Damage to the ulnar nerve causes problems with sensation and mobility in the wrist and the hand. In a patient with ulnar nerve damage, some of the fingers may become locked into a flexed position.

The vagus nerve is the longest of the 12 cranial nerves. Here, learn about its anatomy, functions, and the kinds of health problems that can occur.

The nerve that causes carpal tunnel syndrome is called the median nerve, and that nerve has 18,000 nerve fibers. But that nerve is responsible for innervating the majority of the human hand.