Reformulation in the phase plane enhances smoothness rater accuracy in stroke.

摘要: To improve the characterization of motor impairment, we compared sensitivities a phase plane metric with temporal domain measures derived from integrated squared jerk (ISJ). Five subjects stroke and cohort 21 neurologically intact volunteers performed self-paced, isolated elbow flexions. Analysis angular trajectories group revealed that metrics failed to detect performance deficit at p < .05 level, while did resolve (p .01). When applied subset movements arrest periods, measure also uniquely identified impairment (Wilcoxon rank-sum test, .001). Finally, when tested on data-driven model, measure, but not metrics, increased monotonically severity trajectory distortions. We conclude motion smoothness can be accurately measured in plane.