Fig. 4From: Literature review of stroke assessment for upper-extremity physical function via EEG, EMG, kinematic, and kinetic measurements and their reliabilityDifference between path-length ratio and mean absolute value of the distance. A Path-length ratio. \(d_{ref}\) is the theoretical distance the hand should travel between the start and end point. \(d_{total}\) is the total distance the hand travelled from Start to End. B Mean absolute value of the distance. \(d_{i}\) is the distance between the theoretical path and the actual hand pathBack to article page