Intrinsic Muscles of Hand

Question 0

Opponens Policis

Insertion

Answer 0

Lateral side of 1st metacarpal

Question 1

Opponens Policis

Origin

Answer 1

Flexor retinaculum and tubercle of scaphoid and trapezium

Question 2

Opponens Pollicis

Innervation

Answer 2

Recurrent branch of median nerve (C8, T1)

Question 3

Opponens Pollicis

Actions

Answer 3

To oppose thumb, it draws 1st metacarpal medially to center of palm and rotates it medially

Question 4

Abductor Pollicis Brevis

Origin

Answer 4

Flexor retinaculum and tubercles of scaphoid and trapezium

Question 5

Abductor Pollicis Brevis

Insertion

Answer 5

Lateral side of base of proximal phalanx of thumb

Question 6

Abductor Pollicis Brevis

Innervation

Answer 6

Recurrent branch of median nerve (C8, T1)

Question 7

Abductor Pollicis Brevis

Actions

Answer 7

Abducts thumb; helps oppose it

Question 8

Flexor Pollicis Brevis
Superficial Head
Deep Head

Answer 8

Flexor retinaculum and tubercles of scaphoid and trapezium

Question 9

Flexor Pollicis Brevis

Insertion

Answer 9

Lateral side of base of proximal phalanx of thumb

Question 10

Flexor Pollicis Brevis

Innervation

Answer 10

Recurrent branch of median nerve (C8, T1)

Question 11

Flexor Pollicis Brevis

Actions

Answer 11

Flexes thumb

Question 12

Adductor Pollicis
Oblique Head
Transverse Head

Answer 12

Bases of 2nd and 3rd metacarpals, capitate, adjacent carpals

Anterior surface of shaft of 3rd metacarpal

Question 13

Adductor Pollicis

Insertion

Answer 13

Medial side of base of proximal phalanx of thumb

Question 14

Adductor Pollicis

Innervation

Answer 14

Deep branch of ulnar nerve (C8, T1)

Question 15

Adductor Pollicis

Actions

Answer 15

Adducts thumb toward lateral border of palm

Question 16

Abductor Digiti Minimi

Origin

Answer 16

Pisiform

Question 17

Abductor Digiti Minimi

Insertion

Answer 17

Medial side of base of proximal phalanx of 5th finger

Question 18

Abductor Digiti Minimi

Innervation

Answer 18

Deep branch of ulnar nerve (C8, T1)

Question 19

Abductor Digiti Minimi

Actions

Answer 19

Abducts 5th finger; assists in flexion of its proximal phalanx

Question 20

Flexor Digiti Minimi Brevis

Origin

Answer 20

Hook of hamate and flexor retinaculum

Question 21

Flexor Digiti Minimi Brevis

Insertion

Answer 21

Medial side of base of proximal phalanx of 5th finger

Question 22

Flexor Digiti Minimi Brevis

Innervation

Answer 22

Deep branch of ulnar nerve (C8, T1)

Question 23

Flexor Digiti Minimi Brevis

Actions

Answer 23

Flexes proximal phalanx of 5th finger

Question 24

Opponens Digiti Minimi | Origin

Answer 24

Hook of hamate and flexor retinaculum

Question 25

Opponens Digiti Minimi | Insertion

Answer 25

Medial border of 5th metacarpal

Question 26

Lumbricals 1 and 2 | Origin

Answer 26

Lateral two tendons of flexor digitorum profundus | unipennate

Question 27

Lumbricals 1 and 2 | Insertion

Answer 27

Lateral sides of extensor expansions of 2nd-5th fingers

Question 28

Lumbricals 1 and 2 | Innervation

Answer 28

Median nerve (C8, T1)

Question 29

Lumbricals 1 and 2 | Actions

Answer 29

Flex metacarpophalangeal joints; extend interphalangeal joints of 2nd-5th fingers

Question 30

Lumbricals 3 and 4 | Origin

Answer 30

Medial three tendons of flexor digitorum profundus | bipennate muscles

Question 31

Lumbricals 3 and 4 | Insertion

Answer 31

Lateral sides of extenso expansions of 2nd-5th fingers

Question 32

Lumbricals 3 and 4 | Innervation

Answer 32

Deep branch of ulnar nerve (C8, T1)

Question 33

Lumbricals 3 and 4 | Actions

Answer 33

Flex metacarpophalangeal joints; extend interphalangeal joints of 2nd-5th fingers

Question 34

Dorsal Interossei, 1-4 | Origin

Answer 34

Adjacent sides of two metacarpals | Bipennate muscles

Question 35

Dorsal Interossei, 1-4 | Insertion

Answer 35

Bases of proximal phalanges; extensor expansions of 2nd-4th fingers

Question 36

Dorsal Interossei, 1-4 | Actions

Answer 36

Abduct 2nd-4th fingers from axial line; act with lumbricals in flexing metacarpophalangeal joints and extending interphalangeal joints

Question 37

Palamar interossei, 1-3 | Origin

Answer 37

Palmar surfaces of 2nd, 4th, and 5th metacarpals | unipennate muscles

Question 38

Palmar Interossei, 1-3 | Insertion

Answer 38

Bases of proximal phalanges; extensor expansions of 2nd, 4th, and 5th fingers

Question 39

Palmar Interossei, 1-3 | Innervation

Answer 39

Deep branch of ulnar nerve (C8, T1)

Question 40

Palmar Interossei, 1-3 | Actions

Answer 40

Adduct 2nd, 4th, and 5th fingers toward axial line; assist lumbricals in flexing metacarpophalangeal joints and extending interphalangeal joints