Figure 11.

Responses to stationary stimuli are not driven by monitor refresh. A, Autocorrelogram of the spike train for a single unit that preferred stationary stimuli (same cell as in Fig. 2 E, F). B, Power spectrum of the same spike train (Fourier transform of the autocorrelogram). If response was entrained to the refresh of the monitor, there should be a peak at 100 Hz. C, For each MT unit in our sample, SMRR is plotted as a function of the power ratio (P100/Pflanks), which is defined as the power in the spike train at 100 Hz (P100) divided by the average power in the frequency ranges of 50-80 and 120-150 Hz (Pflanks). If strong responses to stationary dots were driven by monitor flicker, there should be a positive correlation in this scatter plot.