Multiple Choice
One treatment for severe epilepsy is to surgically sever the connection between the hemispheres of the cerebrum. What structure is severed in this procedure?
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3. Biological Psychology
The Cortical Forebrain
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Within the homunculus, what does a larger area on the primary motor cortex correspond to?
A
More motor control for that body part.
B
Less motor control for that body part.
C
More sensation for that body part.
D
Less sensation for that body part.
Verified step by step guidance1
Understand the concept of the homunculus: The homunculus is a visual representation of the body within the brain, specifically in the primary motor cortex and the somatosensory cortex.
Identify the role of the primary motor cortex: The primary motor cortex is responsible for voluntary motor control of the body.
Recognize the significance of area size in the homunculus: In the homunculus, a larger area on the primary motor cortex indicates greater motor control and precision required for that body part.
Differentiate between motor and sensory functions: The primary motor cortex is associated with motor control, not sensation, which is handled by the somatosensory cortex.
Conclude the relationship: Therefore, a larger area on the primary motor cortex corresponds to more motor control for that body part, as it requires more neural resources for precise movements.
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