Fig. 5

Signal stability presented by the normalized signal strength. Within each time series, the data is normalized to its initial value. In Task 1, the normalized signals strength for mf-MWP, hf-MWP, MUA and TCs were stabilized after approximately 300 days of decline, while normalized signal strength for lf-MWP and LFP showed a better signal stability over time. MUA and mf-MWP signals shared a very similar profile in signal declining with most of their confidence interval ranges overlap with each other. In a longer study in Task 2, similar signal stability was observed overall, while TCs signal showed a more gradual decline after 800 days post-implantation. The band in each time series shows the range of its 95% confidence interval of a LOESS fit