This illustration describes the major branches of the ulnar nerve at the wrist. The numbers 1 to 4 relate to the main sites of clinical syndrome associated with injury to the nerve:
- Main trunk of the nerve proximal to or within Guyon's canal.
- Deep motor branch proximal to the branches supplying the hypothenar muscles.
- Deep motor branch distal to the hypothenar muscles.
- Superficial branch (mainly sensory).
