Muscles of Intrinsic Hand

Question 1

Name the Origin, Insertion, Action, and Nerve for:

Lumbricals (1-4)

Answer 1

O: Tendons of Flexor Digitorum Profundus (radial side)

I: Dorsal Digital Expansion 2-5

A: Flex MCP, Ext IP

N: Median N (1-2), Deep Ulnar N ( 3-4)

Question 2

Name the Origin, Insertion, Action, and Nerve for:

Dorsal Interossei (1-4)

Answer 2

O: 1st - 5th MC (two heads from adjacent sides)

I: Base of 2-4th proximal phalanges

A: ABD 2-4 MCP, (Flex 2-4 MCP)

N: Deep Ulnar N

Question 3

Name the Origin, Insertion, Action, and Nerve for:

Palmar Interossei (1-3)

Answer 3

O: 1 - ulnar side of 2nd MC, 2 - Radial side of 4th MC, 3 - Radial side of 5th MC

I: Bose of the associated 2nd, 4th, 5th Prox Phalange

A: ADD 2,4,5 MCP (Flex 2,4,5 MCP)

N: Deep Ulnar N

Question 4

Name the Origin, Insertion, Action, and Nerve for:

Abductor Pollicis Brevis

Answer 4

O: Flexor retinaculum

I: Base of 1st PP

A: ABD 1st CMC

N: Recurrent Median N

Question 5

Name the Origin, Insertion, Action, and Nerve for:

Adductor Pollicis - Transverse

Answer 5

O: 3rd MC

I: Base 1st PP

A: ADD 1st CMC, (Flex 1st MCP)

N: Deep Ulnar N

Question 6

Name the Origin, Insertion, Action, and Nerve for:

Adductor Pollicis - Oblique

Answer 6

O: 2nd MC (capitate)

I: Base 1st PP

A: ADD 1st CMC, (Flex 1st MCP)

N: Deep Ulnar N

Question 7

Name the Origin, Insertion, Action, and Nerve for:

Flexor Pollicis Brevis

Answer 7

O: Flexor retinaculum

I: Base 1st PP

A: Flex 1st CMC/MCP

N: Recurrent Median N

Question 8

Name the Origin, Insertion, Action, and Nerve for:

Opponens Pollicis

Answer 8

O: Trapezium

I: 1st MC

A: Opposition of thumb

N: Recurrent Median N

Question 9

Name the Origin, Insertion, Action, and Nerve for:

Abductor Digiti Minimi

Answer 9

O: Pisiform

I: Base of 5th PP

A: ABD 5th MCP

N: Deep Ulnar N

Question 10

Name the Origin, Insertion, Action, and Nerve for:

Flexor Digiti Minimi

Answer 10

O: Hook of Hamate

I: Base of 5th PP

A: Flex 5th MCP

N: Deep Ulnar N

Question 11

Name the Origin, Insertion, Action, and Nerve for:

Opponens Digiti Minimi

Answer 11

O: Hook of Hamate

I: 5th MC

A: Opposition of 5th MC

N: Deep Ulnar N

Question 12

Name the Origin, Insertion, Action, and Nerve for:

Palmaris Brevis

Answer 12

O: Palmar Aponeurosis

I: Skin of hypothenar eminence

A: Tenses skin of palm

N: Superficial Ulnar N