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Autonomic Hyperactivity

Definition

Autonomic hyperactivity may manifest as sympathetic hyperactivity, parasympathetic hyperactivity or both.

These most often occur in the context of acute brain injury resulting in loss of inhibition or irritation of excitatory foci within the central autonomic network.

Centrally mediated sympathetic hyperactivity is also seen in chronic spinal cord injury (Autonomic dysreflexia).

Sympathetic or parasympathetic hyperactivity are