Subclavius muscle
3042683
222652730
2008-06-30T13:14:33Z
Vedran12
7322109
interwiki hr
{{Refimprove|date=March 2007}}
{{Muscle infobox |
Name = Subclavius muscle |
Latin = musculus subclavius |
GraySubject = 122 |
GrayPage = 438 |
Image = Gray411subclavius.png |
Caption = Deep muscles of the chest and front of the arm, with the boundaries of the [[axilla]]. (Subclavius visible at upper left, above first rib.) |
Origin = [[first rib]]|
Insertion = [[subclavian groove]] of [[clavicle]] |
Action = [[Depression (kinesiology)|depression of]] [[clavicle]] |
Blood = [[thoracoacromial artery]], clavicular branch |
Nerve = [[nerve to subclavius]] |
MeshName = |
MeshNumber = |
DorlandsPre = m_22 |
DorlandsSuf = 12550995 |
}}
The '''Subclavius''' is a small triangular muscle, placed between the [[clavicle]] and the [[first rib]]. Along with the pectoralis major and pectoralis minor muscles, the subclavius muscle makes up the anterior wall of the [[axilla]].<ref>Drake, Richard, et al. ''Gray's Anatomy For Students,'' Elsevier Inc., 2005</ref>
==Origin and insertion==
It arises by a short, thick tendon from the first rib and its cartilage at their junction, in front of the [[costoclavicular ligament]].
The fleshy fibers proceed obliquely lateralward and generally upward, to be inserted into the groove on the under surface of the clavicle between the [[costoclavicular]] and [[conoid ligament]]s.
==Action==
The Subclavius depresses the [[shoulder]], carrying it downward and forward. It draws the clavicle inferiorly as well as anteriorly.
The Subclavus protects the underlying [[brachial plexus]] and [[subclavian vessels]] from a broken [[clavicle]] - the most frequently broken [[long bone]].
==Variations==
Insertion into [[coracoid process]] instead of clavicle or into both clavicle and coracoid process. Sternoscapular fasciculus to the upper border of scapula. [[Sternoclavicularis]] from [[manubrium]] to clavicle between [[Pectoralis major]] and [[coracoclavicular fascia]].
==Additional images==
<gallery>
Image:Gray115.png|Anterior surface of sternum and costal cartilages.
Image:Gray201.png|Left clavicle. Inferior surface.
Image:Gray523.png|The axillary artery and its branches.
Image:Gray809.png|The right brachial plexus (infraclavicular portion) in the axillary fossa; viewed from below and in front.
</gallery>
==References==
<references />
==External links==
* {{MuscleLoyola|subc}}
* {{GPnotebook|530186318}}
* [http://www.ptcentral.com/muscles/muscletrunk.html#subclavius PTCentral]
{{Gray's}}
{{Muscles_of_upper_limb}}
[[Category:Muscles of the upper limb]]
{{muscle-stub}}
[[ar:عضلة تحت ترقوية]]
[[de:Musculus subclavius]]
[[es:Músculo subclavio]]
[[fr:Muscle sous-clavier]]
[[hr:Potključni mišić]]
[[id:Otot subclavius]]
[[he:השריר התת בריחי]]
[[hu:Kulcscsont alatti izom]]
[[ja:鎖骨下筋]]
[[pl:Mięsień podobojczykowy]]
[[pt:Músculo subclávio]]
[[sl:Podključnična mišica]]