Postencephalitic Parkinson Disease, also known as postencephalitic parkinsonism, is related to tremor and olivopontocerebellar atrophy. An important gene associated with Postencephalitic Parkinson Disease is MAPT (Microtubule Associated Protein Tau), and among its related pathways/superpathways are Neuroscience and Sudden infant death syndrome (SIDS) susceptibility pathways. Affiliated tissues include eye and brain, and related phenotypes are resting tremor and abnormal pyramidal sign