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Fig. 4 | Journal of NeuroEngineering and Rehabilitation

Fig. 4

From: Supplemental vibrotactile feedback control of stabilization and reaching actions of the arm using limb state and position error encodings

Fig. 4

Vibrotactile information encoding schemes: spectrograms and time-aligned time series waveforms. a Error feedback encoding scheme. Time series (bottom) and spectrogram (top) of vibrotactile feedback during an exemplar reach (left) and a portion of a stabilization trial (right). Frequency axes and time scale as in panel (c). For the time series, the scale bars in the bottom panel (left) represent 0.1 G (vertical axis) and 1 s (horizontal axis). b Optimal state encoding scheme (λ = 0.2). c Sham feedback encoding scheme. See text for details. Colorbar: signal power relative to total signal power, in units of dB

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