Figure 4
From: State space methods for phase amplitude coupling analysis

Rats show increased theta-gamma coupling when learning a discrimination task in hypocampus CA3 region. Top row: Standard4 processing for phase-amplitude modulogram (left), multitaper spectrogram38 (middle), and standard modulation index (right). Bottom row: dSSP applied on 2 s windows (left), parametric spectrogram (middle), modulation index based on dSSP (right).