forearm & hand
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| muscles of forearm supination and pronation | supination-biceps brachii, supinator, brachioradialis (assists)
pronation-pronator teres, pronator quadratus, brachioradialis (assists)
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| elbow extension & flexion | flexion-biceps brachii, brachialis, brachioradialis, flexor carpi radialis, flexor carpi ulnaris (assists), palmaris longus, pronator teres (assists), extensor carpi radialis longus and brevis (assists)
extension-triceps brachii, anconeus
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| wrist extension/flexion | radiocarpal joint
extension-extensor carpi radialis brevis, extensor carpi radialis longus, extensor carpi ulnaris, extensor digitorum
flexion-flexor carpi radialis, flexor carpi ulnaris, palmaris longus, flexor digitorum superficialis and profundus
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| wrist adduction/abduction | abduction-radial deviation-extensor carpi radialis longus & brevis, flexor carpi radialis
adduction-ulnar deviation-extensor carpi ulnaris, flexor carpi ulnaris
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| hand and finger extension of 2nd-5th fingers | mp, pip, dip joints-extensor digitorum, extensor indicis (2nd)
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| flexion of 2nd-5th fingers | mp, pip, dip joints-flexor digitorum superficialis & profundus, flexor digitorum mimimi brevis (5th)
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| thumb flexion | 1st cmp, mp joint
flexor pollicis longus & brevis, abductor pollicis
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| thumb extension | extensor pollicis longus & brevis, abductor pollicis longus
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| thumb opposition | opponens pollicis, flexor pollicis brevis (assists), abductor pollicis brevis (assists)
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| structures that pass through the carpal tunnel | median nerve, flexor digitorum superficialis & profundus, flexor pollicis longus
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| 3 retinacula | palmar carpal ligament, flexor retinaculum, extensor retinaculum
hold tendons in place, provide leverage as the f(x) as pulleys
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| superficial muscles of the forearm-anterior | flexor carpi radialis, pronator teres, palmaris longus, flexor carpi ulnaris, (brachioradialis), (flexor digitorum superficialis)
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| pronator teres | a-pronate radioulnar joint at proximal end, assists in elbow flexion
o-medial epicondyle of humerus
i-middle lateral surface of the radius
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| flexor carpi radialis | a-flex wrist at radiocarpal joint, abduct the wrist, assists in elbow flexion
o-medial epicondyle of humerus
i-bases of 2nd and 3rd metacarpals
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| palmaris longus | a-flexes hand and tenses palmar aponeurosis
o-medial epicondyle of humerus
i-flexor retinaculum, palmar aponeurosis
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| flexor carpi ulnaris | a-flex the wrist at radiocarpal joint, adduct the wrist, assist elbow flexion
o-medial epicondyle of humerus
i-pisiform bone, by tendon to hamate and base of fifth metacarpal
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| flexor digitorum superficialis | a-flexes 2nd -5th fingers at pip, mp, and cmc
o-volar forearm
i-by 4 tendons to the sides of the middle phalanges of 2nd-5th fingers
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| deep layers of forearm-anterior | flexor digitorum profundus, pronator quadratus, flexor pollicis longus (supinator-on back)
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| flexor digitorum profundus | a-flex the fingers at dip, pip, mp, cmc
o-volar forearm
i-by 4 tendons to the sides of the base of the distal phalanges of the 2nd - 5th fingers
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| pronator quadratus | a-pronate the forearm radioulnar joints at distal end
o-medial anterior surface of distal ulna
i-distal radius
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| flexor pollicis longus | a-flexion of IP, by continued action of flexion of thumb and wrist joints proximal to this
o-middle of anterior surface of radius and interosseus membrane
i-base of distal phalanx
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| dorsal forearm muscles-superficial | brachioradialis, extensor carpi radialis longus & brevis, extensor digitorum, extensor carpi ulnaris, (anconeus)
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| brachioradialis | a-flexion of radiohumeral joint, assist in supination and pronation when these actions are resisted
o-lateral supracondylar ridge of humerus
i-styloid process of radius
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| extensor carpi radialis longus | a-extend the wrist at radiocarpal joint, abduct the wrist, assist to flex the elbow
o-lateral epicondyle of humerus
i-base of 2nd metacarpal
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| extensor carpi radialis brevis | a-extend the wrist at radiocarpal joint, abduct the wrist, assist elbow flexion
o-lateral epicondyle of humerus
i-base of 3rd metacarpal
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| extensor digitorum | a-extend the 2nd-5th fingers (mp, pip, dip joints)
o-lateral epicondyle of humerus
i-middle and distal phalanges of 2nd -5th fingers
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| extensor carpi ulnaris | a-extend wrist at radiocarpal joint, adduct the wrist
o-lateral epicondyle of humerus
i-base of 5th metacarpal
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| muscles of posterior forearm-deep | abductor pollicis longus, extensor pollicis brevis, supinator, extensor pollicis longus, (extensor indicis)
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| supinator | a-supinate the forearm radioulnar joint
o-radial collateral ligament, annular ligament, supinator crest of the ulna
i-lateral surface of proximal shaft of the radius
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| extensor pollicis longus | a-extend the thumb (ip joint)
o-posterior surface of ulna and interosseous membrane
i-distal phalange of thumb
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| extensor pollicis brevis | a-extend the thumb (interphalangeal jt), assist to extend the thumb (mp, cmc jts)
o-posterior surface of radius, and interosseus membrane
i-proximal phalange of thumb
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| abductor pollicis longus | a-abduct the thumb (carpometacarpal joint), extend the thumb (carpometacarpal jt)
o-posterior surface of radius and ulna, and interosseous membrane
i-base of first metacarpal
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| extensor indicis | a-extend the second finger (metacarpophalangeal jt), assist adduct second finger
o-posterior surface of distal shaft of ulna and interosseus membrane
i-tendon of extensor digitorum at level of second metacarpal
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| anconeus | a-extend the elbow humeroulnar joint
o-lateral epicondyle of humerus
i-olecranon process and lateral edge of ulnar shaft
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Created by:
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