Hand

Question 1

Joint located between metacarpals and phalanges, how many planes?

Answer 1

Metacarpo-phalangeal joint (MCP), two planes

Question 2

Joint located between phalanges, how many planes?

Answer 2

Interphalangeal joint (IP), one plain Digits 2-5 have DIP and PIP

Question 3

Cephalic and basilic veins feed into

Answer 3

Superficial dorsal venous network

Question 4

Answer 4

Extensor retinaculum, a thickening of the antebrachial fascia that holds in place the tendons passing from the forearm into the hand

Question 5

Answer 5

Synovial tendon sheath, covers tendons to reduce friction

Question 6

The tendons of what muscles run together under the extensor retinaculum

Answer 6

1. Abductor pollicis longus and extensor pollicis brevis
2. Extensor carpi radialis longus and brevis
3. Extensor pollicis longus
4. Extensor digitorum and extensor indicis
5. Extensor digiti minimi
6. Extensor carpi ulnaris

Question 7

The tendons of the hands fan out to form:

Answer 7

Distal digital expansions

Question 8

Condition that occurs when an extensor tendon is ruptured at the distap interphalangeal joint,

Answer 8

Mallet finger

Question 9

Answer 9

Question 10

This disorder is the thickening of and shortening of the palmar apaneurosis

Answer 10

Dupuytrene contracture

Question 11

Answer 11

Question 12

Contents of thenar compartment

Answer 12

Thenar muscles that abduct and oppose the thumb (extensor pollicis brevis, abductor pollicis brevis, opponens pollicis), innervated by the recurrent branch of median nerve

Question 13

Answer 13

Question 14

Answer 14

Question 15

Answer 15

Question 16

Contents of central compartment

Answer 16

Tendonds of flexor digitorum superficialis and profundus, lumbricals 1-4

Question 17

Answer 17

Question 18

Components of hypothenar compartment

Answer 18

Hypothenar muscles that flex, abduct, and oppose digit 5 (abductor digiti minimi, flexor digiti minimi brevis, and opponens digiti minimi), innervated by deep branch of ulnar nerve

Question 19

Answer 19

Question 20

Answer 20

Question 21

Answer 21

• Opponensdigitiminimi
• Action: Opposes 5thdigit to thumb
• Proximal attachment: Hook of hamate and flexor retinaculum
• Distal attachment: 5thmetacarpal

Question 22

Answer 22

Question 23

Answer 23

Question 24

Answer 24

Question 25

Potential spaces in the palm

Answer 25

Thenar and midpalmar spaces

Question 26

Answer 26

Carpal tunnel - carpal bones form floor and sides, flexor retinaculum forms roof

Question 27

Contents of carpal tunnel

Answer 27

Fkexor pollicis longus, flexor digitorum superficialis, flexor digitorum profundus, median nerve

Question 28

Answer 28

Question 29

What causes ulnar claw

Answer 29

Ulnar compression paralyzes lumbricals - causes hyperextension of MCP joint (unchecked extensor digitorum) and flexion of IP joint (unopossed flexion of flexor digitorum profundus)

Question 30

What causes the hand of benediction

Answer 30

Damage to median nerve at elbow - flexor digitorum profundus and lateral 2 lumbricals non function so extension of digits 2, 3 when making a fist

Question 31

Actions of ulnar artery

Answer 31

Enters the hand on palmar surface through Guyon's canal (lateral to ulnar nerve), gives rise to the deep palmar branch and continues as the superficial palmar arch, which gives rise to three common palmar digital arteries

Question 32

Actions of radial artery

Answer 32

The radial artery enters the palm through the anatomical snuffbox, where if joins with the deep branch fo the ulnar artery to form the deep palmar arch. The deep arch gives rise to the palmar metacarpal arteries, the princeps pollicis artery, and radial indicis artery

Question 33

Answer 33

Question 34

Hand muscles supplied by radial nerve

Answer 34

NONE, only supplies skin over lateral aspect, half of dorsal part of proximal 1/2 of digitis 1, 2, 3