Movements and muscles of the hand

Question 1

Bones of hand

Answer 1

Carpals –> metacarpals –> phalanges

Question 2

How many lumbrical muscles are there?

Answer 2

4

Question 3

What do lumbrical muscles link?

Answer 3

Extensor and flexor tendons

Question 4

Denneravation of what muscles is the basis for the ‘ulnar claw’ and ‘hand of benediction’?

Answer 4

Lumbrical muscles

Question 5

Action of the lumbricals at joints

Answer 5

Flex MCP joints, extend IP joints

Question 6

Innervation of the lumbricals:

Answer 6

• Lateral 2 (index and middle) = median nerve

- Medial 2 (ring and little) = ulnar nerve

Question 7

Function of muscles of the thenar eminence

Answer 7

Abduction, adduction, extension of thumb

Question 8

Function of muscles of the hypothenar eminence

Answer 8

Abduction, adduction, extension of little finger

Question 9

Nerve supply of the thenar eminence

Answer 9

Median nerve

Question 10

Nerve supply of the hypothenar eminence

Answer 10

Ulnar nerve

Question 11

Thenar muscles (3):

Answer 11

1. Opponens Pollicis
2. Abduction pollicis brevis
3. Flexor pollicis brevis

Question 12

Hypothenar muscles (3):

Answer 12

1. Opponens digiti minimi
2. Abductor digiti minimi
3. Flexor digiti minimi brevis

Question 13

Interrossei muscles can be divided into:

Answer 13

• Dorsal branch

- Palmar branch

Question 14

Function of dorsal interorssei (DAB)

Answer 14

Abbduction

Question 15

Which thenar muscle is supplies by the ulnar nerve?

Answer 15

Adductor pollicis

Question 16

The hand of benediction occurs in what type of nerve injury?

Answer 16

Median nerve

Question 17

Claw hand occurs in what type of nerve injury?

Answer 17

Ulnar nerve

Question 18

Wrist drop occurs in what type of nerve injury?

Answer 18

Radial nerve

Question 19

Hand of benediction can be seen when the patient is asked to…

Answer 19

Make a fist

Question 20

What happens to the fingers in the ulnar claw.

Answer 20

hyperextension at MCP joints, flexion of IP joints

Question 21

How many digital nerves are there per vessel?

Answer 21

4 (2 palmar, 2 dorsal)