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1 M. flexor carpi radialis. o: Medial epicondyle of 15 humerus. i: Base of2nd metacarpal bone. A: Pronation, flexion and radial abduction of the wrist joint. I. Median nerve. A

2 M. palmaris longus. o: Medial epicondyle of 16 humerus. i: Palmar aponeurosis. A: Tenses aponeurosis and flexes the wrist joint and fingers 2-5 at the metacarpophalangeal joints. Its tendon lies above the flexor retinaculum. I: Median nerve. A

3 M. flexor carpi ulnaris. o: Medial epicondyle of humerus, olecranon and ulna. i: Pisiform bone as well as the hamate and 5th metacarpal bones via 18 the pisohamate and pisometacarpal ligaments. A: Ulnar abduction and flexion of the wrist joint. I: Ulnar nerve. A

4 Humeral head of flexor carpi ulnaris. Caput 19 humerale. The part arising from the epicondyle of the humerus.

5 Ulnar head of flexor carpi ulnaris. Caput ul- 20 nare. The portion originating from the ulna. E

6 M. flexor digitorum superficialis. o: Medial 21 epicondyleofhumerus,coronoidprocessofulna and anterior surface of radius. i: Middle phalanx of fingers 2-5. A: Flexion of all joints it crosses. Each tendon is perforated by the corresponding tendon from the flexor digitorum profundus. I. Median nerve. A B

7 Humeroulnar head of flexor digitorum su-perficialis. Caput humeroulnare. The portion arising from the humerus and ulna. A E F

8 Radial head of flexor digitorum superfi- 23 cialis. Caput radiale. The portion arising from the radius. A E

9 M. flexor digitorum profundus. o: Upper half of ulna. i: Base of distal phalanges of fingers 2-5. A: Flexion of all joints crossed. The tendon per- 24 forates the corresponding superficial flexor tendon. I: Median and ulnar nerves. B E F

10 M. flexor pollicis longus. o: Middle ofanterior surface of radius and usually the medial epicon-dyle. i: Distal phalanx of thumb. A: Flexion of joints crossed. I: Median nerve. B E

11 M. pronator quadratus. o: Lower fourth of anterior surface of ulna. i: Lower fourth ofante-rior surface of radius. A: Pronation. I: Median nerve. A B E

12 M. brachioradialis. o: Intermuscular septum and lateral margin of humerus. i: Styloid process of radius. A: Flexion of the elbow joint. It brings the arm from the extreme pronation and supination position to the intermediate position. I: Radial nerve. A C E

13 M. extensor carpi radialis longus. o: Lateral intermuscular septum, lateral epicondyle. i: Ex-tensorsideofmetacarpal 2.A:Radialabduction and dorsiflexion of the wrist joint. Flexion of the elbow joint. I: Radial nerve. A C

14 M. extensor carpi radialis brevis. o: Lateral epi-condyle of humerus. i: Proximal extensor side of third metacarpal. A: Extension and radial abduction of wrist joint. I: Radial nerve. C

M. extensor digitorum. o: Lateral epicondyle of humerus. i: Distal phalanges 2-5 via their dorsal aponeurosis. A: Extension of fingers and dor-siflexion of the wrist joint. I: Radial nerve. C Intertendinous connections. Connexus inter-tendineus [[juncturae tendineum]]. Oblique tendinous connections between the extensor tendons of the fingers on the dorsum of the hand. C M. extensor digiti minimi. o: Lateral epicon-dyle of humerus. i: Dorsal aponeurosis of 5th finger. A: Extension of little finger, abduction and dorsiflexion of the wrist joint. I: Radial nerve. C M. extensor carpi ulnaris. o: Lateral epicondyle ofhumerus, radial collateral ligament, posterior surface of ulna. i: Base of 5th metacarpal. A: Dor-siflexion, ulnar abduction. I. Radial nerve. C D

Humeral head of extensor carpi ulnaris.

Caput humerale. The part arising from the humerus.

Ulnar head of extensor carpi ulnaris. Caput ulnare. The portion arising from the ulna. F M. supinator. o: Lateral epicondyle, radial collateral ligament, supinator crest of ulna. i: Anterior surface of radius. A: Supination. I: Radial nerve. D E F

M. abductor pollicis longus. o: Dorsal side of interosseous membrane and adjacent surfaces of radius and ulna. i: Base of 1st metacarpal. A: Radial abduction and dorsiflexion of the meta-carpophalangealjointofthethumb.Supination. I: Radial nerve. C D F

M. extensor pollicis brevis. o: Radius (extensor side) and interosseous membrane. i: Baseofpro-ximal phalanx of thumb. A: Abduction and extension of thumb at the metacarpophalangeal joint. I: Radial nerve. CDF M. extensor pollicis longus. o: Interosseous membrane and dorsal surface of ulna. i: Distal phalanx of thumb. A: Adducts and extends the thumb. Supinator. I: Radial nerve. C D F M. extensor indicis. o: Interosseous membrane and dorsal surface of ulna. i: Dorsal aponeurosis of index finger. A: Extends the index finger and wrist joint. I: Radial nerve. D F M. palmaris brevis. o: Ulnar side of palmar aponeurosis. i: Skin of ulnar aspect of hand. I. Ulnar nerve. A

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