Useless fact
What is the depression at the base of the thumb called?
The triangular depression on the side of the hand at the base of the thumb is anatomically called the anatomical snuffbox.
The anatomical snuffbox, or fossa radialis, is a triangular depression located on the lateral aspect of the dorsum of the hand, specifically at the base of the thumb. The name originates from the historical practice of placing powdered tobacco, or snuff, in this hollow before inhaling it through the nose. The boundaries of this space are formed by the tendons of the thumb muscles, namely the extensor pollicis longus, extensor pollicis brevis, and abductor pollicis longus. Beneath the floor of the snuffbox lie the radial artery, the scaphoid bone, and the trapezium bone. Clinically, this area is highly significant because tenderness here after a fall on an outstretched hand often indicates a fracture of the scaphoid bone, which is the most commonly fractured carpal bone. Despite its crucial diagnostic role in modern medicine, its colloquial and anatomical name remains a whimsical historical nod to a bygone social habit.
Why this is true — The anatomical term for this region of the hand is the anatomical snuffbox, historically used for snorting snuff tobacco.
Sources
- Anatomy, Shoulder and Upper Limb, Hand Anatomical Snuffbox StatPearls Publishing