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
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References in periodicals archive ?
The radial artery had normal course in the forearm till the junction between upper two third and lower one third where it turned dorsally and reached the anatomical snuff box and ran superficial to the abductor pollicis longus, extensor carpi radialis brevis and extensor carpi radialis longus along the cephalic vein medially and superficial branch of radial nerve laterally (fig.2).
In primates the radial artery divides into a volar branch, which in the human is represented by a radio palmer branch, and a dorsal branch, which is represented by the normal radial artery, which further divides into superficial and deep branches in relation to the tendons in the anatomical snuff box (8).
The research was realized using terms like "anatomical snuff box" and "fovea radialis".
Aneurysm of the radial artery in the anatomical snuff box. E.
Idiopathic radial artery aneurysm in the anatomical snuff box. Acta Orthop.
There was no tenderness to palpation in the anatomical snuff box. Finkelstein's test, Phalen's test, Tinel's sign, and Hoffman's sign were negative.

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