INSIDE THE SKULL, housed are these areas: anterior fossa, middle fossa, and posterior fossa. The posterior fossa contains the brainstem, cerebellum, and cranial nerves IV-XII. The posterior fossa (orange color) is formed by the occipital bone, which has a large hole (foramen magnum) for passage of the spinal cord.
Art:In the human nervous system, 12 pairs of cranial nerves connect the sense organs and muscles of the head and neck region directly to the brain. Some cranial nerves are sensory, some are motor, and some are mixed, containing both sensory and motor fibers.