Imaging studies of subject M.C. have shown that, following callosotomy, there is _____ to the site of sensory stimulation.
A) increased neural activity ipsilateral
B) increased neural activity contralateral
C) decreased neural activity ipsilateral
D) decreased neural activity contralateral

Question

Quizplus · Accepted Answer

Callosotomy involves severing the corpus callosum, the primary pathway for communication between the two hemispheres of the brain. As a result, sensory stimulation to one hemisphere is no longer transmitted to the other hemisphere. Since the question is asking about the site of sensory stimulation, the answer refers to the hemisphere and not to specific brain regions. When sensory stimulation is presented to one hemisphere, neural activity should be decreased on the ipsilateral (same) side since the other hemisphere is not receiving the information. Therefore, the correct answer is C, decreased neural activity ipsilateral.

Imaging Studies of Subject M