Day 10 Pectoralis Major, Pectoralis Minor,Intercostals and Serratus Anterior
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Pectoralis Major
Origin: Medial 1/2 of clavicle sternum, and cartilage of ribs 1-6. Insertion: Crest of tubercle of Humerus (medial) Action: Adducts, horizontally flexes, rotates arm medially
Pectoralis Minor
Origin: Ribs 3-5 Insertion: Coracoid Process of Scapula Action: Depresses Scapula, abducts Scapula, tilts Scapula anteriorly, assists in forced inhalation.
