Study Session 3: Pectoral Region & Breast Flash Cards
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Pile Management Card
Session 3: Pectoral Region & Breast
Session 3: Pectoral Region & Breast
| serratus anterior |
|
Origin ribs 1-8 or 9 Insertion medial border of the scapula on its costal (deep) surface it draws the scapula forward; the inferior fibers rotate the scapula superiorly Innervation long thoracic nerve (from ventral rami C5-C7) Arteries lateral thoracic a. Notes a lesion of long thoracic nerve will cause winging of the scapula (i.e., the medial border of the scapula falls away from the posterior chest wall and looks like an angel's wing) (Latin, serratus = to saw) |
| pectoralis minor |
|
Origin ribs 3-5 Insertion coracoid process of the scapula Action draws the scapula forward, medialward, and downward Innervation medial pectoral nerve (C8, T1) Arteries pectoral branch of the thoracoacromial trunk Notes branches of medial pectoral nerve usually pierce pectoralis minor to reach the pectoralis major muscle |
| pectoralis major |
|
Origin medial 1/2 of the clavicle, manubrium & body of sternum, costal cartilages of ribs 2-6, sometimes from the rectus sheath of the upper abdominal wall Insertion crest of the greater tubercle of the humerus Action flexes and adducts the arm, medially rotates the arm Innervation medial and lateral pectoral nerves (C5-T1) Arteries pectoral branch of the thoracoacromial trunk Notes the deep fascia on its anterior surface should not be fused to the fascia of the mammary gland - if it is, this is an important clinical sign indicating breast disease |
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