Parkinson’s disease is a disorder of the brain and the ...

Muscular rigidity is simple to understand: the patient who has Parkinson’s disease has stiff and rigid muscle tone. However, unlike bradykinesia, postural instability, and tremor, muscle rigidity is not a sign that is visible. Muscular rigidity can only be detected by an examiner performing passive range of motion of the patient’s arms and ... ................
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