Palmaris brevis

Palmaris brevis muscle
The muscles of the left hand. Palmar surface (palmaris brevis visible at center left).
Details
Origin	Flexor retinaculum (medial) and palmar aponeurosis
Insertion	Palm
Artery	Palmar metacarpal artery
Nerve	Superficial branch of ulnar nerve
Actions	Pulls on skin over hypothenar eminence, deepening the cup of the palm and so improving grip
Identifiers
Latin	Musculus palmaris brevis
TA	A04.6.02.053
FMA	37381
Anatomical terms of muscle []

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 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, and occasionally on the pisiform.

It tenses the skin of the palm on the ulnar side during a grip action, and deepens the hollow of the palm.

It is the only muscle innervated by the superficial branch of the ulnar nerve (C8, T1).

It is supplied by the palmar metacarpal artery of the deep palmar arch.

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)