Figure 2.

Normalized CCH and peri stimulus time histograms (PSTH) for two pairs of recording sites connected to the dominant (A and B) and nondominant eye (C and D), respectively, under monocular (A and C) and dichoptic (B and D) stimulation conditions. (A) CCH and the corresponding PSTHs for a pair of recording sites connected to the dominant eye under monocular stimulation conditions. Insets above the correlation histograms indicate stimulation conditions. Cent and Sat, RMA (in %) of the center peak (Cent) and first satellite peak (Sat) in the CCHs; n.s., CCH modulation was not significant (see Materials and Methods). Vertical lines in the PSTHs indicate the response epoch between the second and third reversal of stimulus motion, for which the CCH was calculated (see Materials and Methods). Bottom, superimposed single trial EOG recordings of horizontal and vertical (lower traces) eye position obtained during the measurement window indicated in the PSTHs. (B) Responses from the same recording sites as in A under dichoptic stimulation conditions. Note that synchrony and oscillatory patterning are enhanced without significant alteration of discharge rates. (C and D) CCHs and PSTHs for a pair of recording sites connected to the nondominant eye under monocular (C) and dichoptic stimulation conditions (D). Note the decrease of synchronization and oscillatory modulation in D and the lack of changes in discharge rate. Note also that eye movements were absent under all stimulation conditions.