
122| Parkinson’s Disease – A Conversation With Dr. Sara Schaefer
Navigating Neuropsychology
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The Role of Rigidity in Parkinson's Disease
There are actually three types of increased tone. There's rigidity, spasticity and paratonia. Paratonia is when a patient just sort of fights you no matter what you do with their arm or leg. Spasticity is a pyramidal sign, meaning the pyramidal tracks, the cortical spinal tracks that go down through the pyramids in the brain are affected. Rigidity is extra pyramidal. And that is what we see in Parkinson's disease and Parkinsonism.
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