Autonomic Dysreflexia (AD), also known as Autonomic Hyperreflexia, is a potentially life threatening condition where the blood pressure in a person with a spinal cord injury above T5-6 becomes excessively high due to the over activity of the Autonomic Nervous System. The cause of AD is usually a noxious stimuli, that is either pain or irritation or full bladder, which occurs below the level of injury. Once the noxious stimuli is removed AD is relieved.

How AD is caused?