Boost Your Skills with 2026's NM3 Spinal Cord Injury Challenge – Master Your Neural Know-How!

Autonomic dysreflexia happens when a warning signal below the level of spinal injury triggers an unmodulated sympathetic surge, causing a sudden, dangerous rise in blood pressure. The higher the level of injury, the more the brain’s descending control is lost over the sympathetic outflow to the body below the lesion. When the injury is at or above T6, this regulatory brake is disrupted for the major vascular beds below the injury, so a relatively small noxious stimulus (like a full bladder or bowel distention) can provoke a large, unopposed vasoconstrictive response. That makes injuries at T6 and above the highest-risk scenario. Below that level, some autonomic regulation remains intact, so the risk is much lower. Promptly identifying and removing triggers, and managing the blood pressure, is essential in these cases.