Muscles of Hand

Question 1

palmaris brevis

Answer 1

palmar aponeurosis
–>
skin of medial border of hand

wrinkles the skin on the ulnar side of the hand

Question 2

flexor pollicis brevis

Answer 2

flexor retinaculum, distal row of carpal bones
–>
base of proximal phalanx of thumb

thumb flexion

Question 3

abductor pollicis brevis

Answer 3

flexor retinaculum, tubercles of scaphoid and trapezium
–>
base of proximal phalanx of thumb

thumb abduction

Question 4

opponens pollicis

Answer 4

flexor retinaculum, tubercle of trapezium
–>
anterolateral surface of shaft of metacarpal 1

thumb opposition

Question 5

Flexor digiti minimi

Answer 5

hook of hamate
–>
base of p1 digit 5

LF Flexion

Question 6

abdcutor digiti minimi

Answer 6

pisiform, tendon of FCU
–>
medial shaft of MC 5

Little finger abduction and flexion

Question 7

Opponens digiti minimi

Answer 7

hook of hamate, flexor retinaculum
–>
medial surface of shaft of metacarpal 5

LF opposition

Question 8

adductor pollicis

Answer 8

bases of MC 2-45, shaft of MC 3, trapezoid and capitate
–>
base of proximal phalanx of thumb

Thumb adduction

Question 9

lumbricals

Answer 9

tendons of flexor digitorum profundus
–>
lateral side of DDE to bases of distal phalanx digits 2-5

flexion of the MCP while extending the PIP and DIP via DDE

Question 10

dorsal interossei

Answer 10

adjacent sides of MC digits 1-5
–> dorsal digital expansion of digits 2-4

flexion of the MCP, extension and abduction of the PIPs and DIPs