Muscle
Extensor digiti minimi
Extends the little finger
High-yield
Independent extensor of the 5th digit; posterior interosseous nerve.
Overview
A slender extensor that independently extends the little finger, supplied by the posterior interosseous nerve.
Reference facts
- Origin
- Lateral epicondyle of the humerus (common extensor origin)
- Insertion
- Extensor expansion of the little finger
- Action
- Extends the little finger at the MCP and IP joints
- Innervation
- Posterior interosseous nerve (C7, C8)
- Blood supply
- Posterior interosseous artery
Frequently asked questions
What does the extensor digiti minimi do?
The extensor digiti minimi extends the little finger at the MCP and IP joints.
What nerve innervates the extensor digiti minimi?
The extensor digiti minimi is innervated by the posterior interosseous nerve (C7, C8).
Where does the extensor digiti minimi attach?
The extensor digiti minimi originates from the lateral epicondyle of the humerus (common extensor origin) and inserts on the extensor expansion of the little finger.
What is the blood supply of the extensor digiti minimi?
The extensor digiti minimi is supplied by the posterior interosseous artery.