vates trunk.РErector spinae? Position: fills the vertebral groove on each side of the spine? Action: extends vertebral column (draw head backwar)РPectoralis major?Origin: medial half of clavicle,sternum,1th-6th costal cartilages.?Insertion: crest of greater tubercle of humerus.?Action: flexes, adducts and rotates arm medially; arm fixed, elevates trunk; elevates ribs 1-6,aidding in forced inspiration.РThe Muscles of Upper LimbРMuscles of shoulder?Deltoid?supraspinatus?Infraspinatus?Teres minor?Teres major?subscapularisРMuscles of arm?Antererior group?Biceps brachii 肱二头肌?Coracobrachialis喙肱肌?Brachialis 肱肌РPosterior group – triceps brachii肱三头肌РMuscles of forearmРSuperficial layer?Brachioradialis 肱桡肌?Pronator teres 旋前圆肌?Flexor carpi radialis 桡侧腕屈肌?Palmaris longus 掌长肌?Flexor carpi ulnaris 尺侧腕屈肌
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