 Inclusion criteria: patients diagnosed with PD, with Hoehn and Yahr Stage between 1-3.5, who suffer from FOG, as measured at screening by the previously validated new FOG questionnaire NFOG-Q, whose medications have not changed within 1 month of the study and are not anticipated to change during the study, are able to walk independently, and who are between the ages of 40-80 inclusive. 