Given the fact that the motor cortex controls movement of contralateral body parts,if your grandfather experiences damage to his right hemisphere motor cortex due to a stroke,it is likely that he will
A)not be able to walk at all because he will be paralyzed from the waist down.
B)have some paralysis in the left side of his body.
C)not be able to understand anything you say to him.
D)have some paralysis on the right side of his body.

Question

Given the fact that the motor cortex controls movement of contralateral body parts,if your grandfather experiences damage to his right hemisphere motor cortex due to a stroke,it is likely that he will​ 
A)not be able to walk at all because he will be paralyzed from the waist down. 
B)have some paralysis in the left side of his body. 
C)not be able to understand anything you say to him. 
D)have some paralysis on the right side of his body.

Quizplus · Accepted Answer

Since the motor cortex controls movement of contralateral (opposite) body parts, damage to the right hemisphere motor cortex will result in some paralysis on the left side of the body. Option A is incorrect because the question doesn't mention the stroke affecting the spinal cord, so we cannot assume there will be paralysis from the waist down. Option C is incorrect because it is not related to the motor cortex. Option D is incorrect because the question specifically mentions damage to the right hemisphere, which would result in paralysis on the left side of the body.

Given the Fact That the Motor Cortex Controls Movement of Contralateral