Hand

Question 1

List the groups of intrinsic muscles of the hand

Answer 1

Thenar
Hypothenar
Lumbricals
Interossei
Palmaris brevis
Adductor pollicis

Question 2

List the thenar muscles of the hand

Answer 2

Opponens pollicis
Abductor pollicis brevis
Flexor pollicis brevis

Question 3

What is the origin + insertion of opponens pollicis?

Answer 3

Trapezium, flexor retinaculum

Lateral aspect of thumb

Question 4

What is the nerve + arterial supply to opponens pollicis?

Answer 4

Median nerve

Superficial palmar arch

Question 5

Which movements does opponens pollicis enable?

Answer 5

Thumb: flexion at CMJ (opposition)

Question 6

What is the origin + insertion of abductor pollicis brevis?

Answer 6

Scaphoid, trapezium, flexor retinaculum

Proximal phalanx of thumb

Question 7

What is the nerve + arterial supply to abductor pollicis brevis?

Answer 7

Median nerve

Superficial palmar arch

Question 8

Which movements does abductor pollicis brevis enable?

Answer 8

Thumb: abduction, opposition, extension

Question 9

What is the origin + insertion of flexor pollicis brevis?

Answer 9

Trapezium, flexor retinaculum

Proximal phalanx of thumb

Question 10

What is the nerve + arterial supply to flexor pollicis brevis?

Answer 10

Median nerve

Superficial palmar arch

Question 11

Which movements does flexor pollicis brevis enable?

Answer 11

Thumb: flexion

Question 12

What is the main nerve supply to the thenar muscles?

Answer 12

Median nerve

Question 13

List the hypothenar muscles of the hand

Answer 13

Opponens digiti minimi
Abductor digiti minimi
Flexor digiti minimi brevis

Question 14

What is the origin + insertion of opponens digiti minimi?

Answer 14

Hamate

5th metacarpal

Question 15

What is the nerve + arterial supply to opponens digiti minimi?

Answer 15

Ulnar nerve

Ulnar artery

Question 16

Which movements does opponens digit minimi enable?

Answer 16

Little finger: rotation, opposition

Question 17

What is the origin + insertion of abductor digiti minimi?

Answer 17

Pisiform

Proximal phalanx of 5th digit

Question 18

What is the nerve + arterial supply to abductor digiti minimi?

Answer 18

Ulnar nerve

Ulnar artery

Question 19

Which movements does abductor digiti minimi enable?

Answer 19

Little finger: abduction

Question 20

What is the origin + insertion of flexor digiti minimi brevis?

Answer 20

Hamate

Proximal phalanx of 5th digit

Question 21

What is the nerve + arterial supply to flexor digiti minimi brevis?

Answer 21

Ulnar nerve

Ulnar artery

Question 22

Which movements does flexor digiti minimi enable?

Answer 22

Little finger: flexion

Question 23

What is the main nerve supply to the hypothenar muscles?

Answer 23

Ulnar nerve

Question 24

How many lumbrical muscles are in the hand?

Answer 24

4 (one for each finger)

Question 25

What is the origin + insertion of the lumbricals?

Answer 25

Flexor digitorum profundus tendon | Extensor hood

Question 26

What is the nerve supply to the lumbricals?

Answer 26

``` Median nerve (1-2) UInar nerve (3-4) ```

Question 27

Which movements do the lumbricals enable?

Answer 27

MCPJ: flexion IPJ: extension

Question 28

How many interossei muscles are in the hand?

Answer 28

7 | 4 dorsal, 3 palmar

Question 29

What is the origin + insertion of the interossei?

Answer 29

Metacarpals | Proximal phalanges

Question 30

What is the nerve supply to the interossei?

Answer 30

Ulnar nerve

Question 31

Which movements do the interoessei enable?

Answer 31

Dorsal interossei: abduction at MCPJ Palmar interossei: adduction at MCPJ (PAd DAb)

Question 32

What is the origin + insertion of palmaris brevis?

Answer 32

Palmar aponeurosis | Skin of the palm

Question 33

What is the nerve supply to palmaris brevis?

Answer 33

Ulnar nerve

Question 34

Which movements does palmaris brevis enable?

Answer 34

Hand: improve grip

Question 35

What is the origin + insertion of adductor pollicis?

Answer 35

Capitate, 2nd + 3rd metacarpal | Proximal phalanx of thumb

Question 36

What is the nerve supply to adductor pollicis?

Answer 36

Ulnar nerve

Question 37

Which movements does adductor pollicis enable?

Answer 37

Thumb: adduction

Question 38

A useful mnemonic for the thenar + hypothenar hand muscles: | All For One And One For All

Answer 38

``` Abductor digiti minimi Flexor digiti minimi brevis Opponense digiti minimi Adductor pollicis Opponens pollicis Flexor pollicis brevis Abductor pollicis brevis ```