The review summarizes information on the stages of independent assessments of the cause of patient death, presented in 1861 by Prosper Menier. The possibility of the presence of a symptom complex unknown to the author, characteristic of intracranial hypotension syndrome, is emphasized. Attention is drawn to the symptomatic similarity of neurological and common ENT diseases different in etiopathogenesis. The rarity of the onset of reduced intracranial pressure syndrome is questioned. Risk factors for intracranial hypotension syndrome are mentioned. A hypothetical justification of the cause of death in Prosper Menier is proposed.