ICD-11 definition : Parkinsonism is a clinical syndrome characterized by four cardinal features: rest
tremor, muscular rigidity, akinesia or bradykinesia, and postural disturbances which
include shuffling gait and flexed posture and loss of postural reflexes. Bradykinesia
and one other clinical feature is required to make a diagnosis of Parkinsonism. Parkinsonism
may result from a variety of conditions including progressive neurodegenerative disorders
such as Parkinson Disease or Atypical Parkinsonism where the progressive degeneration
of nigral and other neurons leads to dopamine deficiency. Parkinsonism may also be
a result of structural lesions such as strokes or tumors or blockage of dopamine receptors
in the striatum by drugs such as neuroleptics.;
Parkinsonism is a clinical syndrome characterized by four cardinal features: rest
tremor, muscular rigidity, akinesia or bradykinesia, and postural disturbances which
include shuffling gait and flexed posture and loss of postural reflexes. Bradykinesia
and one other clinical feature is required to make a diagnosis of Parkinsonism. Parkinsonism
may result from a variety of conditions including progressive neurodegenerative disorders
such as Parkinson Disease or Atypical Parkinsonism where the progressive degeneration
of nigral and other neurons leads to dopamine deficiency. Parkinsonism may also be
a result of structural lesions such as strokes or tumors or blockage of dopamine receptors
in the striatum by drugs such as neuroleptics.