Hand muscle origin, insertion, action

Question 1

Abductor Digiti Minimi origin

Answer 1

Pisiform bone
and tendon of
flexor carpi
ulnaris

Question 2

Abductor Digiti Minimi insertion

Answer 2

Medial side
of base of
proximal
phalanx of
5th digit

Question 3

Abductor Digiti Minimi action

Answer 3

Abducts 5th digit

Question 4

Abductor pollicis brevis origin

Answer 4

flexor
retinaculum,
tubercles of
scaphoid and
trapezium

Question 5

Abductor pollicis brevis insertion

Answer 5

lateral sides
of base of
proximal
phalanx of
thumb

Question 6

Abductor pollicis brevis action

Answer 6

Abducts Thumb

Question 7

Adductor pollicis origin

Answer 7

Oblique head:
bases of 2nd and
3rd metacarpals
and capitate and
adjancent bones

Transverse
head:anterior
surface of 3rd
metacarpal

Question 8

Adductor pollicis insertion

Answer 8

medial side
of base of
proximal
phalanx of
thumb

Question 9

Adductor pollicis action

Answer 9

adducts thumb

Question 10

Dorsal interosseus origin

Answer 10

adjacent sides of
two metacarpal
bones

Question 11

Dorsal interosseus insertion

Answer 11

base of
proximal
phalanges,
extensor
expansion of
digits 2-4

Question 12

Dorsal interosseus action

Answer 12

Abducts digits from
axial line of hand
(3rd digit), flex
digits at
metacarpophalangea
l joint and extend
interphalangeal
joints

Question 13

Flexor Digiti minimi brevis origin

Answer 13

flexor
retinaculum and
hook of hamet

Question 14

Flexor Digiti minimi brevis insertion

Answer 14

medial side
of base of
proximal
phalanx of
5th digit

Question 15

Flexor Digiti minimi brevis action

Answer 15

flexes proximal

phalanx of 5th digit

Question 16

flexor pollicis brevis origin

Answer 16

flexor
retinaculum and
tubercle of
trapezium

Question 17

flexor pollicis brevis insertion

Answer 17

lateral side
of base of
proximal
phalanx of
thumb

Question 18

flexor pollicis brevis action

Answer 18

flexes proximal

phalanx of thumb

Question 19

lumberical, first and second origin

Answer 19

lateral two
tendons of flexor
digitorum
profundus

Question 20

lumberical, first and second insertion

Answer 20

lateral sides
of extensor
expansion of
digits 2 and
3

Question 21

lumberical, first and second action

Answer 21

extends digits at
interphalangeal
joints, flex
metacarpophalangea
l joints

Question 22

lumberical, third and fourth origin

Answer 22

medial 3 tendons
of flexor
digitorum
profundus

Question 23

lumberical, third and fourth insertion

Answer 23

lateral sides
of extensor
expansion of
digits 4 and
5

Question 24

lumberical, third and fourth action

Answer 24

extends digits at
interphalangeal
joints, flex
metacarpophalangeal joints

Question 25

opponens digiti minimi origin

Answer 25

flexor retinaculum and hook of hamate bone

Question 26

opponens digiti minimi insertion

Answer 26

palmar surface of 5th metacarpal

Question 27

opponens digiti minimi action

Answer 27

``` draws 5th metacarpal anteriorly and rotates it to face thumb ```

Question 28

opponens pollicis origin

Answer 28

flexor retinaculum and tubercle of trapezium

Question 29

opponens pollicis insertion

Answer 29

lateral side of 1st metacarpal

Question 30

opponens pollicis action

Answer 30

draws 1st metacarpal forward and rotates it medially

Question 31

palmar interosseous origin

Answer 31

sides of metacarpals 2, 4, and 5

Question 32

palmar interosseous insertion

Answer 32

``` bases of proximal phalanx and extensor expansion of digits 2, 4, and 5 ```

Question 33

palmar interosseous action

Answer 33

``` adducts digits toward axial line of hand (3rd digit), flexes digits at metacarpophalangea l joint and extends interphalangeal joints ```

Question 34

palmaris brevis origin

Answer 34

palmar aponeurosis and flexor retinaculum

Question 35

palmaris brevis insertion

Answer 35

skin of border of plam

Question 36

palmaris brevis action

Answer 36

deepens hollow of | hand , assists grip