Hand Muscles

Question 1

Thenar Muscles (Abductor Pollicis Brevis, Flexor Pollicis Brevis, Opponens Pollicis)

Answer 1

Origin:
Carpal bones & Flexor retinaculum

Insertion:
Base of proximal phalanx of thumb

Function:
Move thumb

Question 2

Hypothenar Muscles (Abductor Digiti Minimi, Flexor Digiti Minimi Brevis, Opponens Digiti Minimi)

Answer 2

Origin:
Carpal bones & Flexor retinaculum

Insertion:
Base of proximal phalanx of little finger

Function:
Move little finger

Question 3

Lumbricals

Answer 3

Origin:
Tendons of flexor digitorum profundus

Insertion:
Extensor expansions of digits 2-5

Function:
Flex metacarpophalangeal joints & Extend interphalangeal joints of digits 2-5

Question 4

Interossei

Answer 4

Origin:
Metacarpals

Insertion:
Proximal phalanges & Extensor expansions of digits 2-5

Function:
Dorsal: abduct fingers.
Palmar: adduct fingers

Question 5

Adductor Pollicis

Answer 5

Origin:
Transverse head: third metacarpal. Oblique head: capitate & Bases of second & third metacarpals

Insertion:
Base of proximal phalanx of thumb

Function:
Adducts thumb

Question 6

Origin:
Carpal bones & Flexor retinaculum

Insertion:
Base of proximal phalanx of thumb

Function:
Move thumb

Answer 6

Thenar Muscles (Abductor Pollicis Brevis, Flexor Pollicis Brevis, Opponens Pollicis)

Question 7

Origin:
Carpal bones & Flexor retinaculum

Insertion:
Base of proximal phalanx of little finger

Function:
Move little finger

Answer 7

Hypothenar Muscles (Abductor Digiti Minimi, Flexor Digiti Minimi Brevis, Opponens Digiti Minimi)

Question 8

Origin:
Tendons of flexor digitorum profundus

Insertion:
Extensor expansions of digits 2-5

Function:
Flex metacarpophalangeal joints & Extend interphalangeal joints of digits 2-5

Answer 8

Lumbricals

Question 9

Origin:
Metacarpals

Insertion:
Proximal phalanges & Extensor expansions of digits 2-5

Function:
Dorsal: abduct fingers.
Palmar: adduct fingers

Answer 9

Interossei

Question 10

Origin:
Transverse head: third metacarpal. Oblique head: capitate & Bases of second & third metacarpals

Insertion:
Base of proximal phalanx of thumb

Function:
Adducts thumb

Answer 10

Adductor Pollicis