Palmaris brevis muscle

Source: Wikipedia, the free encyclopedia.
Palmaris brevis muscle
Palmar metacarpal artery
NerveSuperficial branch of ulnar nerve
ActionsPulls on skin over hypothenar eminence, deepening the cup of the palm and so improving grip
Identifiers
Latinmusculus palmaris brevis
TA98A04.6.02.053
TA22520
FMA37381
Anatomical terms of muscle]

Palmaris brevis muscle 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.

Structure

Origin and insertion

Palmaris brevis muscle is located on the

transverse carpal ligament and palmar aponeurosis. The muscle fibres are inserted into the skin on the ulnar border of the palm of the hand,[1] and occasionally on the pisiform bone.[3]

Innervation

Palmaris brevis muscle is the only muscle innervated by the

superficial branch of the ulnar nerve (C8, T1).[2]

Blood supply

Palmaris brevis muscle is supplied by the

palmar metacarpal artery of the deep palmar arch
.

Discovery

The first recorded observation of the muscle is by Italian anatomist Giambattista Canano sometime before 1543. The muscle was independently discovered a few years later by Realdo Colombo before being pushed to general acceptance in the works of Andreas Vesalius.[4]

Function

Palmaris brevis muscle tenses the skin of the palm on the ulnar side during a grip action.

fatigue-resistant fiber type profile, which supports the idea of a protective function to the ulnar neurovasculature during repetitive intermittent grasping tasks.[7]

See also

Additional images

  • The palmar aponeurosis
    The palmar aponeurosis

References

Public domain This article incorporates text in the public domain from page 463 of the 20th edition of Gray's Anatomy (1918)

  1. ^
    OCLC 213447727.{{cite book}}: CS1 maint: others (link
    )
  2. ^
    ISBN 978-0-323-28683-1
    , retrieved 2021-01-07
  3. ^ a b "Palmaris brevis". PT Central. 1998. Archived from the original on 4 February 2012. Retrieved 25 February 2012.
  4. ISBN 978-1-118-52425-1
    . Retrieved 2021-05-05.
  5. ^ "palmaris brevis muscle (anatomy) - General Practice Notebook". gpnotebook.com. Retrieved 2021-01-07.
  6. PMID 28786108
    .
  7. PMID 28620932
    .
Retrieved from "https://en.wikipedia.org/w/index.php?title=Palmaris_brevis_muscle&oldid=1192718647"