Quizlet Pectoral Girdle Muscles

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  1. PECTORALIS MAJOR: Protracts and depresses scapula. Medial pectoral nerve.
  2. SERRATUS ANTERIOR: Protracts and stabilizes scapula. Long thoracic nerve.
  3. TRAPEZIUS: Elevates clavicle; elevates, retracts, and rotates scapula; depresses, extends head. Accessory nerve (CNXI).