Video 1. A simulation of the biofeedback as shown to the subjects.

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Video illustrates biofeedback environment as presented to the subjects during the target task, showing feedback on the motor unit (MU) spiking activity and the resulting cursor movement in the target space. Simulated data stream based on real data of a TII-instructed trial recorded from one exemplary subject. MU1 is shifted by +250 ms every iteration. Simulated data stream loads buffers of new incoming data every 125 ms as during the experiment. The lower-left window shows the incoming discharge behaviour of the selected MUs MU1 and MU2. The right window shows the targets and cursor movement according to the incoming data stream.