Mușchiul opozant al degetului mic

Mușchiul opozant al degetului mic (săgeata)

Mușchiul opozant al degetului mic (Musculus opponens digiti minimi) sau opozantul degetului mic este un mușchi mic triunghiular al eminenței hipotenare a mâinii. Este cel mai profund mușchi al eminenței hipotenare, aflat sub mușchiul flexor scurt al degetului mic al mâinii și mușchiul abductor al degetului mic al mâinii.


Acest muschi este cunoscut si ca cel mai puternic muschi din corp deoarece asa este.

Inserții

Are originea pe retinaculul flexorilor și pe cârligul osului cu cârlig (Hamulus ossis hamati).

Se inseră pe toată întinderea marginii mediale (= ulnare) a osului metacarpian V.

Raporturi

Este cel mai profund mușchi al regiunii hipotenare și este acoperit de mușchiul flexor scurt al degetului mic al mâinii (Musculus flexor digiti minimi brevis manus) și mușchiul abductor al degetului mic al mâinii (Musculus abductor digiti minimi manus).

Acoperă marginea ulnară și suprafața palmară adiacentă a metacarpianul V și al treilea mușchi interosos palmar (Musculus interosseus palmaris).

Acțiune

Este flexor al degetului mic (mișcând metacarpianul V înainte și rotindu-l lateral) și abductor al lui, apropiind metacarpianul V de axul mâinii (sau de degetul mijlociu) ca mușchii interosoșii și schițează o mișcare de opoziție a degetului mic față de police. Acțiunea sa de rotație laterală asupra metacarpianului V este contestată.

Inervația

Inervația este asigurată de ramura profundă a nervului ulnar (Ramus profundus nervi ulnaris) (neuromer CVIII –Th1).

Vascularizația

Vascularizația este asigurată de ramura palmară profundă a arterei ulnare (Ramus palmaris profundus arteriae ulnaris) și de ramuri ale arcului palmar profund (Arcus palmaris profundus).

Bibliografie

  • Victor Papilian, Tratat elementar de anatomie descriptivă și topografică (cu aplicațiuni medico-chirurgicale), Ediția III-a, Vol. I. Generalități, osteologie, artrologie, miologie. Sibiu, editura "Dacia Traiana" S. A. 1942
  • Victor Papilian, Anatomia omului, Volumul I – Aparatul locomotor, Ediția a XI-a, revizuită integral de prof. univ. dr. Ion Albu, Editura ALL, 2006
  • Z. Iagnov, E. Repciuc, I. G. Russu, Anatomia omului. Aparatul locomotor, Editura Medicală, București, 1962
  • Viorel Ranga, Anatomia omului, vol. 2 - Membrele, Editura CERMA, 2002
  • Mihail Ștefaneț, Anatomia omului. Volumul I, Chișinău, Centrul Editorial-Poligrafic Medicina, 2007


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Lista mușchilor membrului superior
Mușchii umărului
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Mușchii brațului
Mușchii anteriori
Mușchii posteriori
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Alte
Mușchii antebrațului
Mușchii anteriori
Mușchii posteriori
Mușchii laterali
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Alte
Mușchii mâinii
Mușchii eminenței tenare
Mușchii eminenței hipotenare
Mușchii regiunii palmare mijlocii
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