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. Author manuscript; available in PMC: 2016 Jun 29.
Published in final edited form as: IEEE Int Conf Rehabil Robot. 2011;2011:5975514. doi: 10.1109/ICORR.2011.5975514

Fig. 5.

Fig. 5

Histograms of the handle acceleration in plane (group averaged, 50 point bins) show how training force fields (center and right) differ from baseline distributions (left). Negative viscosity training exhibits trends of increasing activity in the sagittal axis, while combined-load tends to decrease large accelerations overall (+/o signs indicate increase/decrease where 95% CI intervals exclude zero). These findings suggest that negative viscosity facilitates greater elbow flexion-extension activity during motor exploration training.