Earlier Parkinson’s Onset and Dystonia Symptoms Seen in GCH1 Mutations in Study

Earlier disease onset and involuntary foot muscle contractions may be a consequence of mutations in the GCH1 gene in both Parkinson’s patients and those with dopa-responsive dystonia (DRD), a study reports. These mutations may also explain the lack of problems found with the autonomic nervous system — which controls organs not under…