Pectoralis minor muscle
|Latin||musculus pectoralis minor|
|Gray's||subject #122 438|
|Origin:||3rd to 5th ribs, near their costal cartilages|
|Insertion:||medial border and superior surface of the coracoid process of the scapula|
|Artery:||Pectoral branch of the thoracoacromial trunk|
|Nerve:||Medial pectoral nerves (C8, T1)|
|Action:||It stabilizes the scapula by drawing it inferiorly and anteriorly against the thoracic wall.|
Origin and insertion
The Pectoralis minor depresses the point of the shoulder, drawing the scapula downward and medialward toward the thorax, and throwing the inferior angle backward.
Origin from second, third and fourth or fifth ribs. The tendon of insertion may extend over the coracoid process to the greater tubercle. May be split into several parts. Absence rare.
- LUC pcmn
- UWASH pectoralisminor
- 13631566 at GPnotebook
- SUNY Figs 04:04-05
- SUNY Figs 05:02-08
- SUNY Labs 05:ov-0200
- SUNY Labs 05:01-0102
- Muscles/PectoralisMinor at exrx.net
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.