|
Medical Definition of Polioencephalitis infectiva
1. A unique encephalitis, presumably viral in origin, which followed the influenza pandemic of 1914-1918. Symptoms included ophthalmoplegia and marked somnolence, and in many survivors, the delayed development of Parkinson's disease; the basis for postencephalitic Parkinsonism. Synonym: encephalitis lethargica, polioencephalitis infectiva. (05 Mar 2000)