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Muscles of upper ext

Muscles of upper extremities

MuscleAction
Upper Trapezius Elevation and upward rotation of scapula
Middle Trapezius Pulls scapula medially
Lower Trapezius Depression and upward rotation of scapula
Rhomboid Major Retracts and rotates scapula downward
Rhomboid Minor Retracts and rotates scapula downward
Levator Scapulae Elevation of scapula and moves neck laterally
Pectoralis Minor Forward rotation and depression of scapula
Serratus Anterior Stabilization, upward rotation and protraction of the scapula
Pectoralis Major (clav.) Add. horizontal add. medial rotation and flex. of humerus
Pectoralis Major (sternal) Add. horizontal Add medial rot. and flexion of humerus.ext. of humerus from flexed position
coracobrachialis Flexion and add of humerus
Deltoid (anterior) Flexion, horizontal rotation
Detoid (middle) abd. to 90 degrees
Deltoid (posterior) Ext. horizontal abd. lateral rotation
Supraspinatus Initiates abduction of the humerus
Infraspinatus Lateral rotation of humerus
Subscapularis Medial rotaion of humerus
Teres Minor Lateral rotation of humerus
Teres Major Ext. Add Medial rotation of humerus
Latissimus Dorsi Extension Add. medial rotation of humerus
Biceps Brachii Flex. of arm and forearm, supinates forearm
Brachialis Flexion of the elbow
Brachioradialis Flexion of the elbow
Triceps Brachii Extension of elbow
Pronator teres Pronates the hand, assists in elbow flexion
Pronator Quadratus Pronates the hand
Supinator Assists biceps to supinate hand and forearm
Flexor carpi radialis Flexion, abd. of wrist
Flexor carpi ulnaris Flexion abduction of wrist
Flexor Digitorum superficialis int. action flexes middle phalanx digits 2-5 cont. action flexes proximal phalanx of digits 2-5 and wrist
Flexor digitorum profundus int. flexes distal phalanges 2-5 Cont action assist flex. of middle, proximal phalanges and wrist
Extensor digitorum Ext. of MP joints and with lumbricals and interossie extends PIP and DIP joints
Extensor indicus Ext. of index finger at PIP and DIP joints with lumbricals and interosseous and extends Mp joint
Created by: d4moso
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