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Jersey Finger
The Jersey Finger is a finger-related injury that is common in athletics and can result in permanent loss of flexion of the end of the finger if not surgically repaired.
==Anatomy==
All four non-thumb digits (index finger, middle finger, ring finger and little finger) contain three bones called the ''phalanges'' that are aligned in a linear row like box cars in a train. These bones are designated the proximal phalanx (closest to the palm), the middle phalanx and the distal phalanx (farthest from the palm). The joints between these bones are referred to as the proximal interphalangeal joint (PIP, between the proximal and middle phalanx) and the distal interphalangeal joint (DIP, between the middle and distal phalanx). Large muscles in the forearm send long tendons to the fingers and these tendons attach at specific points on these bones. Flexing and extending these digits occurs when these muscles contract and their tendons pull on their bony attachments. The deepest of the flexor muscles in the anterior forearm is called the flexor digitorum profundus muscle (FDP); it gives off four tendons that travel through the carpal tunnel into the hand and attach to the distal phalanx in each of the four non-thumb digits.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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