EMBRYOLOGY
NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Motor cortex of left hemisphere
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Motor cortex of right hemisphere
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Sensory cortex of left hemisphere
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Sensory cortex of right hemisphere
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Detailed explanation-1: -The brain is divided into symmetrical left and right hemispheres. Each hemisphere is in charge of the opposite side of the body, so your right brain controls your left hand. The right hemisphere also takes in sensory input from your left side and vice versa.
Detailed explanation-2: -Stimulating the left primary motor cortex would cause the right side of the body to move. The messages for movement and sensation cross to the other side of the brain and cause the opposite limb to move or feel a sensation. The right side of the brain controls the left side of the body and vice versa.
Detailed explanation-3: -Specifically, in left-handers, the motor cortex in the right side of the brain (the left side of the body is controlled by the right side of the brain, and vice versa) is dominant for fine motor behavior. In contrast, in right-handers, the left motor cortex is better at fine motor tasks such as writing.