Intrinsic Hand Muscles

Question 0

Hypothenar Muscles

Answer 0

Abductor Digiti Minimi
Flexor Digiti Minimi Brevis
Opponens Digiti Minimi

Question 1

Thenar Muscles

Answer 1

Opponens Pollicis
Abductor Pollicis Brevis
Flexor Pollicis Brevis
Adductor Pollicis

Question 2

Short Muscles

Answer 2

Lumbricals
Dorsal Interossei
Palmar Interossei

Question 3

Opponens Pollicis Origin

Answer 3

Flexor Retinaculum

Tubercles of Scaphoid and Trapezium

Question 4

Opponens Pollicis Insertion

Answer 4

Lateral side of 1st Metacarpal

Question 5

Innervation of Opponens Pollicis

Answer 5

Recurrent Branch of Median nerve C8 t1

Question 6

Actions of Opponens Pollicis

Answer 6

Oppose Thumb, it draws 1st Metacarpal Medially to Center of Palm and Rotates it Medially

Question 7

Origin of Abductor Pollicis Brevis

Answer 7

Flexor Retinaculum

Tubercles of Scaphoid and Trapezium

Question 8

Insertion of Abductor Pollicis Brevis

Answer 8

Lateral side of Base of Proximal Phalanx of Thumb

Question 9

Innervation of Abductor Pollicis Brevis

Answer 9

Recurrent branch of Median nerve C8 t1

Question 10

Action of Abductor Pollicis Brevis

Answer 10

Abducts Thumb; helps oppose it

Question 11

Origin of Flexor Pollicis Brevis

Superficial Head and Deep Head

Answer 11

Flexor Retinaculum

Tubercles of Scaphoid and Trapezium

Question 12

Insertion of Flexor Pollicis Brevis

Answer 12

Lateral side of Base of Proximal Phalanx of Thumb

Question 13

Innervation of Flexor Pollicis Brevis

Answer 13

Superficial head: Recurrent Branch of Median Nerve c8 T1

Deep head: Deep Branch of Ulnar Nerve c8 T1

Question 14

Actions of Flexor Pollicis Brevis

Answer 14

Flexes Thumb

Question 15

Origin of Adductor Pollicis

Answer 15

Oblique Head: Bases of 2nd and 3rd Metacarpals, Capitate, Adjacent Carpals
Transverse Head: Anterior Surface of Shaft of 3rd Metacarpal

Question 16

Insertion of Adductor Pollicis

Answer 16

Medial side of Base of Proximal Phalanx of Thumb

Question 17

Innervation of Adductor Pollicis

Answer 17

Deep Branch of Ulnar Nerve c8 T1

Question 18

Actions of Adductor Pollicis

Answer 18

Adducts Thumb toward Lateral border of Palm

Question 19

Origin of Abductor Digiti Minimi

Answer 19

Pisiform

Question 20

Insertion of Abductor Digiti Minimi

Answer 20

Medial side of Proximal Phalanx of 5th finger

Question 21

Innervation of Abductor Digiti Minimi

Answer 21

Deep Branch of Ulnar Nerve c8 T1

Question 22

Actions of Abductor Digiti Minimi

Answer 22

Abducts 5th finger; assists in flexion of its Proximal Phalanx

Question 23

Origin of Flexor Digiti Minimi Brevis

Answer 23

Hook of Hamate

Flexor Retinculum

Question 24

Insertion of Flexor Digiti Minimi Brevis

Answer 24

Medial side of Base of Proximal Phalanx of 5th finger

Question 25

Innervation of Flexor Digiti Minimi Brevis

Answer 25

Deep Branch of Ulnar Nerve c8 T1

Question 26

Actions of Flexor Digiti Minimi Brevis

Answer 26

Flexes Proximal Phalanx of 5th Finger

Question 27

Origin of Opponens Digiti Minimi

Answer 27

Hook of Hamate | Flexor Retinaculum

Question 28

Insertion of Opponens Digiti Mimini

Answer 28

Medial border of 5th Metacarpal

Question 29

Innervation of Opponens Digiti Minimi

Answer 29

Deep Branch of Ulnar Nerve c8 T1

Question 30

Actions of Opponens Digiti Minimi

Answer 30

Draws 5th Metacarpal Anterior and Rotates it, bringing 5th Finger into Opposition with Thumb

Question 31

Origin of Lumbricals

Answer 31

1 and 2: Lateral two tendons of Flexor Digitorum Profundus (as Unipennate muscles) 3 and 4: Medial three tendons of Flexor Digitorum Profundus (as Bipennate Muscles)

Question 32

Insertion of Lumbricals

Answer 32

Lateral sides of Extensor Expansions of 2nd-5th fingers

Question 33

Innervation of Lumbricals

Answer 33

Median Nerve c8 T1

Question 34

Actions of Lumbricals

Answer 34

Flex Metacarpophalangeal joints; Extend Interphalangeal joints of 2nd-5th fingers

Question 35

Origin of Dorsal Interossei 1-4

Answer 35

Adjacent sides of Two Metacarpals (as Bipennate muscles)

Question 36

Insertion of Dorsal Interossei 1-4

Answer 36

Bases of Proximal Phalanges; Extensor Expansions of 2nd-4th fingers

Question 37

Innervations of Dorsal Interossei 1-4

Answer 37

Deep Branch of Ulnar Nerve c8 T1

Question 38

Actions of Dorsal Interossei 1-4

Answer 38

Abduct 2nd-4th fingers from Axial Line; act with Lumbricals in Flexing Metacarpophalangeal joints and Extending Interphalangeal Joints

Question 39

Origin of Palmar Interossei 1-3

Answer 39

Palmar surfaces of 2nd 4th 5th Metacarpals (as Unipennate muscles)

Question 40

Insertion of Palmar Interossei 1-3

Answer 40

Bases of Proximal Phalanges; Extensor Expansions of 2nd 4th 5th fingers

Question 41

Innervation of Palmar Interossei 1-3

Answer 41

Deep Branch of Ulnar Nerve c8 T1

Question 42

Action of Palmar Interossei

Answer 42

Adduct 2nd 4th 5th fingers toward Axial Line; Assist Lumbricals in Flexing Metacarpophalangeal joints and Extending Interphalangeal joints