| Palmaris brevis muscle | |
|---|---|
| The muscles of the left hand. Palmar surface. (Palmaris brevis visible at center left.) | |
| Latin | musculus palmaris brevis |
| Gray's | subject #126 463 |
| Origin | flexor retinaculum (medial), palmar aponeurosis |
| Insertion | palm |
| Artery | |
| Nerve | superficial branch of ulnar nerve |
| Actions | pulls on skin over hypothenar eminence, deepening the cup of the palm and so improving grip |
The Palmaris brevis is a thin, quadrilateral muscle, placed beneath the integument of the ulnar side of the hand. It acts to fold the skin of the hypothenar eminence transversally.
It arises by tendinous fasciculi from the transverse carpal ligament and palmar aponeurosis; the fleshy fibers are inserted into the skin on the ulnar border of the palm of the hand.
The muscle is innervated by the superficial branch of the ulnar nerve , containing fibers from the eighth cervical and first thoracic nerves.
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.
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