Flexor digiti minimi brevis
From Ganfyd
| Flexor digiti minimi brevis | |
|---|---|
 | |
| System: | Muscle |
| Function: | Flexes the proximal phalanx of the little finger |
| Origin: | Flexor retinaculum and hook of hamate |
| Branches: | |
| Insertion: | Medial side of base of proximal phalanx of the little finger |
| Arterial supply: | |
| Venous drainage: | |
| Lymphatic drainage: | |
| Innervation: | Deep terminal branch of the ulnar nerve (C8, T1) |
| Vertebral levels: | |
| Search for Flexor digiti minimi brevis in Gray's. | |
Flexor digiti minimi brevis (flexor digiti minimi, flexor digiti quinti brevis) is a muscle of the hypothenar eminence that acts as a flexor of the little finger.
Contents |
Shape
Flexor digiti minimi brevis lies on the lateral side of abductor digiti minimi, separated by the deep branch of the ulnar nerve and the deep palmar branch of the ulnar artery.
Actions
- Flexes the proximal phalanx of the little finger
Joints Affected
Origin
- Convex surface of the hook of hamate
- Palmar surface of the extensor retinaculum
Insertion
- Medial side of base of proximal phalanx of the little finger
Nerve Supply
Relations
Variations
- Flexor digiti minimi longus is a rare anatomical variation in which the muscle arises from the distal quarter of the superficial flexor compartment, its tendons running across the ulnar nerve and ulnar artery to reach the hypothenar eminence
- May be attenuated or absent, in which case abductor digiti minimi is larger in size
