Palmaris brevis muscle
| Palmaris brevis muscle | |
|---|---|
The muscles of the left hand. Palmar surface (palmaris brevis visible at center left).
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| Details | |
| Latin | Musculus palmaris brevis |
| Origin | Flexor retinaculum (medial) and palmar aponeurosis |
| Insertion | Palm |
| Palmar metacarpal artery | |
| Superficial branch of ulnar nerve | |
| Actions | Pulls on skin over hypothenar eminence, deepening the cup of the palm and so improving grip |
| Identifiers | |
| Dorlands /Elsevier |
m_22/12550063 |
| TA | Lua error in Module:Wikidata at line 744: attempt to index field 'wikibase' (a nil value). |
| TH | {{#property:P1694}} |
| TE | {{#property:P1693}} |
| FMA | {{#property:P1402}} |
| Anatomical terms of muscle
[[[d:Lua error in Module:Wikidata at line 863: attempt to index field 'wikibase' (a nil value).|edit on Wikidata]]]
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Palmaris brevis is a thin, quadrilateral muscle, placed beneath the integument of the ulnar side of the hand.[1] It acts to fold the skin of the hypothenar eminence transversally.
Contents
Origin and insertion
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,[1] and occasionally on the pisiform.[2]
Action
It tenses the skin of the palm on the ulnar side during a grip action,[2] and deepens the hollow of the palm.[3]
Innervation
It is the only muscle innervated by the superficial branch of the ulnar nerve (C8, T1).[3]
Blood supply
It is supplied by the palmar metacarpal artery of the deep palmar arch.
See also
Additional images
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References
This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)
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