Coracobrachialis muscle
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2008-06-30T12:57:00Z
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{{Muscle infobox |
Name = Coracobrachialis muscle |
Latin = musculus coracobrachialis |
GraySubject = 124 |
GrayPage = 443 |
Image = Coracobrachialis.png |
Caption = Deep muscles of the chest and front of the arm, with the boundaries of the axilla. Coracobrachialis is shown in blue.|
Image2 = Gray1231.png |
Caption2 = Front of right upper extremity. (Coracobrachialis labeled at right, fourth from the bottom.) |
Origin = [[coracoid]] process of [[scapula]] |
Insertion = medial [[humerus]] |
Action = [[adducts]] [[humerus]] |
Blood = [[brachial artery]] |
Nerve = [[musculocutaneous nerve]] |
MeshName = |
MeshNumber = |
DorlandsPre = m_22 |
DorlandsSuf = 12548663 |
}}
The '''Coracobrachialis''' is the smallest of the three muscles that attach to the [[coracoid process]] of the [[scapula]]. (The other two muscles are [[pectoralis minor]] and [[biceps brachii]].) It is situated at the upper and medial part of the arm.
It is perforated by and innervated by the [[musculocutaneous nerve]].
==Origin and insertion==
It arises from the apex of the [[coracoid process]], in common with the short head of the [[Biceps brachii]], and from the [[intermuscular septum]] between the two muscles.
It is inserted by means of a flat tendon into an impression at the middle of the medial surface and border of the [[body of the humerus]] between the origins of the [[Triceps brachii]] and [[Brachialis]].
==Action==
The coracobrachialis draws the humerus forward (shoulder flexion) and towards the torso (shoulder adduction).
==Innervation==
The coracobrachialis muscle is innervated by the musculocutaneous nerve which arises from the anterior division of the upper (C5, C6) & middle trunks (C7) of the brachial plexus.
==Additional images==
<gallery>
Image:Gray202.png|Left scapula. Costal surface.
Image:Gray208.png|Left humerus. Anterior view.
Image:Gray809.png|The right brachial plexus (infraclavicular portion) in the axillary fossa; viewed from below and in front.
Image:Gray523.png|The axillary artery and its branches.
Image:Gray525.png|The brachial artery.
Image:Gray576.png|The veins of the right axilla, viewed from in front.
Image:Nerves_of_the_left_upper_extremity.gif|Nerves of the left upper extremity.
</gallery>
==External links==
* {{MuscleLoyola|cora}}
* {{GPnotebook|-758120371}}
* [http://www.ptcentral.com/muscles/musclearms.html#coracobrachialis PTCentral]
{{Gray's}}
{{Muscles_of_upper_limb}}
{{muscle-stub}}
[[Category:Muscles of the upper limb]]
[[ar:عضلة غرابية عضدية]]
[[ca:Múscul coracobraquial]]
[[cs:Hákový sval]]
[[de:Musculus coracobrachialis]]
[[es:Coracobraquial]]
[[fr:Muscle coracobrachial]]
[[hr:Kljunastonadlaktični mišić]]
[[id:Otot coracobrachialis]]
[[hu:Musculus coracobrachialis]]
[[nl:Musculus coracobrachialis]]
[[ja:烏口腕筋]]
[[pl:Mięsień kruczo-ramienny]]
[[pt:Músculo coracobraquial]]
[[sl:Pazdušna mišica]]
[[sv:Coracobrachialis]]
[[th:กล้ามเนื้อคอราโคบราคิอาลิส]]