An individual has a severed corpus callosum. If directed to find an object with his left hand, without looking,
A) he probably could not find it.
B) he probably could find it, but could not say what it was.
C) he probably could find it, and could say what it was.

Question

Quizplus · Accepted Answer

The corpus callosum connects the two hemispheres of the brain, allowing them to communicate. If it is severed, information processed in one hemisphere (in this case, the right hemisphere, which controls the left hand) cannot be easily transferred to the other (in this case, the left hemisphere, which is primarily responsible for language in most people). Therefore, the individual could find the object using the left hand (controlled by the right hemisphere) but would struggle to verbally identify it because the language-processing left hemisphere does not receive the information.

An Individual Has a Severed Corpus Callosum