Hand Action

Question 1

Opponens pollicis

Answer 1

Pulls anteriorly and medially rotate (metacarpal of) thumb

Opposing = medially rotate metacarpal towards center of palm

Question 2

Abductor pollicis brevis

Answer 2

Abducts thumb, helps oppose

Question 3

Flexor pollicis brevis - Superficial

Answer 3

Flexes thumb

Question 4

Flexor pollicis brevis - Deep

Answer 4

Flexes thumb

Question 5

Adductor pollicis

Answer 5

Adducts thumb to lateral border of palm

Question 6

Abductor digiti minimi

Answer 6

Abducts 5th digit;

Flexes proximal phalanx of 5th digit

Question 7

Flexor digiti minimi brevis

Answer 7

Flexes proximal phalanx of 5th digit

Question 8

Opponens digiti minimi

Answer 8

Anteriorly pulls and rotates 5th metacarpal(?) to bring it in opposition with thumb

Question 9

Lumbricals 1-4

Answer 9

Flex metacarpophalangeal joints;

Extends interphalangeal joints of 2nd-5th digits

Question 10

Dorsal interossei

Answer 10

Assists lumbricals in their action;

Abducts 2nd-4th digits away from axial line

Question 11

Palmar interossei

Answer 11

Assists lumbricals in their action;
Adducts 2nd, 4th and 5th digits towards axial line;
Extensor expansions of 2nd-4th digits