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Sinusoids regressed to accelerometer measurements of the 4 motion profiles for the 0.45-Hz paradigms: head center (bold line), swing-only y-axis nulling (solid line), z-axis nulling (dotted line), and z-axis doubling (dahsed line). Results were similar for the 0.8-Hz paradigm. The actual measurements also showed vibrational components at higher frequencies (mostly at 5 and 15 Hz).
