| 释义 |
anatomic snuffbox
an·a·tom·ic snuff·box (an'ă-tom'ik snŭf'boks), A hollow seen on the radial aspect of the wrist when the thumb is extended fully; it is bounded by the prominences of the tendon of the extensor pollicis longus posteriorly and of the tendons of the extensor pollicis brevis and abductor pollicis longus anteriorly. The radial artery crosses the floor that is formed by the scaphoid and the trapezium bones. Synonym(s): tabatière anatomiqueA triangular depression on the dorsal pollicar aspect of the hand when the thumb is fully extendedan·a·tom·ic snuff·box (an'ă-tom'ik snŭf'boks) A hollow seen on the radial aspect of the wrist when the thumb is extended fully.  ANATOMIC SNUFFBOXanatomic snuffbox, anatomical snuffboxA 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 |