The corpus callosum is severed in split-brain procedures to disrupt communication between:

• A. The two cerebral hemispheres
• B. The brainstem and cortex
• C. The cerebellum and cortex
• D. The limbic system and cortex

Answer: (A)

The main idea is that the corpus callosum is the primary bridge that allows information to pass between the left and right cerebral hemispheres. When this bridge is cut in split-brain procedures, communication between the two halves is disrupted, so each hemisphere can operate more independently. This helps explain why seizures are contained more easily and also reveals how functions tend to lateralize, since information processed on one side may not be readily shared with the other for tasks like verbal reporting. The other connections mentioned aren’t the main pathways linking the hemispheres, so they don’t capture the purpose of severing the corpus callosum.