Other tests may be done to check for related injuries: Arteriography or CT angiography to check for suspected arterial injuries (commonly done to evaluate the popliteal artery when the knee is dislocated) Electromyography and / or nerve conduction studies (rarely done immediately; more typically done when nerve symptoms persist weeks to months after the injury) Fracture description A fracture's appearance on x-rays can be described relatively precisely using the following terms: Type of fracture line (see figure Common types of fracture lines) Location of fracture line Displacement (see figure Spatial relationship between fracture fragments) Open or closed Terms for fracture location include Dorsal or volar Epiphysis (sometimes involving the articular surface), which can refer to the proximal end of the bone (the head) or the distal end Metaphysis (neck—the part of a long bone between the epiphysis and diaphysis) Diaphysis (shaft, divided into the proximal, middle, or distal third) Common types of fracture lines Transverse fractures are perpendicular to the long axis of a bone.