Pectoralis Minor

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Original Author(s): Oliver Jones
Last updated: October 7, 2022
Revisions: 4

Original Author(s): Oliver Jones
Last updated: October 7, 2022
Revisions: 4

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The pectoralis minor is a muscle of the anterior chest wall. It lies underneath the larger pectoralis major and contributes to the anterior wall of the axilla.

  • Attachments: Originates from the 3rd-5th ribs and inserts into the coracoid process of the scapula.
  • Function: Stabilises the scapula by drawing it anteroinferiorly against the thoracic wall.
  • Innervation: Medial pectoral nerve.
  • Blood supply: Pectoral branch of thoracoacromial artery.

Fig 1 – The serratus anterior and pectoralis minor muscles.