EXSS 275L - Elbow, Wrist, Hand Posterior Forearm superficial and deep extensors/supinators

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Extensor pollicis longus insertion

Base of distal phalanx of thumb

Abductor pollicis longus insertion

Base of the 1st metacarpal

Extensor digitorum insertion

Bases of middle and distal phalanges of the medial 4 digits

Extensor indicis origin

Distal posterior ulna Interosseous membrane

Extensor carpi radialis brevis insertion

Dorsal surface of base of 3rd metacarpal

Extensor indicis insertion

Dorsal surface of base of middle and distal phalanx of the index finger

Extensor pollicis longus action

Extension of distal phalanx of thumb

Supinator Action

Forearm supination

Extensor indicis action

Index finger MCP extension Assists with wrist extension

Extensor carpi radialis brevis origin

Lateral epicondyle of humerus

Extensor carpi ulnaris origin

Lateral epicondyle of humerus

Supinator origin

Lateral epicondyle of humerus Lateral ulna

Extensor digitorum action

MCP extension of medial 4 digits Assists with wrist and elbow extension

Extensor carpi ulnaris insertion

Medial side of base of 5th metacarpal

Extensor pollicis longus origin

Posterior surface of ulna Interosseous membrane

Abductor pollicis longus origin

Posterior surface of ulna Interossesus membrane Middle of posterior surface of radius

Abductor pollicis longus innervation

Radial nerve

Extensor carpi radialis longus innervation

Radial nerve

Extensor indicis innervation

Radial nerve

Extensor pollicis longus innervation

Radial nerve

Supinator Innervation

Radial nerve

Abductor pollicis longus action

Thumb and wrist abduction

Extensor carpi radialis brevis action

Wrist extension Radial deviation Assist with elbow extension

Extensor carpi radialis longus action

Wrist extension Radial deviation Assists with elbow extension

Extensor carpi ulnaris action

Wrist extension Ulnar deviation Assist with elbow extension

Extensor carpi radialis longus insertion

dorsal surface of base of 2nd metacarpal

Extensor carpi radialis longus origin

lateral epicondyle of humerus

Extensor digitorum origin

lateral epicondyle of humerus

Supinator insertion

lateral surface of radius

Extensor carpi ulnaris innervation

radial nerve

Extensor digitorum innervation

radial nerve


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