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Arm Fracture (Definition). An arm fracture typically refers to a fracture of the bone in the upper arm, the humerus or of the bones in the forearm, the radius and/or the ulna. Fractures in the hand and wrist are usually not called arm fractures.et help from a doctor now âº. 8-12 weeks: Depending on type of fracture and location and general condition of host (healthy or multiple medical problems) fracture healing is variable but most heal in 10 weeks with sufficient strength to use normally. ...Read more.
All of these muscles are anchored to the bone of the upper arm, the humerus, by a common tendon, known as the common extensor tendon. These muscles serve primarily to extend the wrist and fingers. Ad. The main muscle that works to straighten the arm by extending the elbow joint is the triceps brachii extensor muscle.ll of these muscles are anchored to the bone of the upper arm, the humerus, by a common tendon, known as the common extensor tendon. These muscles serve primarily to extend the wrist and fingers. Ad. The main muscle that works to straighten the arm by extending the elbow joint is the triceps brachii extensor muscle.