Fig. 1.

Distribution of oscillation frequencies for all autocorrelation functions exhibiting a significant modulation. A17 (614 autocorrelation functions from 124 RSs), A18 (377 from 56 RSs), LGN (4084 from 485 RSs), and retina (841 from 120 RSs). Notice that oscillation frequencies cover a large range for all structures. Cortical oscillations tend to have a bimodal distribution, with two distinct clusters at 20–60 and 80–120 Hz, whereas thalamic and retinal oscillatory responses cover mostly the high-frequency range: from 60 to 120 Hz.