Palmar interossei muscles

Palmar interossei muscles

Muscle infobox
Name = Palmar interossei muscles
Latin = musculi interossei palmares
GraySubject = 126
GrayPage = 465


Caption = The Interossei volares of left hand.
Origin = metacarpals
Insertion = proximal phalange
Action = adduction
Antagonist = Dorsal interossei of the hand
Blood =
Nerve = deep branch of ulnar nerve
MeshName =
MeshNumber =
DorlandsPre = m_22
DorlandsSuf = 12549407
The palmar interossei (interossei volares) are small muscles in the hand that lie on the anterior aspect of the metacarpals. They are smaller than the dorsal interossei of the hand, which lie "between" the metacarpals.

tructure

Each palmar interosseous muscle arises from the entire length of the metacarpal bone of one finger, and is inserted into the side of the base of the proximal phalanx and extensor expansion of the extensor digitorum tendon to the same finger.

There are three palmar interossei:

The palmar interossei are unipennate.

From this account it may be seen that each finger is provided with two interossei, with the exception of the little finger, in which the abductor digiti minimi muscle takes the place of one of the pair.

Some texts consider the medial head of the flexor pollicis brevis to be a palmar interosseous muscle. This muscle would then be considered the first palmar interosseous muscle, and the total number of palmar interosseous muscles in the hand would be four.

Innervation

All of the interosseous muscles of the hand are innervated by the deep branch of the ulnar nerve.

Actions

The palmar interosseous muscles "adduct" the fingers towards the middle finger. This is in contrast to the dorsal interossei, which "abduct" the fingers away from the middle finger. The interossei also assist the lumbricals.

Pollical Palmar Interosseous Muscle (of Henle, PPIM)

It is currently accepted that more than 80% of individuals present a pollical palmar interosseous muscle (of the thumb) as suggested by Henle's description in 1858 and verified by numerous investigations such as those carried out by Randall S. Susman, Lukhanyo Nyati, and Mandeep S. Jassal. [Susman RS, Nyati L, Jassal MS. Observations on the pollical palmar interosseous muscle (of Henle). Anat Rec. 1999 Feb 1;254(2):159-65. PMID 9972800 ]

ee also

* Plantar interossei muscles
* Dorsal interossei of the foot
* Dorsal interossei of the hand

References

External links

*
*
*
*
*
* [http://www.ptcentral.com/muscles/musclearms.html#palmar%20interossei PTCentral]


Wikimedia Foundation. 2010.

Игры ⚽ Нужна курсовая?

Look at other dictionaries:

  • interossei muscles palmar — musculi interossei palmares …   Medical dictionary

  • Interossei — refer to muscles between the bones. Specific interossei include: * Upper limbs ** Dorsal interossei muscles (hand) ** Palmar interossei muscles * Lower limbs ** Dorsal interossei muscles (foot) ** Plantar interossei muscles …   Wikipedia

  • List of muscles of the human body — Skeletal muscles homo sapiens Muscles of the human body: Overview Head  |  Neck  |&# …   Wikipedia

  • Dorsal interossei of the hand — For the muscles of the foot, see Dorsal interossei muscles (foot). Dorsal interossei of the hand The Interossei dorsales of left hand. Latin musculi interossei dorsales manus …   Wikipedia

  • Dorsal interossei of the foot — Dorsal interossei muscles The Interossei dorsales. Left foot. Latin musculi interossei dorsalis pedis Gray s …   Wikipedia

  • Interosseous muscles of the hand — The interosseous muscles of the hand are muscles found near the metacarpal bones that help to control the fingers. They are considered voluntary muscles. They are generally divided into two sets: * 4 Dorsal interossei * 3 Palmar interossei …   Wikipedia

  • musculi interossei palmares — [TA] palmar interosseous muscles (3): origin, sides of second, fourth, and fifth metacarpal bones; insertion, bases of proximal phalanges and corresponding extensor expansions of second, fourth, and fifth fingers; innervation, ulnar; action,… …   Medical dictionary

  • interosseous muscles palmar — musculi interossei palmares …   Medical dictionary

  • Muscle — is the tissue of the body which primarily functions as a source of power. There are three types of muscle in the body. Muscle which is responsible for moving extremities and external areas of the body is called "skeletal muscle." Heart… …   Medical dictionary

  • Contrahens — The contrahentes (singular contrahens) are muscles widely present in the hands of mammals, including monkeys and gorillas.[1] They are on the palmar/plantar side. There is one each for digits I II IV V but not III. They pull the fingers/toes down …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”