Spinal cord injuries (SCIs) are diverse because the spinal cord is made up of many segments that control different parts of the body. Each segment has specific areas of skin and muscle it influences, called dermatomes, so an injury can affect various functions depending on where it occurs. For example, injuries in the cervical region can lead to quadriplegia (loss of function in all four limbs), while those in the thoracic or lumbar regions usually cause paraplegia (loss of function in the legs).