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Gait and Parkinson's disease: a conceptual model for an augmented-reality based therapeutic device. This chapter presents an augmented-reality based therapeutic device designed to overcome gait problems associated with Parkinson's Disease (PD). A normal model of gait is proposed followed by a model of Parkinsonian gait with the goal of construction of a gait enabling therapeutic device. The fundamental underlying tenet of the model is that vision pathology is responsible for the majority of Parkinsonian gait pathology. The basis for such a claim is the well documented phenomenon known as Kinesia Paradoxa, whereby in the presence of certain so-called visual cues a PD subject can be transformed from a totally immobile, helpless victim of this disease into a near normal walking individual. Several gait-enabling devices are also described. Stud Health Technol Inform 1998;58:200-8 Riess TJ PMID: 10350920, UI: 99183550 http://www.ncbi.nlm.nih.gov/ janet paterson 52 now / 41 dx / 37 onset Postal: PO Box 171, Almonte, Ontario, K0A 1A0, Canada WebUrl: <http://www.geocities.com/SoHo/Village/6263/> E-mail: [log in to unmask]