Ulnar canal
| Ulnar canal | |
|---|---|
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| Transverse section across the wrist and digits. | |
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| Superficial palmar nerves. | |
| Latin | canalis ulnaris |
The ulnar canal or ulnar tunnel, also called Guyon's canal, is a space at the wrist between flexor retinaculum and the palmar carpal ligament (which runs between the pisiform bone and the hamate bone), through which the ulnar artery and the ulnar nerve travel into the hand.
Eponym
Guyon's canal was named after French surgeon Jean Casimir Félix Guyon (1831–1920). It is debatable whether he actually described the canal himself.
Clinical significance
Entrapment of the ulnar nerve at the ulnar canal can result in ulnar neuropathy.[1] There are four subtypes of ulnar neuropathy at the wrist, of which type II is the most common. Guyon's canal syndrome may be secondary to ganglion cyst formation, or compression against a bicycle handlebar.
See also
References
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