单词	anatomical snuffbox
释义	anatomical snuffbox anatomical snuffbox n (Anatomy) the triangular depression on the back of the hand between the thumb and the index finger anatomical snuffbox ANATOMIC SNUFFBOX anatomic 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
随便看	iakov roginskii iakov romanovich kovalenko iakov romas iakov rostovtsev iakov rylskii iakov samoilov iakov sannikov iakov segel iakov semenovich gogebashvili iakov semenovich kiselev iakov semenovich sheinkman iakov shakhovskoi iakov shchogolev iakov shebselevich shur iakov sheinkman iakov shumskii iakov shur iakov shusherin iakov slashchov iakov smushkevich iakov stefanovich iakov stepanovich esipov iakov stepanovich stepovoi iakov stepovoi iakov sverdlov

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