Which brain structure connects the two hemispheres of the brain?

Correct option is C

The corpus callosum is the largest white matter structure in the brain, consisting of approximately 200-300 million axonal projections that connect the left and right cerebral hemispheres. It enables interhemispheric communication, allowing the two hemispheres to share information and coordinate activities. The corpus callosum is divided into regions (rostrum, genu, body, and splenium) that connect corresponding areas of the two hemispheres.

Information Booster:
1. Interhemispheric Communication: Facilitates transfer of sensory, motor, and cognitive information between hemispheres
2. Anatomical Divisions: Consists of rostrum (anterior-inferior), genu (anterior bend), body (middle), and splenium (posterior)
3. Fiber Organization: Different regions connect different cortical areas - genu connects frontal lobes, splenium connects occipital and temporal regions
4. Development: One of the last brain structures to fully myelinate, continuing into the third decade of life
5. Split-Brain Studies: Research on individuals with severed corpus callosum revealed hemispheric specialization and independence

Additional Knowledge:
• Cerebellum (A): Located below the cerebrum, coordinates movement and balance, not a connection between hemispheres
• Superior colliculus (B): Midbrain structure involved in visual reflexes and eye movements
• Transverse fissure (D): A separation/fissure, not a connecting structure - separates cerebrum from cerebellum