Hand Intrinsic Muscles

Question 1

dorsal interossei (origin)

Answer 1

adjacent sides of two metacarpal bones

Question 2

dorsal interossei (insertion)

Answer 2

base of proximal phalanges
extensor expansion of 2-4 digits

Question 3

dorsal interossei (action)

Answer 3

ABDucts digits away from 3rd digit (axial line)
DAB

Question 4

dorsal interossei (nerve)

Answer 4

ulnar nerve

Question 5

palmar interossei (origin)

Answer 5

sides of metacarpals 2,4,5

Question 6

palmar interossei (insertion)

Answer 6

base of proximal phalanx and extensor expansion of 2,4,5 digits

Question 7

palmar interossei (action)

Answer 7

ADDuct towards 3rd digit (axial line)
PADD

Question 8

palmar interossei (nerve)

Answer 8

ulnar nerve

Question 9

lumbricals (origin)

Answer 9

1st & 2nd: lateral 2 tendons of flexor digitorum profundus
3rd & 4th: medial 3 tendons of flexor digitorum profundus

Question 10

lumbricals (insertion)

Answer 10

1st & 2nd: lateral sides of extensor expansion of 2 and 3 digits
3rd & 4th: lateral sides of extensor expansion of 4 and 5 digits

Question 11

lumbricals (action)

Answer 11

extends digits at interphalangeal joints
flexs digits at metacarpophalangeal joints
(LUMBRICAL GRIP)

Question 12

lumbrical (nerve)

Answer 12

ulnar nerve