Table of Contents
Summary
- Origins
- Lateral epicondyle of the 🦴 humerus
- Insertions
- Extensor expansions of digits two through five
- Actions
- Extends digits two through five
- Assists wrist extension
The extensor digitorum lies in the posterior forearm and sends four thin tendons to the back of the hand. Each tendon crosses the dorsal wrist and inserts into the extensor expansions of digits two through five, allowing them to straighten at the metacarpophalangeal joints.
It shares a common origin at the lateral epicondyle with 💪 extensor carpi ulnaris and 💪 extensor digiti minimi. The muscle is an antagonist to the flexor digitorum superficialis.
References
- Hale
And Coyle 1977
- 164: Rubens. (B). Back view. Supination.
- Wikipedia