Palmaris brevis muscle

From Wikipedia, the free encyclopedia
  (Redirected from Palmaris brevis)
Jump to: navigation, search
Palmaris brevis muscle
Musculuspalmarisbrevis.png
The muscles of the left hand. Palmar surface (palmaris brevis visible at center left).
Details
Latin Musculus palmaris brevis
Flexor retinaculum (medial) and palmar aponeurosis
Palm
Superficial branch of ulnar nerve
Actions Pulls on skin over hypothenar eminence, deepening the cup of the palm and so improving grip
Identifiers
Gray's p.463
Dorlands
/Elsevier
m_22/12550063
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]

Action[edit]

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[edit]

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.[2]

See also[edit]

Additional images[edit]

The palmar aponeurosis 

References[edit]

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 c "Palmaris brevis". PT Central. 1998. Retrieved February 2012. 
  3. ^ a b "Palmaris brevis muscle". Retrieved February 2012.