Quadriplegia, also known as tetraplegia,'s a symptom in which a human experiences the loss of use of all of his/her limbs. This often includes both sensation and control. Causes It's caused by damage to the brain or the spinal cord at a high level - in particular spinal cord injuries secondary to an injury to the cervical spine. The injury, known as a lesion, causes victims to lose partial or total mobility of all four limbs, meaning the arms and the legs. Typical causes of this damage are tra… (More on Quadriplegia)