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Stack #145398

Axioappendicular and Glenohumeral Muscles of Upper Limb

QuestionAnswer
Pectoralis major: Origin Anterior surface of medial half of clavicle; anterior surface of sternum, supreior 6 costal cartilages, aponeurosis of external oblique
Pectoralis major: Insertion Medial border and superior surface of coracoid process of scapula
Pectoralis major: Innervation Lateral and medial pectoral nerves
Pectoralis major: Main action Medially rotates and adducts humerus, draws scapula anteriorly and inferiorly
Pectoralis minor: Origin Medial border and superior surface of coracoid process of scapula
Pectoralis minor: Insertion 3rd to 5th ribs
Pectoralis minor: Innervation Medial pectoral nerve
Pectoralis minor: Main action Stabilizes scapula, draws inferior and anterior
Subclavius: Origin Junction of 1st rib and cartilage
Subclavius: Insertion Inferior surface of middle third of clavicle
Subclavius: Innervation Nerve to subclavius
Subclavius: Main action Anchors and depresses clavicle
Serratus anterior: Origin External surfaces of lateral parts of 1st-8th ribs
Serratus anterior: Insertion Anterior surface of medial border of scapula
Serratus anterior: Innervation Long thoracic nerve
Serratus anterior: Main action Protracts scapula and holds it against thoracic wall, rotates scapula
Trapezius: Origin Medial third of superior nuchal line, external occipital protuberance, nuchal ligament, SP of C7-T12
Trapezius: Insertion Lateral third of clavicle, acromion and spine of scapula
Trapezius: Innervation Spinal accessory nerve (CN XI); C3 and C4 for proprioceptive fibers
Trapezius: Main action Elevates, depresses and retracts scapula; act together to rotate glenoid cavity superiorly
Latissimus dorsi: Origin SP of T6-T12, thoracolumbar fascia, iliac crest, and inferior 3/4 ribs
Latissimus dorsi: Insertion Floor of intertubercular groove of humerus
Latissimus dorsi: Innervation Thoracodorsal nerve
Latissimus dorsi: Main action Extends, adducts, and medially rotates humerus
Levator scapulae: Origin Posterior tubercles of TP of C1-C4
Created by: sora