9. Hand muscles Flashcards Preview

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Flashcards in 9. Hand muscles Deck (15)
1

Hand muscles

1. thenar
2. hypothenar
3. dorsal interossei
4. palmar interossei
5. lumbricals

2

hand muscles - function of lumbricals

flex MCP and extend DIP and PIP joints

3

hand muscle - dorsal interossei action

abduct the fingers

4

hand muscles - palmar interossei action

adduct the fingers

5

hand muscles - thenar muscles action

oppose abduct and flex

6

hand muscles - hypothenar mucles action

oppose abduct and flex

7

thenar muscles - names

1. opponens pollicis
2. abductor pollicis brevis
3. flexor pollicis brevi
4. superficial head ( deep head by ulnar nerve )

8

hypothenar muscles - names

1. opponens digit minimi
2. abductor digit minimi
3. flexor digit minimi brevis

9

lesion on the posterior cords of branchial plexun

wrist drop

10

musculocutaneous injury - loss of senseation

lateral forearm

11

• A man injures the recurrent branch of his median nerve. Which muscles become denervated?

Opponens pollicis, Abductor pollicis, Flexor pollicis brevis (Oppose, Abduct, and Flex = OAF)

12

• What three muscles compose the hypothenar eminence?

The thenar muscles = Opponens pollicis, Abductor pollicis, Flexor pollicis brevis (Oppose, Abduct, and Flex = OAF)

13

• A patient completely loses his ability to adduct his fingers. What group of muscles is not working properly?

Palmar interossei muscles (PAd = Palmars Adduct)

14

• A patient completely loses his ability to abduct his fingers. What group of muscles is not working properly?

Dorsal interossei muscles (DAb = Dorsals Abduct)

15

• What is the function of the lumbrical muscles?

To flex at the MCP joint and extend PIP and DIP joints

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