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. 2024 Jan 29;28(2):120–125. doi: 10.5005/jp-journals-10071-24634
  1. Clinical features occur simultaneously

  2. Episodes are paroxysmal in nature

  3. Sympathetic overactivity to normally non-painful stimuli

  4. Features persist ≥3 consecutive days

  5. Features persist ≥4-week post-injury

  6. Features persist despite treatment of alternative differential diagnosis

  7. Features ≥ episodes daily

  8. Medication administered to decrease sympathetic features

  9. Absence of parasympathetic features during episodes

  10. Absence of other presumed cause of features

  11. Antecedent acquired brain injury