What is the name of the second tract connecting the hemispheres, not often discussed?

• A. Corpus callosum
• B. Anterior commissure
• C. Fornix
• D. Internal capsule

Answer: (B)

Interhemispheric communication is carried by commissural fibers. The largest interhemispheric bridge is the corpus callosum, which spans the two hemispheres and provides extensive connectivity. After that, the next notable interhemispheric tract is the anterior commissure. This smaller bundle crosses the midline in the anterior brain and mainly connects parts of the temporal lobes, carrying some olfactory and limbic fibers. It’s less prominent than the corpus callosum, which is why it’s not discussed as often.

The fornix is a limbic pathway linking the hippocampus to the mammillary bodies, not a cross-hemisphere connector. The internal capsule contains projection fibers traveling to and from the cortex but does not connect the hemispheres.