You have a close friend who has undergone surgery to separate her brain hemispheres. It is MOST likely that, prior to surgery, she suffered from .

The correct answer is "severe epilepsy".

Explanation:

The missing options of this question are:

a. schizophrenia.

b. dyslexia.

c. severe epilepsy.

d. bilateral localisation.

The correct answer is option c. "severe epilepsy".

Severe epilepsy is a brain disorder that causes the person to have seizures or periods of abnormal brain activity that result in unusual behavior. Usually, the seizures start from one hemisphere to another, which makes them more aggressive. One treatment to reduce this condition is to undergone a surgery to separate the brain hemispheres, in what is known as corpus callosotomy.

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