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Mentions: Correlation analysis revealed qualitative information about the effect of PTZ on field recordings: The scaled autocorrelation (scale segment of 1s) on the field signal exhibited oscillatory components around 0.4 Hz in all conditions, but mutant fish exhibited frequency variability with time after PTZ application and variability across animals, leading to a low average oscillation power. In controls the frequency was robustly locked at 0.4 Hz. Autocorrelation histograms computed on the extracted events evidenced a wide refractory period (~ 4 s, see Figure 1A), followed by baseline in mutant fish recordings, whereas control animals exhibited a narrow refractory period (~ 2 s, see Figure 1B), followed by a secondary peak and a slow modulation (~ 35 s). Scaled autocorrelation histograms (scale segment of 1000s) showed constant correlation decrease with increased lag in the control fish, but not in mutant fish, where correlation for larger lags fluctuated around zero (see Figure 1C and 1D).
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