Fig. 5.

The strength of theta–gamma coupling correlates with learning up to stimulus sampling. (A) Time-frequency decomposition of a representative fissure electrode during the choice period of the task. The time point 0 denotes the initiation of stimulus sampling, defined as the crossing of the rat's nose over the rim of the pot (see Materials and Methods). (B) Normalized MI during the choice period of the task. The normalization was done within each rat by dividing the MI value of each group by the average MI over groups. Data points represent the mean (± SEM) over rats. *, P < 0.05. (C) Linear correlation of the pooled data around the period of stimulus sampling and selection.