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Fig. 4 | Journal of NeuroEngineering and Rehabilitation

Fig. 4

From: Validity of shoe-type inertial measurement units for Parkinson’s disease patients during treadmill walking

Fig. 4

Data from a representative PD participant. The figure shows the resultant linear accelerations during treadmill walking with the shoe-type IMU system (DynaStab) and motion capture system (Vicon). The red line shows the motion capture system data; the blue line shows the IMU system data; the green line shows the root mean square error (RMSE) between the IMU and motion capture systems; the red circles show the timing of HS; and the blue circles show the timing of TO. a heel strike event. b toe off event

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