EXSS 12100 Lecture Notes - Lecture 6: Latissimus Dorsi Muscle, Levator Scapulae Muscle, Rhomboid Major Muscle

• School: Ithaca College
• Department: Exercise and Sport Sciences (EXSS)
• Course: EXSS 12100
• Professor: Tom Swensen

Document Summary

Muscles acting on shoulder girdle: elevate scapula. Serratus anterior (lower fibers: medially rotate scapula. Serratus anterior (upper fibers: adduct scapula. Pectoralis minor: hold scapula against thoracic wall (fixing scapula during upper extremity movements) Rhomboideus minor: muscles that work together as accessory inspiratory muscles when scapula is fixed. Serratus anterior: steadies clavicle during movements of shoulder. Subclavius: innervated by cranial nerve xi, spinal accessory. Anterior part of deltoid: extend brachium. Posterior part of deltoid: abduct brachium. Subscapularis: depress a raised upper extremity against resistance. Sternocostal part of pectoralis major: form triangle of auscultation . Trapezius: stabilize shoulder joint- pull is in line with long axis of humerus. Coracobrachialis: stabilize shoulder during movement- hold head of humerus to glenoid cavity of scapula. Latissimus dorsi: innervated by pectoral nerve. Pectoralis major: innervated by musculocutaneous nerve. Muscles acting on the elbow and radio-ulnar joints: flex the antebrachium. Anconeus (assists triceps brachii: supinate the antebrachium. Innervated by the radial nerve or one of its branches.