Forearm/Wrist

Question 1

Describe movement of radius during pronation

Answer 1

Radius crosses anterior to ulna

Question 2

Lister’s Tubercle

Answer 2

Dorsal distal radius, in line with middle finger

Directs line of force for EPL to 45 degrees to form boundary of snuffbox

Question 3

Radial Styloid

Answer 3

Cancellous bone - Prone to fractures
Extremely painful because of proximity of dorsal radial sensory nerve
Radial collateral ligament attachment

Question 4

Ulnar Styloid

Answer 4

Associated with the triangular fibrocartilage complex (TFCC), ECU tendon, ulnar collateral ligament attacments

Question 5

Radial Inclination

Answer 5

22 degrees toward ulna

Favors ulnar deviation

Question 6

Distal radius Volar Tilt

Answer 6

11 degrees toward palm

Favors flexion over extension

Question 7

Scaphoid

Answer 7

In anatomical snuffbox, prominent with ulnar deviation
Surface is 80% articular cartilage –> OA common
Retrograde perfusion –> slow healing/ malunion

Question 8

Keinbock’s

Answer 8

Avascular necrosis of lunate

Question 9

Pisiform

Answer 9

Sesamoid in FCU tendon

Question 10

Capitate

Answer 10

Axis of wrist motion