The functions of each |lobe| of the |cerebrum| are coordinated by connecting, or commissural, |fibers|. The largest and densest of these is the |corpus callosum|, a broad, thick band which connects the two ~hemispheres~ and connects through branches to the rest of the surface, or |cortex|, of the |cerebrum|. The two smaller commissural |fibers| are the ~anterior~ commissure, which contains olfactory |fibers| as well as other temporal connections, and the hippocampal commissure which runs transversely below the rear of the |corpus callosum| and is specifically related to the olfactory centers of the |brain|. The |corpus callosum| features three general sections: the front section, which broadens and extends downward in the front, called the genu, the middle section, or trunk, and the rounded ~posterior~ portion, called the splenium. The genu extends downward to the structure known as the rostrum, and from there to the thinner lamina terminalis.
