Surgical severing of the corpus callosum is a potential treatment for severe epilepsy. A post-surgical epileptic is in the car, on the way home from the hospital. Which of the following would be expected when the person is looking straight ahead? A. The person will be able to verbalize the names of streets he sees on the right side of the road but not the names of streets on the left side of the road. B. The person will be able to verbalize the names of streets he sees on the left side of the road but not the names of streets on the right side of the road. C. The person will not be able to verbalize the names of streets on either side of the road. D. The person will be able to verbalize the names of streets on both sides of the road, but they will appear upside down.

The person will be able to verbalize the names of streets he sees on the right side of the road but not the names of streets on the left side of the road.

Explanation:

This is because one of the adverse effects of Corpus Callosotomy( removal of corpus callosum ) is loss of awareness of one side of the body in relation to another.

Thus after the callosotomy , the left hemisphere is isolated from the right hemisphere.Therefore processing of sensory stimuli from the right hemisphere is not reaching the left hemisphere The interpreter( the patients) is therefore not aware of the stimuli processing from right -hemisphere stimuli, this cause oblivion of the left side field of view.

(Note the R.Hemisphere controls the L. Hemisphere and vice-versa)