The hypothenar eminence is formed by ADM, FDM, and ODM. All three receive deep ulnar nerve innervation via the deep palmar branch in Guyon's canal.
| Origin | Pisiform, hook of hamate, flexor retinaculum (collectively) |
|---|---|
| Insertion | Proximal phalanx of little finger, fifth metacarpal (collectively) |
| Nerve Supply | Deep branch of ulnar nerve (C8, T1) for all three muscles |
| Blood Supply | Ulnar artery |
| Actions | Little finger abduction (ADM); Little finger MCP flexion (FDM); Little finger opposition — CMC5 rotation (ODM) |
|---|
Hypothenar wasting from zone II-III Guyon's canal compression affects all three muscles. Hypothenar hammer syndrome from repetitive impact damages the adjacent ulnar artery.
The ulnar palmar mass — palpated during resisted little finger abduction.
Ulnar nerve compression producing hypothenar atrophy with preserved forearm function, managed by decompression.
This website uses cookies to enhance your experience. Some are essential for site functionality, while others help us analyze and improve your usage experience. Please review your options and make your choice.
If you are under 16 years old, please ensure that you have received consent from your parent or guardian for any non-essential cookies.
Your privacy is important to us. You can adjust your cookie settings at any time. For more information about how we use data, please read our privacy policy. You may change your preferences at any time by clicking on the settings button below.
Note that if you choose to disable some types of cookies, it may impact your experience of the site and the services we are able to offer.
Some required resources have been blocked, which can affect third-party services and may cause the site to not function properly.
This website uses cookies to enhance your browsing experience and ensure the site functions properly. By continuing to use this site, you acknowledge and accept our use of cookies.
