If a right-handed subject whose corpus callosum has been cut is asked to reproduce a drawing, you would predict
A)best performance by the right hand.
B)best performance by the left hand.
C)equal performance by the two hands.
D)an inability to draw with either hand.

Question

If a right-handed subject whose corpus callosum has been cut is asked to reproduce a drawing, you would predict ​
A)best performance by the right hand.
B)best performance by the left hand.
C)equal performance by the two hands.
D)an inability to draw with either hand.

Quizplus · Accepted Answer

The corpus callosum connects the two hemispheres of the brain, allowing them to communicate. When it is cut, each hemisphere operates independently. In most people, the left hemisphere (which controls the right side of the body) is dominant for language and tasks involving logic and analytical thinking, while the right hemisphere (which controls the left side of the body) is more involved in spatial abilities, face recognition, and visual imagery. Since drawing requires spatial and visual processing, a right-handed person with a severed corpus callosum would likely perform better with their left hand, which is controlled by the right hemisphere, the side of the brain more involved in these tasks.

If a Right-Handed Subject Whose Corpus Callosum Has Been Cut