A split-brain patient sees something in her left visual field, and must reach behind a screen and select the object from a group of objects. She will select the object correctly with ____.
A) the left hand
B) the right hand
C) either hand
D) neither hand

Question

Quizplus · Accepted Answer

Split-brain patients have a severed corpus callosum, which connects the left and right hemispheres of the brain. Information from the left visual field is processed by the right hemisphere, which controls the left hand. Therefore, the correct answer is A) the left hand. The right hemisphere cannot communicate with the left hemisphere (where the language centers are located), so the patient would not be able to verbally express what they saw.

A Split-Brain Patient Sees Something in Her Left Visual Field