Intricate Muscles of the Hand

Question 1

What are the Thenar Compartment Muscles?

Answer 1

1. Opponens Pollicis
2. Abductor Pollicis Brevis
3. Flexor Pollicis Brevis

Question 2

What are the Adductor Compartment Muscles?

Answer 2

1. Adductor Pollicis

Question 3

What are the Hypothenar Compartment Muscles?

Answer 3

1. Abductor Digiti Minimi
2. Flexor Digiti Minimi Brevis
3. Opponens Digiti Minimi

Question 4

What are the Central Compartment Muscles?

Answer 4

Lumbricals 1-4

Question 5

What are the Interosseous Compartment Muscles?

Answer 5

1. Dorsal Interossei 1-4

2. Palmar Interossei 1-3

Question 6

Opponens Pollicis - O

Answer 6

Flexor retinaculum and tubercles of scaphoid and trapezium

Question 7

Opponens Pollicis - I

Answer 7

Lateral side of 1st metacarpal

Question 8

Opponens Pollicis - N

Answer 8

Median Nerve

Question 9

Opponens Pollicis - A

Answer 9

Oppose thumb, draws 1st metacarpal medially to center of palm, rotates it medially.

Question 10

Abductor Pollicis Brevis - O

Answer 10

Flexor retinaculum and tubercles of scaphoid and trapezium

Question 11

Abductor Pollicis Brevis - I

Answer 11

Lateral side of base of proximal phalanx of thumb.

Question 12

Abductor Pollicis Brevis - N

Answer 12

Median Nerve

Question 13

Abductor Pollicis Brevis - A

Answer 13

ABducts Thumb, helps oppose it.

Question 14

Flexor Pollicis Brevis - O

Answer 14

Flexor retinaculum and tubercles of scaphoid and trapezium

Question 15

Flexor Pollicis Brevis - I

Answer 15

Lateral side of base of proximal phalanx of thumb.

Question 16

Flexor Pollicis Brevis - N Superficial Head

Answer 16

Median Nerve

Question 17

Flexor Pollicis Brevis - N Deep Head

Answer 17

Ulnar Nerve

Question 18

Flexor Pollicis Brevis - A

Answer 18

Flexes Thumb

Question 19

Adductor Pollicis - O Oblique Head

Answer 19

Base of 2nd and 3rd metacarpals, capitate, adjacent carpals.

Question 20

Adductor Pollicis - O Transverse Head

Answer 20

Anterior surface of shaft of 3rd metacarpal.

Question 21

Adductor Pollicis - I

Answer 21

Medial side of base of proximal phalanx of thumb

Question 22

Adductor Pollicis - N

Answer 22

Ulnar

Question 23

Adductor Pollicis - A

Answer 23

Adducts thumb toward lateral border of palm

Question 24

Abductor Digiti Minimi - O

Answer 24

Pisiform

Question 25

Abductor Digiti Minimi - I

Answer 25

Medial side of base of proximal phalanx of 5th finger

Question 26

Abductor Digiti Minimi - N

Answer 26

Ulnar

Question 27

Abductor Digiti Minimi - A

Answer 27

Abducts 5th finger; assists in flexion of its promixal phalanx.

Question 28

Flexor Digiti Minimi Brevis - O

Answer 28

Hook of hamate and flexor retinaculum.

Question 29

Flexor Digiti Minimi Brevis - I

Answer 29

Medial side of base of proximal phalanx of 5th finger

Question 30

Flexor Digiti Minimi Brevis - N

Answer 30

Ulnar

Question 31

Flexor Digiti Minimi Brevis - A

Answer 31

Flexes proximal phalanx of 5th finger.

Question 32

Opponens Digiti Minimi - O

Answer 32

Hook of hamate and flexor retinaculum.

Question 33

Opponens Digiti Minimi - I

Answer 33

Medial border of 5th metacapal

Question 34

Opponens Digiti Minimi - N

Answer 34

Ulnar

Question 35

Opponens Digiti Minimi - A

Answer 35

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

Question 36

Lumbricals (1-2) - O

Answer 36

Lateral 2 tendons of flexor digitorum profundus (as unipennate muscles)

Question 37

Lumbricals (1-2) - I

Answer 37

Lateral sides of extensor expansions of 2nd-3rd fingers

Question 38

Lumbricals (1-2) - N

Answer 38

Median

Question 39

Lumbricals (1-2) - A

Answer 39

Flex metacarpophalangeal joints; extends interphalangeal joint of 2nd-3rd fingers.

Question 40

Lumbricals (3-4) - O

Answer 40

Medial 3 tendons of flexor digitorum profundus (as bipennate muscles)

Question 41

Lumbricals (3-4) - I

Answer 41

Lateral sides of extensor expansions of 4th-5th fingers

Question 42

Lumbricals (3-4) - N

Answer 42

Ulnar

Question 43

Lumbricals (3-4) - A

Answer 43

Flex metacarpophalangeal joints; extends interphalangeal joint of 4th-5th fingers.

Question 44

Dorsal Interossei (1-4) - O

Answer 44

Adjacent sides of two metacarpals (as bipennate muscles)

Question 45

Dorsal Interossei (1-4) - I

Answer 45

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

Question 46

Dorsal Interossei (1-4) - N

Answer 46

Ulnar

Question 47

Dorsal Interossei (1-4) - A

Answer 47

Abduct 2nd-4th fingers from axial line; act with lumbricals in flexing metacarophalangeal joints and extending interphalangeal joints. (Palming a ball while looking at DORSAL side).

Question 48

Palmar Interossei (1-3) - O

Answer 48

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

Question 49

Palmar Interossei (1-3) - I

Answer 49

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

Question 50

Palmar Interossei (1-3) - N

Answer 50

Ulnar

Question 51

Palmar Interossei (1-3) - A

Answer 51

Adduct 2nd, 4th, and 5th fingers toward axial line; assist lumbricals. (Holding a Cup of water in hand).