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Upper Extremity!
Muscles of the Upper Extremity
| Muscle | Function |
|---|---|
| Latissimus Dorsi | Adduction or extension of the arm at the shoulder. Internal rotation of the arm at the shoulder |
| Teres major | Adduction or extension of the arm at the shoulder. Internal rotation of the arm at the shoulder |
| Supraspinatus | Abduction of the arm at the shoulder. Only effective during the first 15-20 degrees of abduction |
| Infraspinatus | External rotation of the arm at the shoulder |
| Teres minor | External rotation of the arm at the shoulder |
| Subscapularis | Internal rotation of the arm at the shoulder |
| Deltoid | Flexion and internal rotation (anterior head), abduction (middle head), extension and hyperextension and external rotation (posterior head) of the arm at the shoulder |
| Pectoralis major | Flexion and internal rotation (clavicular head), horizontal adduction and internal rotation (sternal head), flexion from a hyperextended position and internal rotation (abdominal head) of the arm at the shoulder |
| Subclavius | unknown |
| Biceps brachii | Flexion of the arm at the shoulder, flexion of the forearm at the elbow only when the wrist is supinated |
| Coracobrachialis | Flexion and horizontal adduction of the arm at the shoulder |
| Brachialis | Flexion of the forearm at the elbow in all wrist positions |
| Triceps brachii | Extension and hyperextension of the arm at the shoulder (long head only), extension of the forearm at the elbow (long, lateral, and medial heads) |
| Anconeus | Extension of the forearm at the elbow |
| Brachioradialis | Flexion of the forearm at the elbow in all wrist positions, although this muscle favors a semiprone or neutral wrist position |
| Pronator teres | Pronation and flexion of the forearm at the elbow |
| Flexor carpi radialis | Flexion of the forearm at the elbow, flexion of the hand at the wrist, radial deviation of the hand at the wrist |
| Palmaris longus | Tightens the flexor retinaculum and subsequently the palmar aponeurosis |
| Flexor digitorum superficialis | Flexion of the forearm at the elbow, flexion of the hand at the wrist, flexion of the digits (from the middle phalanges) |
| Flexor carpi ulnaris | Flexion of the forearm at the elbow, flexion of the hand at the wrist, ulnar deviation of the hand at the wrist |
| Flexor digitorum profundus | Flexion of the hand at the wrist and flexion of the digits (from the distal phalanges) |
| Flexor pollicus longus | Flexion of the hand at the wrist, flexion of the thumb |
| Pronator quadratus | pronation |
| Extensor carpi radialis brevis and longus | Extension of the forearm at the elbow, extension of the hand at the wrist, radial deviation of the hand at the wrist |
| Extensor digitorum | Extension of the forearm at the elbow, extension of the hand at the wrist, extension of the digits |
| Extensor digiti minimi | Extension of the 5th digit |
| Extensor carpi ulnaris | Extension of the forearm at the elbow, extension of the hand at the wrist, ulnar deviation of the hand at the wrist |
| Extensor indicis | Extension of the hand at the wrist, extension of the 2nd digit |
| Abductor pollicus longus | Radial deviation of the hand at the wrist, abduction of thumb |
| Extensor pollicus brevis | Radial deviation of the hand at the wrist, extension of the thumb |
| Extensor pollicus longus | Radial deviation of the hand at the wrist, extension of the thumb |
| Supinator | Supinates |
Created by:
kitseeds
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