Intrinsic Muscles of the Hand

Question 0

What is the Origin of the Opponens Pollicis?

Answer 0

Flexor Retinaculum and tubercles Scaphoid, and Trapezium

Question 1

What are the Thenar Muscles of the hand?

Answer 1

Oppenens Pollicis, Abductor Pollicis Brevis, Flexor Pollicis Brevis, Adductor Pollicis,

Question 2

What is the Insertion of the Opponens Pollicis?

Answer 2

Lateral Side of 1st Metacarpal

Question 3

What innervates with opponens pollicis?

Answer 3

Recurrent Branch of median nerve (C8, T1)

Question 4

What is the Action of the Opponens Pollicis?

Answer 4

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

Question 5

What is the Origin of the Abductor Pollicis Brevis?

Answer 5

Flexor Retinaculum and tubercles of the Scaphoid and Trapezium

Question 6

What is the Insertion of the Abductor Pollcis Brevis?

Answer 6

lateral side of base of proximal phalanx of thumb

Question 7

What is the innervation of the Abductor Pollicis Brevis

Answer 7

Recurrent Branch of Median Nerve (C8,T1)

Question 8

What is the action of the Abductor pollicis Brevis?

Answer 8

Abducts Thumb; helps oppose it

Question 9

What is the Origin of the Flexor Pollicis Brevis

Answer 9

Flexor Retinaculum and Tubercles of Scaphoid and Trapezium

Question 10

What is the Insertion of Flexor Pollicis Brevis?

Answer 10

Lateral side of base of proximal phalanx of thumb

Question 11

What is the Innervation of the Flexor Pollicis Brevis?

Answer 11

Recurrent Branch of the Median Nerve (C8, T1) C8 Main Segmental

Question 12

What is the Action of the Flexor Pollicis Brevis

Answer 12

Flexes thumb

Question 13

What is the Origin to Adductor Pollicis

Answer 13

Oblique Head: bases of 2nd and 3rd metacarpal, capitate, and other adjacent carapals

Transverse Head: Anterior surface of the shaft of 3rd Metacarpal

Question 14

What is the Insertion of the Adductor Pollicis

Answer 14

Medial side of base of proximal phalanx of thumb

Question 15

What is the innervation of the Adductor Pollicis

Answer 15

Deep branch of Ulnar Nerve C8,T1

Question 16

What is the action of the adductor pollicis

Answer 16

Adducts thumb toward lateral border of palm

Question 17

What are the Hypothenar Muscles?

Answer 17

Abductor digiti minimi, flexor digiti minimi brevis, opponens digiti minimi

Question 18

What is the origin of the abductor digiti minimi

Answer 18

Pisiform

Question 19

What is the insertion of the abductor digiti minimi

Answer 19

Medial side of base of proximal phalanx of 5th finger

Question 20

What is the innervation of the abductor digiti minimi?

Answer 20

Deep Branch of Ulnar Nerve (C8,T1) main segmental at T1

Question 21

What is the action of the abductor digiti minimi

Answer 21

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

Question 22

What is the origin of the flexor digiti minimi brevis

Answer 22

Hook of Hamate and Flexor Retinaculum

Question 23

What is the insertion of the flexor digiti minimi brevis

Answer 23

Medial side of base of the proximal phalanx of 5th finger

Question 24

What is the innervation of the flexor digiti minimi brevis?

Answer 24

Deep Branch of Ulnar Nerve (C8,T1) main segmental at T1

Question 25

What is the action of the flexor digiti minimi brevis?

Answer 25

flexes proximal phalanx of 5th finger

Question 26

What is the origin of the opponens digiti minimi

Answer 26

Hook of Hamate and Flexor Retinaculum

Question 27

What is the insertion of the Opponens Digiti Minimi

Answer 27

Medial border of the 5th metacarpal

Question 28

What is the innervation of the Opponens Digiti Minimi?

Answer 28

Deep Branch of Ulnar Nerve (C8,T1) main segmental at T1

Question 29

What is the action of the Opponens Digiti Minimi?

Answer 29

Draws 5th metacarpal anterior and rotates it, bringing 5th finger into opposition with thumb

Question 30

What are the Short Muscles?

Answer 30

Lumbricals (1 and 2, 3 and 4), Dorsal Interossei 1-4, Palmar Interossei 1-3

Question 31

What is the origin of the Lumbricals, 1 and 2?

Answer 31

lateral two tendons of flexor digitorum profundus (as unipennate muscles)

Question 32

What is the insertion of Lumbricals, 1 and 2

Answer 32

lateral sides of extensor expansions of the 2nd and 5th fingers

Question 33

What is the innervation of the Lumbricals, 1 and 2

Answer 33

Median Nerve (C8, T1) main segmental at T1

Question 34

What is the action of Lumbricals, 1 and 2

Answer 34

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

Question 35

What is the origin of the Lumbricals, 3 and 4

Answer 35

Medial three tendons of flexor digitorum profundus (as bipennate muscles)

Question 36

What is the insertion of Lumbricals, 3 and 4

Answer 36

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

Question 37

What is the innervation Lumbricals, 3 and 4

Answer 37

Deep branch of the ulnar nerve (C8, T1) main segmental T1

Question 38

What is the action of the Lumbricals, 3 and 4

Answer 38

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

Question 39

What is the origin of the Dorsal Interossei 1-4

Answer 39

Adjacent of two metacarpals (as bipennate muscles)

Question 40

What is the insertion of Dorsal Interossei 1-4

Answer 40

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

Question 41

What is the innervation of Dorsal Interossei 1-4

Answer 41

Deep Branch of Ulnar Nerve (C8,T1) main seg T1

Question 42

What is the action of the Dorsal Interossei 1-4

Answer 42

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

Question 43

What is the origin of the Palmar Interossei 1-3

Answer 43

Palmar Surfaces of 2nd, 4th, and 5th metacarpals (as unipennate muscles)

Question 44

What is the insertion of Palmar Interossei 1-3

Answer 44

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

Question 45

What is the innervation of Palmar Interossei 1-3

Answer 45

Deep Branch of the Ulnar Nerve (C8, T1) main seg T1

Question 46

What is the action of the Palmar Interossei 1-3

Answer 46

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