The scapula, or shoulder
blade, are the two wide, flat bones, roughly triangular in shape, located in the upper back area behind the shoulders
. They consist of three ridged edges: the lateral glenoid cavity joining with the humerus
, the bone connecting the shoulder to the elbow
; the acromion located above the glenoid cavity, which joins with the clavicle, the bone at the top of the spine
; and the coracoid process. There are few problems that can affect
the scapula, except for rare fractures caused by particularly violent impacts, in which cases the arm
must be immobilized for nearly a month in order to let the fracture heal.