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Select links below to play a video file of an animation of stride data collected from a normal subject and a patient with Parkinson's Disease.

We have developed a lightweight (< 50 g) ankle-mounted device for ambulatory monitoring of gait in Parkinson's disease. The gait monitor accurately measures stride length and can discern subtle changes in stride in response to levodopa administration. In addition, the frequency characteristics of vertical leg motion are used to detect episodes of freezing of gait - this is the first device to do so. We are currently working with the NIH to commercialize this device in collaboration with IM Systems, a Baltimore-based manufacturer of medical monitoring systems.

Select link below to download the stride monitor methods paper.

Moore ST, MacDougall HG, Gracies JM, Cohen HS, Ondo WG. Long-term monitoring of gait in Parkinson's disease (2007) Gait Posture 26: 200-207.