What part of the corpus callosum connects the frontal and inferior parts of both hemispheres?

The rostrum of the corpus callosum is specifically responsible for connecting the frontal and inferior parts of both hemispheres. It is a slender, anterior segment that curves downward and forward, providing a pathway that facilitates communication between the frontal lobes and the anterior regions of the temporal lobes of the two hemispheres. This function is critical in coordinating activities that require bilateral collaboration of the brain's frontal and lower regions, such as certain cognitive and emotional tasks.

The genu of the corpus callosum is the anterior bend that connects the frontal lobes, but it is not involved in connecting the inferior parts. The body of the corpus callosum primarily connects the superior frontal and parietal areas, while the splenium is the posterior part that links the occipital and temporal lobes, primarily serving areas farther back in the brain. Each portion has its unique role, but the rostrum’s specific positioning and connections make it the part that links the frontal and inferior regions effectively.