Postencephalitic parkinsonism

Postencephalitic parkinsonism is a secondary form of parkinsonism that develops as a delayed neurodegenerative sequela following a viral central nervous system infection, historically most prominent among survivors of encephalitis lethargica Clinically, affected individuals exhibit classic features such as bradykinesia, muscular rigidity, postural instability, and tremors, frequently accompanied by distinctive manifestations like oculogyric crises, cranial neuropathies, and behavioral disturbanc...

Postencephalitic parkinsonism is a secondary form of parkinsonism that develops as a delayed neurodegenerative sequela following a viral central nervous system infection, historically most prominent among survivors of encephalitis lethargica

The condition primarily impacts the extrapyramidal motor system through the progressive loss of dopaminergic neurons within the substantia nigra and midbrain networks Clinically, affected individuals exhibit classic features such as bradykinesia, muscular rigidity, postural instability, and tremors, frequently accompanied by distinctive manifestations like oculogyric crises, cranial neuropathies, and behavioral disturbances Pathophysiologically, it is characterized by neurofibrillary tangles and...

The condition primarily impacts the extrapyramidal motor system through the progressive loss of dopaminergic neurons within the substantia nigra and midbrain networks Pathophysiologically, it is characterized by neurofibrillary tangles and tau pathology in the basal ganglia and brainstem in the absence of the Lewy bodies and alpha-synuclein aggregates typically observed in idiopathic Parkinson disease

Clinically, affected individuals exhibit classic features such as bradykinesia, muscular rigidity, postural instability, and tremors, frequently accompanied by distinctive manifestations like oculogyric crises, cranial neuropathies, and behavioral disturbances

Pathophysiologically, it is characterized by neurofibrillary tangles and tau pathology in the basal ganglia and brainstem in the absence of the Lewy bodies and alpha-synuclein aggregates typically observed in idiopathic Parkinson disease