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

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Erethism

Pathological irritability or sensitivity of an organ or a body part.

This symptom (also known as Mad Hatter's Disease is commonly associated with mercury toxicity, (prevalent in hat manufacture) which is itself a noted causal risk for PD.

The following references are relevant:-

Critchley (1981) '' Speech disorders of Parkinsonism: a review. ''

Clarkson et al (2003) Human Exposure to Mercury: the Three Modern Dilemmas 

Liu et al (2012)  Occupational Neurotoxic Diseasesin Taiwan

Further Research

References