Figure 4.

Theta/gamma changes only occur across sequential blocks of trials where learning occurs. Histograms show examples of % change in theta amplitude, the theta/gamma ratio and theta/gamma coherence across sequential blocks of trials (either 3 or 4 blocks of 20-40 trials) for novel face-pair discriminations where two sheep either do (SA1 and SB1) or don't (SA2 and SB2) achieve a > 80% learning criterion. Blocks of trials where the > 80% criterion was achieved are shown as black bars. It can be seen that there is generally a very good correspondence between increases in these three parameters and performance above the learning criterion being achieved and maintained. There is no suggestion of changes occurring simply as a function of repeating blocks of trials over a particular time course and independent of discrimination performance

Kendrick et al. BMC Neuroscience 2011 12:55   doi:10.1186/1471-2202-12-55
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