Cortical Column Structure Quiz
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Questions and Answers

What is the main difference between somatosensory area I and somatosensory area II?

  • Area I has fewer specialized receptors
  • Area I has a high degree of localization, while area II has poor localization (correct)
  • Area II represents the face centrally
  • Area II is more extensive than area I

    • Where does the somatosensory area I lie in the human cerebral cortex?

  • Next to the motor cortex
  • In the frontal lobe
  • Behind the central fissure (correct)
  • In the occipital lobe

    • Which body part is represented in the most lateral portion of somatosensory area I?

  • The torso
  • The arms
  • The head (correct)
  • The legs

    • How are layers of neurons organized in the cerebral cortex?

    <p>Vertically</p> Signup and view all the answers

    What is the organization of sensory cortex columns?

    <p>Vertical columns</p> Signup and view all the answers

    Which part of the body has a higher number of specialized nerve endings according to the text?

    <p>The lips and thumbs</p> Signup and view all the answers

    What is the main function of the somatosensory association area?

    <p>To combine information from different parts of the primary somatosensory area</p> Signup and view all the answers

    What effect does lateral inhibition have on sensory perception?

    <p>Enhances the degree of contrast in the sensory pattern perceived in the cerebral cortex</p> Signup and view all the answers

    Where does surround inhibition primarily occur in the dorsal column system?

    <p>At each synaptic level, including the dorsal column nuclei and thalamus</p> Signup and view all the answers

    Which part of the brain plays a role in deciphering complex body sensations?

    <p>Somatosensory association area</p> Signup and view all the answers

    What contributes to increasing the degree of contrast in perceived spatial patterns?

    <p>Inhibition of lateral spread of excitatory signals</p> Signup and view all the answers

    Which region combines sensory information from multiple points within the primary somatosensory area?

    <p>Somatosensory association area</p> Signup and view all the answers

    What is the function of the columns of neurons at layers IV in the cortex?

    <p>Function almost independently</p> Signup and view all the answers

    Which area of the cerebral cortex is responsible for responding to muscle, tendon, and joint receptors?

    <p>Somatosensory area I</p> Signup and view all the answers

    What is the main function of Brodmann’s areas 5 and 7 in the cerebral cortex?

    <p>Somatosensory association</p> Signup and view all the answers

    What does the destruction of somatosensory area I mainly affect?

    <p>Weight perception of objects</p> Signup and view all the answers

    Which part of the brain allows for some degree of localization in somatosensory area I?

    <p>Thalamus</p> Signup and view all the answers

    How does sensory signal analysis change as it spreads backward into the parietal cortex?

    <p>It becomes more complex</p> Signup and view all the answers

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