MUSCLE PHYSIOLOGY

Detailed explanation-1: -Clavicle fractures are most often caused by a direct blow to the shoulder. This can happen during a fall onto the shoulder or an accident, like a car collision. A fall onto an outstretched arm can also cause a clavicle fracture. In a baby, a clavicle fracture can occur during the passage through the birth canal.

Detailed explanation-2: -Midshaft fractures account for approximately 75 to 80 percent of all clavicle fractures and typically occur in younger persons. Distal third fractures represent about 15 to 25 percent of clavicle fractures. Medial third fractures are least common, accounting for less than 5 percent of clavicle fractures.

Detailed explanation-3: -Type 3 fracture is where there is non-displacement of the fracture but it extends into the acromioclavicular joint. Again, these fractures are treated non-surgically. However, late AC degenerative changes can occur and may require excision of the distal clavicular segment.