Palmaris brevis muscle

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Palmaris brevis muscle
The muscles of the left hand. Palmar surface (palmaris brevis visible at center left).
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
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.[1] It acts to fold the skin of the hypothenar eminence transversally.

Origin and insertion[edit]

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]


It tenses the skin of the palm on the ulnar side during a grip action,[2] and deepens the hollow of the palm.[3]


It is the only muscle innervated by the superficial branch of the ulnar nerve (C8, T1).[3]

Blood supply[edit]

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

See also[edit]

Additional images[edit]

The palmar aponeurosis 


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

  1. ^ a b Gray's Anatomy (1918, see infobox)
  2. ^ a b "Palmaris brevis". PT Central. 1998. Retrieved February 2012.  Check date values in: |access-date= (help)
  3. ^ a b "Palmaris brevis muscle". Retrieved February 2012.  Check date values in: |access-date= (help)