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Koukou Tekken-den Tough v05p105
A Boxer's fracture (bar room's fracture) is a fracture of the fourth and/or fifth metacarpal bones transverse neck secondary to an indirect force such as striking an object with a closed fist due to axial loading.


Signs and symptoms Edit

The symptoms are pain and tenderness in the specific location of the hand, which corresponds to the metacarpal bone around the knuckle. When a fracture occurs, there may be a snapping or popping sensation. There will be swelling of the hand along with discoloration or bruising in the affected area. Cuts on the hand are also likely to occur. Movement of the bone may be limited due to the fracture and pain may be inflicted if movement occurs in the specified area. Lastly there could be a misalignment of the finger.


Causes Edit

It doesn’t look like it, but a fist can break pretty easily. If the shots have too much punch, sometimes the hand breaks. Boxer’s fractures are usually caused by the impact of a clenched fist with a skull or a hard, immovable object, such as a wall. The knuckle of the ring finger tends to lead the rest of the knuckles in a hard punch, and the knuckle compresses and snaps the neck of the metacarpal bone. When a boxer punches with proper form, the knuckles of the second and third metacarpal align linearly with the articulating radius, followed linearly by the humerus. As a proper punch makes contact, the force should travel from the rotating body across the humerus, straight across the radius, straight across the second and third metacarpals, finally transferring all the momentum and force from the respective knuckles to the point of contact. Due to the linear articulation of bones, the force is able to travel freely across these joints and bones. However, improper form causes the break to occur at an angle towards the palm, creating a dorsal bump, which ultimately causes the fracture, as the knuckle of the index finger tends to lead the rest of the knuckles in a hard punch, and the knuckle compresses and snaps the neck of the metacarpal bone.

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