系统解剖学英文版上肢肌Myology.ppt

Muscles of upper limb 上肢肌 Muscles of shoulder上肢带肌 ★Components: Deltoid 三角肌 Supraspinatus 冈上肌 Infraspinatus 冈下肌 Teres minor 小圆肌 Teres major 大圆肌 Subscapularis 肩胛下肌 Major muscles of upper limb ★Deltoid 三角肌 Origin: lateral third of clavicle, acromion, and spine of scapula Insertion: deltoid tuberosity of humerus Action: abducts the arm，anterior fibers flex and medially rotate arm; posterior fibers extend and laterally rotate arm Major muscles of upper limb ★ Teres major 大圆肌 Origin: dorsal surface of inferior angle of scapula Insertion: crest of lesser tubercle of humerus Action: medially rotates and adducts arm Major muscles of upper limb Trilateral and quadrilateral foramina 三边孔和四边孔 Between the subscapularis/ teres minor and teres major, there is a long triangular space whose lateral side is surgical neck of humerus. The long head of triceps brachii subdivides this space into a medial trilateral foramen and a lateral quadrilateral foramen. Circumflex scapular a. and v.旋肩胛动、静脉pass through the trilateral foramen Axillary n. 腋神经, Posterior humeral circumflex a. 旋肱后动、静脉 pass through the quadrilateral foramen Muscles of arm Antererior group Biceps brachii 肱二头肌 Coracobrachialis 喙肱肌 Brachialis 肱肌 Posterior group Triceps brachii 肱三头肌 Major muscles of upper limb ★ Biceps brachii 肱二头肌 Origin: long head: supraglenoid tubercle; short head: coracoid process Insertion: radial tuberosity Action: flexor of elbow joint, supinator of forearm, weak flexor of should joint Major muscles of upper limb Major muscles of upper limb ★ Triceps brachii 肱三头肌 Origin: long head: infraglenoid tubercle lateral head: above groove for radical n. medical head: below groove for radical n. Insertion: olecranon of ulna Action: extends elbow joint; long head can extend and adduct shoulder joint Major muscles of upper limb Muscles of forearm ★ Antererior group (9) First (superficial) layer (5) Brachioradialis 肱桡肌 Pronator teres 旋前圆肌 Flexor carpi radialis 桡侧腕屈肌 Palmaris longus 掌长肌 Flexor