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Should. & Upper Limb

Muscle Actions

TermDefinition
trapezius superior fibers: elevate and superiorly rotate scapula. middle fibers: retract scapula. inferior fibers: depress scapula.
levator scapulae elevates scapulae; inferiorly rotates scapula
rhomboids elevates and retracts scapula; inferiorly rotates scapula
pectoralis major agonist of arm flexion; also adducts and medially rotates arm
pectoralis minor medial rotation of glenohumeral joint/arm
serratus anterior agonist in scapula protaction; superiorly rotates scapula (so glenoid cavity oves superiorly); stabilizes scapula
latissimus dorsi agonist of arm extension; also adducts and medially rotates arm
rotator cuff collectively, these four muscles stabilize the glenohumeral joint
subscapularis medially rotates arm
supraspinatus abducts arm
infraspinatus adducts and laterally rotates arm
teres minor adducts and laterally rotates arm
Created by: ahasenmu