RASGRP3 and Parkinson disease: The main contribution of this study was to examine the implication of pathways with varying turn angles and task conditions on the gait of healthy young (Grp1), healthy elderly (Grp2 and Grp3) and individuals with PD (Grp4) by using a wearable system, namely SmartWalk that can quantify gait in terms of (gait-related indices using Instrumented Insoles and knee flexion using Knee Angle Recorder Unit).