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Shows the normalized NAP at the beginning of the experiment along with the R value associated with the Spearman rank correlation analysis when applied to each time point in the NAP waveform. The lower set of figures shows on the NAP waveform the latencies at which the R value associated with the Spearman rank correlation analysis between the amplitude at that time and Aβ42 concentration is significant with p < 0.01. Low and high stimulation currents at 4 ms interstimulus interval.
