In neuroanatomy, cranial nerves are classified by the functional components of nerve fibers they carry, a framework that categorizes fiber types by the kind of information conveyed and its origin (somatic vs. visceral) or direction (afferent/sensory vs. efferent/motor). The five defined functional components are general somatic afferent (general body sensation), general visceral afferent (visceral sensation), special afferent (special senses: smell, vision, taste, equilibrium, audition), general somatic efferent (skeletal muscle innervation), general visceral efferent (glands, smooth muscle, cardiac muscle), and branchial efferent (innervation of structures derived from the pharyngeal arches).
In neuroanatomy, cranial nerves are classified by the functional components of nerve fibers they carry, a framework that categorizes fiber types by the kind of information conveyed and its origin (so…