What is the anatomical snuff-box and where is it located?

The anatomical snuff-box is an elongated, triangular depression visible on the lateral dorsum of the hand when the thumb is hyperextended.

What are the boundaries of the anatomical snuff-box?

Its boundaries are: anterolateral - abductor pollicis longus and extensor pollicis brevis tendons; posteromedial - extensor pollicis longus tendon; floor - scaphoid and trapezium bones; roof - skin and superficial fascia.

What structures are found inside the anatomical snuff-box?

The main structure within the snuff-box is the radial artery, which lies deep on the floor.

What superficial structures cross the roof of the anatomical snuff-box?

The cephalic vein runs from medial to lateral, and the superficial branch of the radial nerve passes from lateral to medial.

Why is the anatomical snuff-box clinically important?

It's clinically important because: the radial artery pulse is palpable here; tenderness can indicate scaphoid fracture; the cephalic vein provides IV access; and the superficial radial nerve can be tested here.

How can you palpate the radial artery in the anatomical snuff-box?

The radial artery is easily palpable in the snuff-box, making it a reliable site for checking the pulse.

What injury is associated with tenderness in the anatomical snuff-box?

Tenderness in this area is a classic sign of a scaphoid fracture, as the scaphoid bone forms part of the floor.

Anatomical Snuffbox – Boundaries, Contents & Clinical Use

❓ Frequently Asked Questions