Muscolo coracobrachiale

Coracobrachiale
Muscoli profondi del torace e della faccia anteriore del braccio, con i limiti dell'ascella. Il muscolo coracobrachiale è mostrato in blu.
Faccia anteriore dell'estremità superiore destra. (Coracobrachiale mostrato a destra, quarto dal basso.)
Anatomia del Gray(EN) Pagina 443
Nome latinomusculus coracobrachialis
SistemaSistema muscolare
Origineprocesso coracoideo
Inserzioneterzo medio dell'omero
Azioniflessione e adduzione dell'omero
Arteriaarteria circonflessa anteriore omerale e arteria brachiale
Nervonervo muscolocutaneo (C5–C7)
Identificatori
TAA04.6.02.017
FMA37664
Visione dal basso. Muscolo in rosso. Le coste non sono mostrate.

Il muscolo coracobrachiale è il più piccolo di tre muscoli che prendono origine dal processo coracoideo della scapola (gli altri due muscoli sono il piccolo pettorale,che però si inserisce e non origina dal suddetto punto, e il bicipite brachiale). È situato nella parte supero-mediale del braccio.

È perforato ed innervato dal nervo muscolocutaneo.

Origine ed inserzione

Origina dall'apice del processo coracoideo, in comune con il capo breve del muscolo bicipite brachiale, e dal setto intermuscolare compreso tra i due muscoli.

Si inserisce per mezzo di un tendine piatto in un solco del terzo medio della faccia anteromediale del corpo dell'omero, tra le origini del bicipite brachiale e brachiale.

Azione

Il muscolo coracobrachiale causa la flessione, e l'adduzione del braccio.

Innervazione

Il muscolo coracobrachiale è innervato dal nervo muscolocutaneo che origina dai rami di divisione anteriore dei tronchi superiori (C5, C6) e medi (C7) del plesso brachiale.Dal punto di vista della radice, però, nella maggior parte dei casi, l’innervazione viene da C7. Nelle lesioni avulsive C5-C6 del plesso brachiale, infatti, il piccolo ramo in uscita dal muscolocutaneo per questo muscolo è sovente funzionante alla stimolazione elettrica.

Altri progetti

  Portale Medicina: accedi alle voci di Wikipedia che trattano di medicina

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