Stage | Clinical | Reflexes | Neurologic signs |
No encephalopathy (stage 0) | Normal | Normal | None |
Early (stage I and II) | Inconsolable crying, sleep reversal, inattention to task, child is not acting like self to parents | Unreliable/ normal or hyperreflexic | Untestable |
Mid (stage III) | Somnolence, stupor, combativeness | Unreliable/ hyperreflexic | Likely untestable |
Late (stage IV) | Comatose, arouses with painful stimuli (stage IVa) or no response (stage IVb) | Absent | Decerebrate or decorticate |
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