Autonomic dysreflexia is most likely to occur in SCI at which neurological level?

Autonomic dysreflexia is most likely to occur in SCI at which neurological level?

• A. T10 and Below
• B. L1 and Below
• C. T8 and Below
• D. T6 and Above

Answer: (D)

Autonomic dysreflexia happens when a noxious or distending stimulus below a spinal cord injury triggers a big, unregulated sympathetic response. This becomes most likely when the injury is at T6 or higher because the brain can no longer modulate those spinal reflexes that control vascular tone below the level of injury.When the reflex is unleashed below the lesion, the vessels there constrict strongly, causing a sudden spike in blood pressure. The body tries to compensate with a parasympathetic response above the level of injury, leading to symptoms like headache, flushing, and sweating above the lesion, but the vasoconstriction below the injury remains unchecked. So, injuries at or above T6 disrupt the critical descending control that normally keeps these reflexes in check, making autonomic dysreflexia more likely than at lower levels.

Autonomic dysreflexia happens when a noxious or distending stimulus below a spinal cord injury triggers a big, unregulated sympathetic response. This becomes most likely when the injury is at T6 or higher because the brain can no longer modulate those spinal reflexes that control vascular tone below the level of injury.When the reflex is unleashed below the lesion, the vessels there constrict strongly, causing a sudden spike in blood pressure. The body tries to compensate with a parasympathetic response above the level of injury, leading to symptoms like headache, flushing, and sweating above the lesion, but the vasoconstriction below the injury remains unchecked. So, injuries at or above T6 disrupt the critical descending control that normally keeps these reflexes in check, making autonomic dysreflexia more likely than at lower levels.