The extensor muscle of the little finger is a superficial muscle of the posterior region of the forearm, placed medially in relation to the common extensor muscle of the fingers.
It originates along with this muscle from the posterior aspect of the humeral epicondyle and from the antibrachial fascia. Cross the 5th dorsal carpal ligament duct and merge with the common extensor finger tendon at the 5th metacarpal level.
With its action it extends the 5th finger and collaborates in dorsal flexion and ulnar abduction of the hand. Sometimes this muscle is absent and in these cases its function is performed by the common extensor muscle of the fingers.
It is innervated by the radial nerve (C6-C8). It is sprayed from the common interosseous artery.
| ORIGIN Common to the common finger extensor: from the posterior aspect of the humeral epicondyle and from the antibrachial fascia |
| INSERTION It melts with the tendon of the common extensor of the fingers at the level of the 5th metacarpal |
| ACTION extends the 5th finger and collaborates in dorsal flexion and ulnar abduction of the hand |
| INNERVATION radial nerve (C6-C8) |
| Upper limb | Lower limb | Trunk | Abdomen | Articles |
