Pectoralis minor
Human chest muscle that protracts the shoulder / From Wikipedia, the free encyclopedia
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Pectoralis minor muscle (/ˌpɛktəˈrælɪs ˈmaɪnər/) is a thin, triangular muscle, situated at the upper part of the chest, beneath the pectoralis major in the human body. It arises from ribs III-V; it inserts onto the coracoid process of the scapula. It is innervated by the medial pectoral nerve. Its function is to stabilise the scapula by holding it fast in position against the chest wall.
Quick Facts Details, Origin ...
Pectoralis minor | |
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Details | |
Origin | Third to fifth ribs, near the costochondral junction |
Insertion | Medial border and superior surface of the coracoid process of the scapula |
Artery | Pectoral branch of the thoracoacromial trunk |
Nerve | Medial pectoral nerve (C8) |
Actions | Stabilizes the scapula by drawing it inferiorly and anteriorly against the thoracic wall, raises ribs in inhalation |
Identifiers | |
Latin | musculus pectoralis minor |
TA98 | A04.4.01.006 |
TA2 | 2305 |
FMA | 13109 |
Anatomical terms of muscle |
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