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Patrick Ippersiel, Richard Preuss and Shawn M. Robbins

determining CRP is based on a Hilbert transform. 2 However, the Hilbert transform results in end effects (ie, data distortion), similar to the difficulties encountered during digital filtering. 3 Such distortions would preclude interpretation of CRP waveforms at the start and end of the movement. Previous

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Michael Buchecker, Stefan Wegenkittl, Thomas Stöggl and Erich Müller

-start and await-end effects, the first and last 5 s of each record were omitted in subsequent analyses. In line with Ruhe, Fejer, and Walker ( 2010 ), the unavoidable measurement noise contaminating the relevant COP ML and COP AP coordinates was eliminated through a low-pass filter (Butterworth filter