Fig. 7.

Neuronal EPSP (input) and action potential generation (output) profiles match theta/delta cross-frequency coupling profile differences for “related” versus “unrelated” semantic interpretations. Decision-dependent differences in magnetoencephalography (MEG) theta-delta cross-frequency coupling (A) were not significantly different from the mean excitatory postsynaptic potential (EPSP) profiles (B) and action potential (C) profiles pooled from all three neuron subtypes (P > 0.05, Kologmorov-Smirnov, MEG “related” versus model lower cholinergic excitation (black), and MEG “unrelated” versus model higher cholinergic excitation (red). Lower graphs show polar plots for values in the upper-quartile range of the distribution. Note the presence of an additional peak later in the delta period when comparing the two outcomes and model conditions.