anatomical snuffbox

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anatomic snuffbox

, anatomical snuffbox
A depression in the skin formed at the posterior base of the thumb when the thumb is extended from the hand. The lateral (outer) wall of the snuff box is formed from the tensed tendons of the abductor pollicis longus and extensor pollicis brevis; the medial wall is formed by the tensed tendon of the extensor pollicis longus; the proximal wall is formed by the styloid process of the radius, and the distal wall is formed by the base of the first metacarpal. Under the floor of the snuff box, the scaphoid and trapezium wrist bones can sometimes be felt, and the radial artery runs under the snuff box as it loops laterally around the thumb.
See: illustration
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
Doyle & Botte (2003) affirmed that the dorsoulnar corner of the anatomical snuffbox contains only the tendon of the ECRL muscle, but in agreement with Tubbs et al.
Along with pain and tenderness in the anatomical snuffbox, the patient has swelling on the radial side of the wrist.
The anatomical snuffbox (AS) is a depression in wrist's radial part, limited by the tendons of abductor longus muscle, extensor pollicis brevis and extensor pollicis longus muscles (Latarjet & Ruiz-Liard, 2007).
Nine years' experience with end-to-end arteriovenous fistula at the 'anatomical snuffbox' for maintenance haemodialysis.
Ischaemia of the index finger and thumb secondary to thrombosis of the radial artery in the anatomical snuffbox. J.

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