Forearm (posterior) Flashcards by Rafi Ahmed

List the posterior superficial muscles of the forearm

Brachioradialis
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor carpi ulnaris
Extensor digitorum
Extensor digiti minimi

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What is the origin and insertion of brachioradialis?

Common extensor tendon

Distal radius

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What is the nerve + arterial supply to brachioradialis?

Radial nerve

Radial recurrent nerve

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Which movements does brachioradialis enable?

Elbow: flexion
Forearm: supination

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What is the origin and insertion of extensor carpi radialis longus?

Common extensor tendon

2nd metacarpal

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What is the nerve + arterial supply to extensor carpi radialis longus?

Radial nerve

Radial artery

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Which movements does extensor carpi radialis longus enable?

Wrist: extension, abduction

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What is the origin and insertion of extensor carpi radialis brevis?

Common extensor tendon

3rd metacarpal

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What is the nerve + arterial supply to extensor carpi radialis brevis?

Radial nerve

Radial artery

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Which movements does extensor carpi radialis brevis enable?

Wrist: extension, abduction

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What is the origin and insertion of extensor digitorum?

Common extensor tendon

Medial 4 digits (fingers)

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What is the nerve + arterial supply to extensor digitorum?

Radial nerve

Posterior interosseous artery

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Which movements does extensor digitorum enable?

Wrist: extension
Hand: extension
Fingers: extension

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What is the origin and insertion of extensor digiti minimi?

Common extensor tendon

5th digit

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What is the nerve + arterial supply to extensor digiti minimi?

Radial nerve

Posterior interosseous artery

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Which movements does extensor digiti minimi enable?

Wrist: extension

Little finger: extension

What is the origin and insertion of extensor carpi ulnaris?

Common extensor tendon

5th metacarpal

What is the nerve + arterial supply to extensor carpi ulnaris?

Radial nerve

Ulnar artery

Which movements does extensor carpi ulnaris enable?

Wrist: extension, adduction

List the posterior deep muscles of the forearm

Supinator
Extensor indicis
Extensor pollicis longus
Extensor pollicis brevis
Abductor pollicis longus

What is the origin and insertion of supinator?

Shaft of radius + ulna, interosseous membrane

Proximal radius

What is the nerve + arterial supply to supinator?

Radial nerve

Radial recurrent artery

Which movements does supinator enable?

Forearm: supination

What is the origin and insertion of extensor indicis?

Interosseus membrane
2nd digit (index finger)

What is the nerve + arterial supply to extensor indicis?

Posterior interosseous nerve | Posterior interosseous artery

Which movements does extensor indicis enable?

Wrist: extension | Index finger: extension

What is the origin and insertion of extensor pollicis longus?

Interosseous membrane | Distal phalanx of thumb

What is the nerve + arterial supply to extensor pollicis longus?

Posterior interosseous nerve | Posterior interosseous artery

Which movements does extensor pollicis longus enable?

Thumb: extension

What is the origin and insertion of extensor pollicis brevis?

Interosseous membrane | Proximal phalanx of thumb

What is the nerve + arterial supply to extensor pollicis brevis?

Posterior interosseous nerve | Posterior interosseous artery

Which movements does extensor pollicis brevis enable?

Thumb: extension

What is the origin and insertion of abductor pollicis longus?

Shaft of radius + ulna, interosseous membrane | 1st metacarpal

What is the nerve + arterial supply to abductor pollicis longus?

Posterior interosseous nerve | Posterior interosseous artery

Which movements does abductor pollicis longus enable?

Thumb: extension, abduction

What is the main nerve supply to the posterior compartment of the forearm?

Radial nerve