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Shoulder Girdle

Muscle origin, insertion, innervation, action and unique charcterstics

QuestionAnswer
Trapezius Origin occipital protuberance, ligumentum nuchae, spinous process of C7-T12
Trapezius Insertion spine of scapula, acromion, lateral 1/3 of clavicle
Trapezius innervation spinal accessory nerve (CNXI), C3-C4
Trapezius Action Upper: elevate scapula Middle: retract scapula lower: Depress Scapula Upper and Lower: upward rotation of scapula
Levator Scapulae Origin Transverse process of C1-4
Levator Scapulae Insertion Superior angle and proximal medial scapula
Levator Scapulae Innervation C3-4, Dorsal Scapular Nerve (C5)
Levator Scapulae Action Elevate scapula, laterally flex C-spine, Downwardly rotate scapula
Rhomboids Origin spinous process of C7-T1-5
Rhomboids Insertion Vertebral border of the scapula
rhomboids innervation dorsal scapular nerve (C4-5)
rhomboids action elevate, retract, and downwardly rotate scapula.
Pectoralis Minor Origin Anterior Ribs 3-5
Pectoralis Minor Insertion Coracoid process of scapula
Pectoralis Minor Innervation Medial Pectoral Nerve (C6-8, T1)
Pectoralis Minor Action Depress, protract, and downwardly rotate scapula.
Serratus Anterior Origin Anterior Lateral Ribs 1-8
Serratus Anterior insertion Medial border of anterior surface of the scapular
Serratus Anterior Innervation Long thoracic nerve (C5-7)
Serratus Anterior Action Protracts, depresses, and upwardly rotates scapula
Created by: user-1988504
 

 



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