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10 Cards in this Set

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  • Back
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Abductor pollicis Brevis

O: Flexor retinaculum, tubercles of scaphoid and trapezium


I: 1st proximal phalanx


A: abduction of thumb


N: recurrent branch of median nerve

First Thenar Muscle

Flexor Pollicis Brevis

O: Flexor retinaculum, tubercles of scaphoid and trapezium


I: Base of 1st proximal phalanx


A: Flexes thumb


I: recurrent branch of median nerve

Second thenar muscle

Opponens pollicis

O: Flexor retinaculum, tubercles of scaphoid and trapezium


I: 1st metacarpal


A: Opposition towards digit 5


N: Recurrent branch of median nerve

Third Thenar Muscle

Abductor digiti mini

O: pisiform


I: base of 5th proximal phalanx


A: abduction of digit 5


N: Deep branch of ulnar nerve

First hypothenar

Flexor Digiti minimi brevis

O: hook of hamate and the flexor retinaculum


I: Base of 5th proximal Phalanx


A: Flexes proximal phalanx of digit 5


N: Deep branch of ulnar nerve

Second Hypothenar

Opponens digiti minimi

O: hook of hamate and the flexor retinaculum


I: 5th metacarpal


A: Opposition towards digit 1


N: Deep branch of ulnar nerve

Third Hypothenar

Adductor Pollicis

O: oblique head: bases of 2nd and 3rd MC, capitate and adjacent carpals; Transverse head: anterior surface of 3rd MC


I: Base of 1st proximal phalynx


A: Adduct thumb toward lateral palm


N: Deep branch of ulnar nerve

Adductor muscle

4 Lumbricals

O: Tendons of flexor digitorum profundus


I: Lateral sides of extensor expansions of digits 2-5


A: Flex MC joints, extend IP joints 2-5


N: 1&2 median; 3&4 Ulnar

Central Muscles

3 Palmar interossei

O: Palmar surfaces of MC 2, 4, 5


I: 2, 4, 5 proximal phalanges and extensor expansions


A: Adduction of 2, 4, 5 digits and flexion of MC joint


N: Deep branch of ulnar

Intersossei 1: adduction

4 Dorsal intercossei

O: adjacent surfaces of MC


I: Digits 2-4 bases of proximal phalanges & extensor expansion


A: abduction of digits 2-4 and flexion at the MC joint


N: Deep branch of ulnar

Interossei 2: abduction