Figure 3: Robustness to unexpected loss of the most important electrodes.
From: Making brain–machine interfaces robust to future neural variability
Closed-loop BMI performance using the MRNN (red) and FIT Sameday (blue) decoders while simulating an unexpected loss of up to 10 electrodes by setting the firing rates of these electrodes to zero. The mean and s.e.m. across experimental sessions’ targets per minute performance is shown for each decoder as a function of how many electrodes were removed. Stars denote conditions for which the MRNN significantly outperformed FIT Sameday across sessions (P<0.05, paired t-test). The text above each condition’s horizontal axis tick specifies for how many of the individual evaluation days MRNN (red fraction) or FIT Sameday (blue fraction) performed significantly better than the other decoder according to single-session metrics of success rate and time to target. Electrode-dropping order was determined by the mutual information between that electrode’s spike count and target direction during arm-controlled reaches.
