Wrist Joint

Question 1

Name and classify

Answer 1

Synovial condyloid joint

Question 2

Bones

Answer 2

Radius - distal end
Carpal bones - proximal row (except pisiform)

Question 3

Cartilage

Answer 3

Hyaline cartilage - friction free movement and shock absorber

Question 4

Additional features

Answer 4

Triangular Fibrocartilage disc - O: medial border of distal radius, I: base of ulna styloid, function: stabiliser of distal radioulnar joint and ulnocarpal stability
Retinaculum - prevent bowstringing

Question 5

Capsule

Answer 5

Attached to articular margins
From radius to ulna and proximal row of carpal bones
Supported by collateral, palmar and dorsal ligaments

Question 6

Synovial membrane

Answer 6

Lines capsule
Synovial fluid - nourishes cartilage, removes waste, reduces friction

Question 7

Ligaments

Answer 7

Palmar and dorsal Radiocarpal ligaments
Ulna and radial collateral ligaments

Question 8

Degrees of freedom

Answer 8

Two

Question 9

Movements

Answer 9

Flexion
Extension
Radial and ulna deviation

Question 10

Blood supply

Answer 10

Branches of the ulna and radial arteries
Median artery

Question 11

Nerve supply

Answer 11

Branches of the median nerve, radial nerve and ulnar nerve

Question 12

Muscles - flexors

Answer 12

Flexor carpi Ulnaris
Flexor carpi Radialis
Palmaris longus
Flexor Digitorum Superficialis
Flexor Digitorum Profundus
Flexor pollicis longus

Question 13

Muscles - extensors

Answer 13

Extensor carpi Radialis longus
Extensor carpi Radialis brevis
Extensor carpi Ulnaris
Extensor Digitorum
Extensor pollis longus
Extensor indicis
Extensor pollicis brevis
Abductor pollicis longus