Spinal cord injuries caused by trauma to the vertebral column, thereby affecting the spinal cord's ability to send and receive messages from the brain to the body's systems that control sensory, motor and autonomic function below the level of injury. Motor vehicle accidents are the leading cause of SCI. in younger individuals, while falls are the leading cause for SCI for people over 65. Acts of violence and sports/recreation activities are other common causes for these injuries. A complete SCI produces total loss of all motor and sensory function below the level of injury. Nearly 50% of all SCIs are complete. Both sides of the body are equally affected. loss of function is caused by a contusion or bruise to the spinal cord or by compromise of blood flow to the injured part of the spinal cord. In an incomplete SCI, some function remains below the primary level of the injury. A person with an incomplete injury may be able to move one arm or leg more than the other or may have more functioning on one side of the body than the other. SCIs are graded according to the American Spinal Injury Association (ASIA) grading scale, which describes the severity of the injury.