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]]