Peripheral nerve anatomy and innervation pattern.

This article discusses three basic parts of peripheral nerves. A description of the nerve fiber includes sections on both myelinated and unmyelinated axons. The anatomy of the peripheral nerve at the cellular level is reviewed encompassing the nerve, the surrounding connective tissue framework, and the supportive vascular supply. Finally, normal and abnormal innervation patterns of the hand and forearm are presented. Anastomosis and variations of the normal anatomy are discussed.