likely to be observed?

    <p>Improved voluntary movements (C)</p> Signup and view all the answers

    Which treatment method for Parkinson's disease involves modifying a neurotransmitter?

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

    Which function is primarily associated with the limbic system?

    <p>Regulating emotional states (A)</p> Signup and view all the answers

    Which of the following statements about Huntington's disease is accurate?

    <p>It is caused by protein accumulation in the brain. (D)</p> Signup and view all the answers

    What happens to the Reticular Activating System (RAS) during sleep?

    <p>It is inhibited and reduces stimulus processing. (C)</p> Signup and view all the answers

    Which of the following is a significant function of the hippocampus?

    <p>Formation of long-term memories (A)</p> Signup and view all the answers

    Which function is not associated with the hypothalamus?

    <p>Sending sensory information to the primary sensory cortex (A)</p> Signup and view all the answers

    What is the primary role of the thalamus in the diencephalon?

    <p>Final relay point for sensory information (A)</p> Signup and view all the answers

    Which structure is part of the mesencephalon and is responsible for visual and auditory relay?

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

    Which of the following functions is primarily associated with the pons?

    <p>Linking the cerebellum with the rest of the CNS (B)</p> Signup and view all the answers

    The medulla oblongata is primarily involved in which of the following?

    <p>Regulating heart rate and blood pressure (D)</p> Signup and view all the answers

    What distinctive feature do Purkinje cells of the cerebellum possess?

    <p>Large, highly branched dendrites (B)</p> Signup and view all the answers

    Which of the following accurately describes the function of the cardiovascular centers located in the medulla oblongata?

    <p>They modify heart contractions and blood flow. (C)</p> Signup and view all the answers

    Which layer of the cranial meninges is characterized as double-layered and contains a venous sinus?

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

    What function do the cranial meninges serve in the protection of the brain?

    <p>They absorb mechanical shock to prevent brain injury. (D)</p> Signup and view all the answers

    In the cerebellum, what is the primary role of the arbor vitae?

    <p>To connect the cerebellar cortex with its nuclei. (D)</p> Signup and view all the answers

    What primary role does the choroid plexus play in the central nervous system?

    <p>Produces cerebrospinal fluid (CSF) (C)</p> Signup and view all the answers

    What is the main reason certain compounds cannot pass through the blood-brain barrier (BBB)?

    <p>The capillaries are impermeable to many water-soluble compounds (A)</p> Signup and view all the answers

    How is excess cerebrospinal fluid (CSF) removed from circulation?

    <p>It flows into the venous circulation via the arachnoid villi (C)</p> Signup and view all the answers

    Which function is NOT associated with cerebrospinal fluid (CSF)?

    <p>Acting as a conduit for sensory information (D)</p> Signup and view all the answers

    What characterizes the blood-brain barrier in specific regions of the brain?

    <p>Presence of specialized transport mechanisms for hormones (D)</p> Signup and view all the answers

    What is the primary function of the Olfactory Cortex?

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

    Which sensory area is primarily involved in interpreting auditory inputs?

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

    In which lobe is the Primary Visual Cortex located?

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

    What type of sensations does the Visceral Sensory Area receive?

    <p>Sensations from internal organs (B)</p> Signup and view all the answers

    What cognitive functions are primarily associated with the Anterior Association Area (Prefrontal Cortex)?

    <p>Abstract reasoning and decision making (D)</p> Signup and view all the answers

    Which association area integrates and analyzes somatosensory inputs?

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

    What aspect of sensory processing is primarily reflected in the amount of cortex dedicated to a body region?

    <p>Proportional sensitivity of that body region (D)</p> Signup and view all the answers

    What specific area in the temporal lobe is responsible for processing taste sensations?

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

    Flashcards

    Primary Somatosensory Cortex Location

    Located just behind the central sulcus and receives touch, pressure, pain, taste, and temperature sensations.

    Somatosensory Association Cortex Function

    Processes and analyzes somatosensory input, including the interpretation of touch.

    Auditory Cortex Location

    In the temporal lobe, it receives auditory information like speech, music, and noises.

    Prefrontal Cortex Role

    Advanced thinking, decision-making, emotional control, and working memory.

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    Gustatory Cortex Location

    In the temporal lobe (near the somatosensory area for tongue sensations).

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    Brain weight

    Approximately 3 pounds.

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    Brain neurons

    About 35 billion neurons.

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    Brain function principles

    Neural activity and information processing principles (from Chapter 11) apply.

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    Cerebrum

    Two hemispheres of the brain.

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    Diencephalon

    Thalamus, hypothalamus, and pituitary; part of the brain.

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    Brain Stem

    Mesencephalon, pons, and medulla oblongata.

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    Cerebellum

    Smaller hemispheres, posterior and inferior to cerebrum.

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    Ventricles

    Fluid-filled spaces connected to spinal cavity.

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    Lateral Ventricles

    Two brain cavities, connected indirectly.

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    Brain Gray/White Matter

    Brain composed of gray matter (nuclei of cell bodies), white matter (tracts of axons).

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    Sensory neurons

    Neurons that transmit sensory information from the body to the central nervous system (CNS).

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    Motor neurons

    Neurons that transmit signals from the central nervous system (CNS) to muscles or glands, causing movement or other responses.

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    Primary Motor Cortex

    Part of brain that initiates voluntary movements.

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    Cerebral Cortex

    Outermost layer of the brain, responsible for higher-level functions.

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    Longitudinal Fissure

    Deep groove that separates the two brain hemispheres.

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    Concussion

    Mild traumatic brain injury with temporary loss of consciousness.

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    Traumatic Brain Injury (TBI)

    Acute brain damage due to trauma.

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    Broca's Area

    Brain area responsible for speech production.

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    Medulla Oblongata Location

    The most inferior part of the brainstem, connecting to the spinal cord.

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    Medulla Oblongata Function

    Controls vital autonomic functions like heart rate, blood pressure, and breathing.

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    Cerebellum Function

    Coordinates and smooths out voluntary movements, maintaining balance and posture.

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    Cerebellar Cortex Function

    The outer layer of the cerebellum, responsible for processing and coordinating movements.

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    Cranial Meninges Function

    Protective membranes surrounding the brain, cushioning and preventing damage.

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    Posterior Association Area Location

    Large area in the temporal, parietal, and occipital lobes that receives input from multiple sensory association areas.

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    Posterior Association Area Function

    Interprets sensory information, responds to the prefrontal cortex, aids in language understanding (Wernicke's area), recognizing patterns and faces.

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    Limbic Association Area Function

    Gives emotional meaning to situations.

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    Categorical Hemisphere

    Left hemisphere, primarily responsible for logical processing (language, math, logic).

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    Representational Hemisphere

    Right hemisphere, primarily responsible for intuition, emotions, and artistic functions (visual-spatial).

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    Association Fibers

    Connect areas within the same cerebral hemisphere.

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    Commissural Fibers

    Connect the two cerebral hemispheres.

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    Cerebral Nuclei (Basal Ganglia)

    Located under the lateral ventricles, part of the extrapyramidal system, control muscle coordination and tone (learned movements).

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    Where is CSF produced?

    CSF is produced by the choroid plexus, a network of capillaries located in the ventricles of the brain.

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    CSF Cushioning

    CSF protects the brain by acting as a shock absorber, preventing damage from sudden movements.

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    CSF Transport

    CSF carries nutrients and chemical messengers to the brain and removes waste products.

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    What is the Blood-Brain Barrier?

    The blood-brain barrier restricts the passage of many substances from the blood into the brain, protecting it from harmful molecules.

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    Hypothalamus Exception

    The hypothalamus is a brain region that is not fully protected by the BBB, allowing hormones to reach it and for it to release regulatory substances into the blood.

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    Thalamus Function

    The thalamus acts as a relay station for sensory information, transferring it to the appropriate areas of the cerebral cortex. It also helps filter incoming sensory data, prioritizing important signals and suppressing irrelevant ones.

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    Hypothalamus Functions

    The hypothalamus controls many vital bodily functions including regulating body temperature, hunger and thirst, sleep-wake cycles, and emotions. It also influences hormone production and release by the pituitary gland.

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    What does the pituitary gland do?

    The pituitary gland is an endocrine structure located in the brain. It releases hormones that influence and control various body functions and systems, including growth, metabolism, and reproduction.

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    Mesencephalon Role

    The mesencephalon, also called the midbrain, plays a crucial role in relaying visual and auditory information. It also houses the reticular formation, which is responsible for alertness and arousal.

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    Pons Function

    The pons is responsible for several functions, including relaying sensory and motor information, regulating breathing, and connecting the cerebellum to the rest of the central nervous system.

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    Somatic Sensory Pathway Components

    Sensory receptors, first-order neuron (PNS), second-order neuron (spinal cord/brainstem), third-order neuron (thalamus), and synapse with primary sensory cortex.

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    Decussation (Sensory)

    The crossing over of axons in a sensory pathway.

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    Motor Pathway Neuron Types

    Motor pathways use at least 2 neurons: upper motor neuron (excites/inhibits lower) and lower motor neuron (reaches target).

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    Extrapyramidal Pathway

    Unconscious motor commands originating from the basal nuclei and brainstem.

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    Parkinson's Disease Cause

    Dopamine-producing neurons in the substantia nigra are impaired, leading to synapse problems & issues with opposing muscle groups.

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    Limbic System Function

    Controls emotions, behaviours, and links conscious thought to autonomic functions. Key parts include the amygdala and hippocampus.

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    Neurogenesis Definition

    The formation of new neurons.

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    Reticular Activating System (RAS) Function

    Keeps you alert & filters out unnecessary input(weak stimuli). Plays a role in consciousness and sleep.

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    Primary Somatosensory Cortex

    Located just behind the central sulcus, this cortex receives sensory information like touch, pressure, pain, taste, and temperature from the body.

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    Somatosensory Association Cortex

    This area sits behind the primary somatosensory cortex and analyzes and interprets the sensory information received.

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    Visual Cortex

    Located in the occipital lobe, this area receives information from the eyes and allows us to see.

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    Auditory Cortex

    Found in the temporal lobe, this cortex is where sound information is processed.

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    Olfactory Cortex

    Located in the temporal lobe, this area is responsible for processing smells.

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    Gustatory Cortex

    Located in the parietal lobe, this cortex receives taste sensations.

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    Visceral Sensory Area

    Found in the insula cortex, this area gives you conscious sensations from internal organs like a full bladder or a stomach ache.

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    Prefrontal Cortex: The Executive

    This area, located in the frontal lobe, handles complex thought processes, decision-making, emotional regulation, and observing social rules.

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