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Origins Insertions And Actions Of Muscles

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kohelubi's version from 2016-11-09 21:44

Origins Insertions And Actions of Muscles of the Shoulder

 

MuscleOriginInsertionActionNerve
Upper trapeziusOccipital bone, nuchal ligament on upper cervical spinous processeslateral 3rd of clavicle and acromion processScapular elevation and upward rotationspinal accessory, C3 and C4 sensory component
Middle trapeziusspinous processes of C7-T3scapular spinescapular retractionspinal accessory, C3 and C4 sensory component
Lower trapeziusspinous processes of T6-T12base of scapular spinescapular depression and upward rotationspinal accessory, C3 and C4 sensory component
Levator ScapulaeTransverse processes of C1-C4vertebral border of scapula between superior angle and spinescapular elevation and downward rotationC3 C4, and dorsal scapular nerve
Rhomboid majorSpinous Process of T2-T5Medial border of scapula between spine and inferior anglescapular elevation, retraction, and downward rotationdorsal scapular nerve
Rhomboid minorSpinous Processes of C7-T1Medial Border of scapula at level of spinescapular elevation, retraction and downward rotationdorsal scapular nerve
Serratus AnteriorLateral aspect of upper 8 ribsanterior surface of vertebral border of scapulascapular protraction and upward rotationlong thoracic nerve
Pectoralis minorAnterior aspect of ribs 3-5coracoid process of scapulascapular depression, protraction, downward rotation, and tiltmedial pectoral nerve
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