Muscles of the hand

Question 1

thenar eminence

Answer 1

muscles of the thumb
abductor pollicis brevis
flexor pollicis brevis
opponens pollicis brevis

Question 2

origin of abductor pollicis brevis

Answer 2

scaphoid
trapezium
flexor retinaculum

Question 3

insertion of abductor pollicis brevis

Answer 3

base of first proximal phalanx

radial sesamoid bone

Question 4

innervation of abductor pollicis brevis

Answer 4

median nerve

Question 5

origin of flexor pollicis brevis

Answer 5

trapezium

flexor retinaculum

Question 6

insertion of flexor pollicis brevis

Answer 6

base of proximal phalanx

Question 7

innervation of flexor pollicis brevis

Answer 7

median nerve

Question 8

action of flexor pollicis brevis

Answer 8

Flexes the metacarpophalangeal (MCP) joint of the thumb

Question 9

action of abductor pollicis brevis

Answer 9

Abducts the thumb

Question 10

origin of opponens pollicis

Answer 10

trapezium

associated flexor retinaculum.

Question 11

insertion of opponens pollicis

Answer 11

lateral margin of the metacarpal of the thumb (i.e. the first metacarpal).

Question 12

innervation of opponens pollicis

Answer 12

median nerve

Question 13

Action of opponens pollicis

Answer 13

Opposes the thumb, by medially rotating and flexing the metacarpal on the trapezium

Question 14

hypothenar muscles

Answer 14

muscles of the little finger;
opponens digiti minimi
abductor digiti minimi
flexor digiti minimi 
palmaris brevis

Question 15

origin of abductor digiti minimi

Answer 15

pisiform

tendon of the flexor carpi ulnaris.

Question 16

insertion of abductor digiti minimi

Answer 16

proximal phalanx of 5th finger

dorsal aponeurosis of 5th finger

Question 17

innervation of abductor digiti minimi

Answer 17

ulnar nerve

Question 18

origin of opponens digiti minimi

Answer 18

hook of hamate

flexor retinaculum,

Question 19

insertion of opponens digiti minimi

Answer 19

the medial margin of metacarpal V.

Question 20

action of opponens digiti minimi

Answer 20

It rotates the metacarpal of the little finger towards the palm, producing opposition

Question 21

innervation of opponens digiti minimi

Answer 21

ulnar nerve

Question 22

origin of flexor digiti minimi

Answer 22

hook of hamate

flexor retinaculum,

Question 23

insertion of flexor digiti minimi

Answer 23

the base of the proximal phalanx of the little finger.

Question 24

action of flexor digiti minimi

Answer 24

Flexes the MCP joint of the little finger

Question 25

innervation of flexor digiti minimi

Answer 25

ulnar nerve

Question 26

bipennate muscles of lumbricals

Answer 26

3 and 4 - ring finger and pinky finger

Question 27

unipennate muscles of lumbricals

Answer 27

1 and 2 - index and middle finger

Question 28

origin of lumbricals

Answer 28

flexor digitorum profundus

Question 29

insertion of lumbricals

Answer 29

extensor hood

Question 30

action of lumbricals

Answer 30

Flexion at the MCP joint and extension at the interphalangeal (IP) joints of each digit.

Question 31

innervation of lumbricals in index and middle finger

Answer 31

median nerve

Question 32

innervation of lumbricals in ring finger and pinky finger

Answer 32

ulnar nerve

Question 33

origin of dorsal interossei

Answer 33

lateral and medial surfaces of the metacarpals.

Question 34

insertion of dorsal interossei

Answer 34

extensor hood and proximal phalanx of each finger.

Question 35

action of dorsal interossei

Answer 35

abduct the fingers at the MCP joint.

Question 36

innervation of dorsal interossei

Answer 36

ulnar nerve

Question 37

origin of palmar interossei

Answer 37

medial or lateral surface of a metacarpal

Question 38

insertion of palmar interossei

Answer 38

extensor hood and proximal phalanx of same finger.

Question 39

action of palmar interossei

Answer 39

Adducts the fingers at the MCP joint.

Question 40

innervation of palmar interossei

Answer 40

ulnar nerve

Question 41

origin of palmaris brevis

Answer 41

palmar aponeurosis and flexor retinaculum,

Question 42

insertion of palmaris brevis

Answer 42

dermis of the skin on the medial margin of the hand.

Question 43

action of palmaris brevis

Answer 43

Wrinkles the skin of the hypothenar eminence and deepens the curvature of the hand, improving grip.

Question 44

innervation of palmaris brevis

Answer 44

ulnar nerve

Question 45

origin of adductor pollicis

Answer 45

One head originates from metacarpal III. The other head originates from the capitate and adjacent areas of metacarpals II and III.

Question 46

insertion of adductor pollicis

Answer 46

Both attach into the base of the proximal phalanx of the thumb.

Question 47

action of adductor pollicis

Answer 47

Adductor of the thumb.

Question 48

innervation of adductor pollicis

Answer 48

ulnar nerve