* An ordinary nerve is made up of several bundles of nerve fibers, each bundle inclosed in a special sheath (the perineurium) and all bound together in a connective tissue sheath and framework (the epineurium) containing blood vessels and lymphatics.

he led me on to mightiest deeds,
Above the nerve of mortal arm. Milton.

Nerve cell (Anat.), one of the nucleated cells with which nerve fibers are connected; a ganglion cell. -- Nerve fiber (Anat.), one of the fibers of which nerves are made up. These fibers are either medullated or nonmedullated. in both kinds the essential part is the translucent threadlike axis cylinder which is continuous the whole length of the fiber. -- Nerve stretching (Med.), the operation of stretching a nerve in order to remedy diseases such as tetanus, which are supposed to be influenced by the condition of the nerve or its connections.