Progress and Prospects in Parkinson's Research/Symptoms/Automatism

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Automatism
Forced obedience to external stimuli or commands.

Some potentially relevant references are:-

Allain et al (1995)  Explicit and procedural memory in Parkinson's disease.

Allain et al (1995)   Procedural memory and Parkinson's disease.

Perez-Velazquez  (2012)  The biophysical bases of will-less behaviours