wrist/ radoiocarpal joint

Question 1

Name/ classification

Answer 1

Synovial condyloid joint

Question 2

Movement

Answer 2

Flexion
Extension
Adduction (ulnar deviation)
Abduction (radial deviation)

Question 3

Degrees of freedom/ planes of movement

Answer 3

2 degrees of freedom in the frontal and sagittal planes

Question 4

Bones/ articulating surface

Answer 4

Radius (distal end)
Proximal row of carpal bones (except pisiform): lunate, scaphoid and triquetrum.

Synovial condyloid joint between the:
Distal radius/ ulna
Proximal row of carpal bones
- 2 rows of 4 carpal bones

Question 5

Cartilage

Answer 5

Hyaline cartilage at articulating surfaces reduces friction and absorbs shock

Question 6

Joint capsule

Answer 6

Capsule is layered (like all synovial)
Fibrous outer layer attaches to radius, ulna and proximal row of carpal bones

Question 7

Synovial membrane

Answer 7

Lines the capsule and secretes synovial fluid which nourishes cartilage, removes waste and reduces friction

Question 8

Ligaments

Answer 8

Palmar radiocarpal ligament
Dorsal radiocarpal ligament
Ulnar collateral ligament
Radial collateral ligament

Question 9

Blood supply

Answer 9

Branches of ulnar and radial arteries

Question 10

Nerve supply

Answer 10

Branches of radial, ulnar and median nerves

Question 11

Muscles (flexion)

Answer 11

Flexor carpi Ulnaris
Flexor carpi radialis
Flexor digitorum superficialis

Question 12

Muscles (extension)

Answer 12

Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor carpi ulnaris
Extensor digitorum

Question 13

Muscles (adduction)

Answer 13

Extensor carpi ulnaris
Flexor carpi ulnaris

Question 14

Muscles (abduction)

Answer 14

Abductor pollicis longus
Flexor carpi radialis longus
Extensor carpi radialis longus
Extensor carpi radialis brevis