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Fig. 3 | Bioelectronic Medicine

Fig. 3

From: Extracting wavelet based neural features from human intracortical recordings for neuroprosthetics applications

Fig. 3

a Average impedance over time. Each data point here shows the average impedance across two different reference electrodes on the MEA. Most of the sharp decline happened within the first 400 days. In (b, c and d), the results were summarized from the data collected in Task 2. b Signal-to-Noise Ratio (SNR) over time. Each data point shown here is the average SNR value of an experimental day. The SNR was stable in general with an average value at 18.28 ± 0.25 dB throughout the length of the study, with a slight decline overall. c Peak-peak value of the detected TCs from the raw signal. Each data point presents the average peak-peak value of all the detected TCs from an experimental day. The Peak-peak value decreased the most during the first 400 days and the overall average throughout the study was 153.68 ± 17.92 μV. d RMS noise value of the raw signal. RMS value shared a similar temporal profile over the period of entire study compared to that of peak-peak value and SNR value. The overall average RMS noise was 18.78 ± 1.89 μV. In each figure, the line indicated the Loess regression result of the discrete values throughout the entire study, with 95% confidence intervals in each plot

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