Like spinal nerves, cranial nerves are bundles of sensory or motor fibers that innervate muscles or glands; carry impulses from sensory receptors, or show a combination of these fiber types. They are called cranial nerves because they emerge through foramina or fissures in the cranium and are covered by tubular sheaths derived from the cranial meninges. There are twelve pairs of cranial nerves, which are numbered I to XII, from rostral to caudal, according to their attachment to the brain and penetration of the cranial dura. Their names reflect their general distribution or function.
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18:46Curs: The functional Anatomy of the Cranial nerves Obiect: Anatomie