The first clue an EMT has to the possibility of a spinal cord injury is the of . Knowing the stacked nature of the vertebrae will allow the EMT to imagine the injuries. In a motor vehicle collision, the most common injury type is of the neck. Falls can result in bones that intrude into the cord, or fractures that actually crush the vertebrae. The phenomenon known as, , can cause trauma along the spinal column, especially in the lumbar region. Firearms can lead to spinal injuries due to the uncertainty of the of of the bullet. Sports injuries may also cause spinal injury.