Palm of the Hand Muscles

Question 1

Adductor Pollicis Brevis

Origin

Answer 1

-Flexor rentinaculum and tubercles of scaphoid and trapezium

Question 2

Adductor Pollicis Brevis

Insertion

Answer 2

-Lateral side of base of proximal phalanx of thumb

Question 3

Adductor Pollicis Brevis

Innervation

Answer 3

-Recurrent branch of median nerve (C8, T1)

Question 4

Adductor Pollicis Brevis

Action

Answer 4

• Abducts thumb

- Opposes thumb

Question 5

Opponens Pollicis

Origin

Answer 5

-Flexor rentinaculum and tubercles of scaphoid and

trapezium

Question 6

Opponens Pollicis

Insertion

Answer 6

-Lateral side of 1st metacarpal

Question 7

Opponens Pollicis

Innervation

Answer 7

-Recurrent branch of median nerve (C8, T1)

Question 8

Opponens Pollicis

Action

Answer 8

-Opposes thumb

Question 9

Flexor Pollicis Brevis

Origin

Answer 9

-Flexor rentinaculum and tubercles of scaphoid and

trapezium

Question 10

Flexor Pollicis Brevis

Insertion

Answer 10

-Lateral side of base of proximal phalanx of thumb

Question 11

Flexor Pollicis Brevis

Innervation

Answer 11

-Superficial head: recurrent branch of median nerve
(C8, T1)
-Deep head: deep branch ofulnar nerve (C8, T1)

Question 12

Flexor Pollicis Brevis

Action

Answer 12

-Flexes MCP of 1st digit (thumb)

Question 13

Flexor Digiti Minimi Brevis

Origin

Answer 13

-Hook of hamate and flexor rentinaculum

Question 14

Flexor Digiti Minimi Brevis

Innervation

Answer 14

-Medial side of base of proximal phalanx of 5th digit

Question 15

Flexor Digiti Minimi Brevis

Insertion

Answer 15

-Deep branch of ulnar nerve (C8, T1)

Question 16

Flexor Digiti Minimi Brevis

Action

Answer 16

-Flexes MCP of 5th digit

Question 17

Abductor Digiti Minimi

Origin

Answer 17

-Pisiform

Question 18

Abductor Digiti Minimi

Insertion

Answer 18

-Medial side of base of proximal phalanx of 5th digit

Question 19

Abductor Digiti Minimi

Innervation

Answer 19

-Deep branch of ulnar nerve (C8, T1)

Question 20

Abductor Digiti Minimi

Action

Answer 20

-Abducts & flexes MCP of 5th digit

Question 21

Opponens Digiti Minimi

Origin

Answer 21

-Hook of hamate and flexor rentinaculum

Question 22

Opponens Digiti Minimi

Insertion

Answer 22

-Medial border of 5th metacarpal

Question 23

Opponens Digiti Minimi

Innervation

Answer 23

-Deep branch of ulnar nerve (C8, T1)

Question 24

Opponens Digiti Minimi

Action

Answer 24

-Opposes 5th digit

Question 25

Palmaris Brevis | Origin

Answer 25

-Palmar aponeurosis

Question 26

Palmaris Brevis | Insertion

Answer 26

-Skin of hand on ulnar side

Question 27

Palmaris Brevis | Innervation

Answer 27

-Superficial branch of ulnar nerve (C8, T1)

Question 28

Palmaris Brevis | Action

Answer 28

-Tenses skin of palmar fascia

Question 29

Adductor Pollicis | Origin

Answer 29

-Oblique head: base of 2nd and 3rd metacarpals; trapezoid & capitate -Transverse head: anterior surface of 3rd metacarpal

Question 30

Adductor Pollicis | Insertion

Answer 30

-Medial side of base of proximal phalanx of thumb

Question 31

Adductor Pollicis | Innervation

Answer 31

-Deep branch of ulnar nerve (C8, T1)

Question 32

Adductor Pollicis | Action

Answer 32

-Adducts thumb

Question 33

Lumbricals (1st & 2nd) | Origin

Answer 33

-Lateral two tendons of flexor digitorum profundus | as unipennate muscles

Question 34

Lumbricals (1st & 2nd) | Insertion

Answer 34

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

Question 35

Lumbricals (1st & 2nd) | Innervation

Answer 35

-Median nerve (C8, T1)

Question 36

Lumbricals (1st & 2nd) | Action

Answer 36

-Flexes MCP joints and extends IP joints of 2nd-3rd | digits

Question 37

Lumbricals (3rd & 4th) | Origin

Answer 37

-Medial three tendons of flexor digitorum profundus | as bipennate muscles

Question 38

Lumbricals (3rd & 4th) | Insertion

Answer 38

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

Question 39

Lumbricals (3rd & 4th) | Innervation

Answer 39

-Deep branch of ulnar nerve (C8, T1)

Question 40

Lumbricals (3rd & 4th) | Action

Answer 40

-Flexes MCP joints and extends IP joints of 4th-5th | digits

Question 41

``` Dorsal Interossei (1st - 4th) Origin ```

Answer 41

-Adjacent sides of two metacarpals (as bipennate | muscles)

Question 42

``` Dorsal Interossei (1st - 4th) Insertion ```

Answer 42

-Bases of proximal phalanges and extensor expansions of 2nd-4th digits

Question 43

``` Dorsal Interossei (1st - 4th) Innervation ```

Answer 43

-Deep branch of ulnar nerve (C8, T1)

Question 44

``` Dorsal Interossei (1st - 4th) Action ```

Answer 44

-Abducts 2nd-4th digits from axial line; -Acts with lumbricals to flex MCP joints and extend IP joints -1st dorsal interosseous adducts thumb

Question 45

``` Palmer Interossei (1st - 3rd) Origin ```

Answer 45

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

Question 46

``` Palmer Interossei (1st - 3rd) Insertion ```

Answer 46

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

Question 47

``` Palmer Interossei (1st - 3rd) Innervation ```

Answer 47

-Deep branch of ulnar nerve (C8, T1)

Question 48

``` Palmer Interossei (1st - 3rd) Action ```

Answer 48

-Adducts 2nd, 4th , and 5th digits toward axial line; -Acts with lumbricals to flex MCP joints and extend IP joints