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Forearm Muscles

Origins/Insertions/Actions

QuestionAnswer
Brachialis O: Distal half of anterior surface of humerus I: Tuberosity and coronoid process of ulna A: Flex the elbow
Brachioradialis O: Proximal 2/3rds of the lateral supracondylar ridge of humerus I: Styloid process of radius A: -Flex the elbow -Assist to pronate and supinate the forearm when those movements are resisted
Extensor Carpi Radialis Longus O: Distal 1/3rd of the lateral supracondylar ridge of humerus I: Base of the 2nd metacarpal A: -Extend the wrist -Abduct the wrist -Assist to flex the elbow
Extensor Carpi Radialis Brevis O: Common extensor tendon from the lateral epicondyle of the humerus I: Base of 3rd metacarpal A: -Extend the wrist -Abduct the wrist -Assist to flex the elbow
Extensor Carpi Ulnaris O: Common extensor tendon from the lateral epicondyle of the humerus I: Base of 5th metacarpal A: -Extend the wrist -Adduct the wrist
Extensor Digitorum O: Common extensor tendon from the lateral epicondyle of the humerus I: Bases of middle and distal phalanges of 2nd-5th fingers A: -Extend the 2nd-5th fingers -Assist to extend the wrist
Anconeus O: Lateral epicondyle of the humerus I: Olecranon process and posterior, proximal surface of ulna A: Extend the elbow
Extensor Indicis O: Posterior surface of distal shaft of ulna and interosseous membrane I: Tendon of extensor digitorum at the level of 2nd metacarpal A: -Extend the 2nd finger -Adduct the 2nd finger -May assist the extend the wrist
Flexor Carpi Radialis O: Common flexor tendon from medial epicondyle of the humerus I: Bases of 2nd and 3rd metacarpals A: -Flex the wrist -Abduct the wrist -May assist to flex the elbow
Palmaris Longus O: Common flexor tendon from medial epicondyle of the humerus I: Flexor retinaculum and palmar aponeurosis A: -Tense the palmar fascia -Flex the wrist -May assist to flex the elbow
Flexor Carpi Ulnaris O: -Humeral Head: Common flexor tendon from medial epicondyle of humerus -Ulnar Head: Posterior surface of proximal 2/3rds of ulna I: Pisiform, hook of hamate, and base of 5th metacarpal A: -Flex the wrist -Adduct the wrist -Assist to flex the elbow
Flexor Digitorum Superficialis O: Common flexor tendon from medial epicondyle of humerus, ulnar collateral ligament, coronoid process of ulna, interosseous membrane& proximal shaft of radius I: Sides of middle phalanges of 2nd-5th fingers A: -Flex the 2nd-5th fingers -Flex the wrist
Flexor Digitorum Profundus O: Anterior and medial surfaces of proximal three-quarters of ulna I: Bases of distal phalanges, palmar surface of 2nd-5th fingers A: -Flex 2nd-5th fingers -Assist to flex the wrist
Pronator Teres O: Common flexor tendon from medial epicondyle of humerus and coronoid process of the ulna I: Middle of lateral surface of the radius A: -Pronate the forearm -Assist to flex the elbow
Pronator Quadratus O: Medial, anterior surface of distal ulna I: Lateral, anterior surface of distal radius A: Pronate the forearm
Supinator O: Lateral epicondyle of the humerus, radial collateral ligament, annular ligament, supinator crest of of the ulna I: Anterior lateral shaft of proximal 1/3rd of radial shaft A: Supinate the forearm
Created by: maddileigh