The median nerve is not the only compression neuropathy of the wrist
The ulnar nerve can become compressed at the level of the wrist as it 1) enters Guyon's canal or 2) or as the deep branch curves around the hook of the hamate
Compression can occur due to carpal bone fractures, local inflammation, ganglias, lipomas, anatomic abnormalities, etc
In sports medicine, the most common mechanism is injury is seen in cyclists (cyclist/handlebar palsy)
http://www.hughston.com/hha/b_15_3_2a.jpg
Also seen in those who participate in racquet sports, baseball, and golf
Symptoms can be isolated motor (claw hand = rare), sensory or both
