This direction of flow is found in most bones in the arms and legs, with the blood running from the part of the bone that is closest to the body to the part of the bone that is closest to the fingers or toes. Throughout the body, blood runs from the heart to the extremities (arms and legs) - from close to the body (proximal) to the fingers and toes (distal). The red arrows indicate the location of the anatomic snuffbox.Īs mentioned above, the scaphoid has a poor blood supply. Photograph and X-ray showing the location of the scaphoid in the wrist. Often referred to as the "anatomic snuffbox," this area is typically where you feel the most tenderness or pain when a scaphoid fracture occurs. It is located at the base of the hollow made by the thumb tendons on the back of the wrist. The scaphoid bone can most easily be identified when your thumb is held in a "hitch-hiking" or "thumbs-up" position. Smooth and unrestricted (free) motion of the scaphoid is necessary to allow for optimal motion of the wrist. The scaphoid is especially important to wrist function because it links the proximal row of carpal bones (the bones closer to the radius and ulna) to the distal row of carpal bones (the bones closer to the fingers). The word "scaphoid" comes from the Greek term for "boat." The scaphoid bone resembles a boat with its relatively long and curved shape. The bone is important for both motion and stability of the wrist joint. The scaphoid bone is one of the carpal bones on the thumb side of the wrist, just above the radius. Rosemont, IL, American Academy of Orthopaedic Surgeons, 2010. Reproduced from JF Sarwark, ed: Essentials of Musculoskeletal Care, ed 4. The scaphoid is one of the small carpal bones in the wrist.
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