Hand

Question 0

abductor pollicis brevis

Answer 0

PA: flexor retinaculum and tubercles of scaphoid and trapezium
DA: lateral side of base of proximal phalanx of thumb
N: recurrent branch of median nerve (C8, T1)
MA: abducts thumb; helps oppose it

Question 1

Opponens pollicis

Answer 1

PA: flexor retinaculum and tubercles of scaphoid and trapezium
DA: lateral side of 1st metacarpal
N: recurrent branch of median nerve (C8,T1)
MA: to oppose thumb, draws 1st metacarpal medially to center palm, and rotates it medially

Question 2

Flexor pollicis brevis

Answer 2

PA: flexor retinaculum and tubercles of scaphoid and trapezium
DA: lateral side of base of proximal phalanx of thumb
N: recurrent branch of median N. (C8, T1)
MA: flexes thumb

Question 3

abductor digiti minimi

Answer 3

PA: Pisiform
DA: medial side of base of proximal phalanx of 5th finger
N: deep branch of ulnar nerve (C8,T1)
MA: abducts 5th finger; assists in flexion of its proximal phalanx

Question 4

flexor digiti minimi brevis

Answer 4

PA: hook of hamate and flexor retinaculum
DA: medial side of base of proximal phalanx of 5th finger
N: deep branch of ulnar N. (C8,T1)
MA: flexes proximal phalanx of 5th finger

Question 5

opponens digiti minimi

Answer 5

PA: hook of hamate and flexor retinaculum
DA: medial border of 5th metacarpal
N: deep branch of ulnar N. (C8, T1)
MA: draws 5th metacarpal anterior and rotates it, bringing 5th finger into opposition with thumb

Question 6

Lumbricals 1 and 2

Answer 6

PA: lateral two tendons of flexor digitorum profundus (as unipennate muscle)
DA: lateral sides of extensor expansions
N: median N. (C8, T1)
MA: flex metacarpopgalangeal joints; extend interphalangeal joint of 2nd-5th fingers

Question 7

lumbricals 3 and 4

Answer 7

PA: medial three tendons of flexor digitorum profundus (as bipennate muscles)
DA: lateral sides of extensor expansions
N: deep branch of ulnar N. (C8, T1)
MA: flex metacarpophalangeal joints; extends interphalangeal joints of 2nd-5th fingers

Question 8

dorsal interossei 1-4

Answer 8

PA: adjacent sides of two metacarpals (as bipennate muscles)
DA: bases of proximal phalanges; extensor expansions of 2nd - 4th fingers
N: deep branch of ulnar N. (C8,T1)
MA: abduct 2nd-4th fingers from axial line; act with lumbricals in flexing metacarpophalangeal joints and extending interphalangeal joints

Question 9

palmar interossei 1-3

Answer 9

PA: palmar surfaces of 2nd, 4th and 5th metacarpals (as unipennate muscles)
DA: bases of proximal phalanges; extensors expansions of 2nd, 4th, and 5th fingers
N: deep branch of ulnar N. (C8, T1)
MA: adduct 2nd, 4th and 5th fingers toward axial line; assist lumbricals in flexing metacarpophalangeal joints and extending interphalangeal joints

Question 10

Adductor pollicis

Answer 10

O: transverse head: anterior surface of 3rd metacarpal
Oblique head: base of the 2nd and 3rd metacarpals, capitate, adjacent carpals
I: medial side of proximal phalanx
N:deep ulnar nerve (C8, T1)
MA: adducts thumb toward the palm