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Anatomy Quiz2


Pectoralis Major - Proximal Attachment clavicular head: anterior surface of medial half of clavicle sternocostal head: anterior surface of sternum, superior 6 costal cartilages, & aponeurosis of the external oblique
Pectoralis Major - Distal Attachment lateral lip of the Intertubercular sulcus of the humerus
Pectoralis Major - Innervation lateral and medial pectoral nerves; clavicular head C5, C6; sternocostal head C7, C8, T1
Pectoralis Major - Main Action adducts and medially rotates humerus: draws scapula anteriorly and inferiorly; clavicular head flexes humerus & sternocostal head extends humerus
Pectoralis Minor - Proximal Attachment 3rd - 5th ribs near their costal cartilages
Pectoralis Minor - Distal Attachment medial border and superior surface of the coracoid process of the scapula
Pectoralis Minor - Innervation medial pectoral nerve C8, T1
Pectoralis Minor - Main Action stabilizes scapula by drawing it anteriorly and inferiorly to the thoracic wall
Subclavius - Proximal Attachment junction of the 1st rib and its costal cartilage
Subclavius - Distal Attachment inferior surface of the clavicle
Subclavius - Innervation nerve to the subclavius C5, C6
Subclavius - Main Action anchors and depresses clavicle
Serratus Anterior - Proximal Attachment external surface of the 1st - 8th ribs
Serratus Anterior - Distal Attachment medial boarder of the scapula
Serratus Anterior - Innervation long thoracic nerve C5, C6 ,C7
Serratus Anterior - Main Action rotates and protracts scapula and holds it against the thoracic wall
Trapezius - Proximal Attachment medial third of superior nuchal line; external occipital protuberance; nuchal ligament; spinous processes of C7- T12 vertebra
Trapezius - Distal Attachment lateral third of clavicle; acromion and spine of scapula
Trapezius - Innervation Spinal accessory nerve and spinal nerves C3, C4
Trapezius - Muscle Action elevates, depresses, and middle part retracts scapula; rotate glenoid cavity superiorly
Created by: MandaRod