Autonomic dysreflexia typically occurs with spinal lesions **above T6,**
and is characterized by paroxysmal hypertensive crises associated with throbbing headaches, mydriasis, blurred vision, nasal stuffiness, diaphoresis, cutaneous flushing above the level of the lesion, bradycardia, apprehension, and anxiety.
a stimulus below the lesion and can lead to an uninhibited sympathetic activity, as a result of lack of modulation from higher cerebral centers.

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