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Fig. 2 | Journal of NeuroEngineering and Rehabilitation

Fig. 2

From: Wrist speed feedback improves elbow compensation and reaching accuracy for myoelectric transradial prosthesis users in hybrid virtual reaching task

Fig. 2

After one separate familiarization session, subjects completed the experimental protocol twiceā€”once with and once without audio feedback. The order of the feedback and no feedback sessions was randomized across subjects. a The structured protocol for familiarization involved a total of 32 reaches: four sets of 4 reaches towards each target, and 16 reaches towards targets in balanced random order. b The steady-state block involved a total of 100 reaches: four sets of 15 reaches towards each target, and 40 reaches towards targets in balanced random order. The order of same- or different-target groupings was randomized across subjects and consistent between subject visits. c The Perturbation block started with 12 reaches towards targets in random order. After these baseline trials, subjects did cycles of 8ā€“10 reaches towards targets in random order, followed by either 8 reaches towards the same target, or 8 reaches towards targets in balanced random order. The order of these cycles was randomized across subjects and consistent between subject visits. Reaches towards different targets with a dashed border indicate that balanced randomization was not enforced, and the number of reaches towards targets could differ from one another. Figure adapted from Earley et al. [28]

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