Posterior Thumb

Question 1

Which two bones form the floor of the anatomical snuffbox

Answer 1

Scaphoid and trapezium

Question 2

Contents of the anatomical snuffbox

Answer 2

The Radial Artery, the cephalic vein and a proportion of the radial nerve

Question 3

Scaphoid fracture

Answer 3

unique blood supply, which runs distal to proximal. A fracture of the scaphoid can disrupt the blood supply to the proximal portion – this is an emergency. Failure to revascularise the scaphoid can lead to avascular necrosis, and future arthritis for the patient.

Question 4

Dorsal Digital Expansion (Extensor hood)

Answer 4

Triangular tendinous aponeurosis that wraps around the dorsum and sides of the head of the metacarpal and the base of the proximal phalanx. Formed from the extensor digitorum tendons.