The dysfunction caused by spinal cord injury varies depending on the severity of the spinal cord injury and the segment of the injury. The dysfunction caused by spinal cord injury is segmental in nature. If the injury is to the cervical cord, it may cause motor deficits in the limbs below the neck, including defecation. If the spinal cord injury is in the thoracic segment, the movement of the upper extremity is not affected, but may cause motor dysfunction of the lower extremity below the waist, including sensory dysfunction and urinary and bowel dysfunction. If it is in the conus, the main injury is the dysfunction of the second stool.