NERVOUS SYSTEM SPECIAL SENSE
CEREBRUM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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somatosensory cortex
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occipital lobe
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primary motor cortex
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prefrontal cortex
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visual association cortex
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Detailed explanation-1: -Homunculus. There is a broad representation of the different body parts in the primary motor cortex in an arrangement called a motor homunculus (Latin: little person). The leg area is located close to the midline, in interior sections of the motor area folding into the medial longitudinal fissure.
Detailed explanation-2: -Primary motor cortex encodes the direction of movement. Many neurons in the primary motor cortex are selective for a particular direction of movement. For example, one cell may fire strongly when the hand is moved to the left, whereas it will be inhibited when the hand is moved to the right (Figure 3.8).
Detailed explanation-3: -Answer-d. (d) Motor cortex is crucial for movement and bodily functions thereby stimulation of this part of the brain will cause movement of the lips and mouth.