Abstract
Thalamo-cortical cross-frequency coupling detected with MEG.
Highlights
The instantaneous phase of thalamic alpha band activity (8–13 Hz) and the instantaneous amplitude of cortical gamma activity (30–70) were used to test for phase-amplitude coupling by computing the modulation index (Tort et al, 2008)
This revealed a significant thalamo-cortical cross-frequency coupling with the posterior medial parietal cortex (PMPC), one of the hubs in the default mode network
The prima facie plausibility of cross-frequency coupling between subcortical structures and the cortex on the other hand, is demonstrated by studies reporting thalamo-cortical phaseamplitude coupling using data collected invasively from the thalamus (Fitzgerald et al, 2013) and subthalamic nucleus
Summary
The phase of thalamic alpha activity modulates cortical gamma-band activity: evidence from resting-state MEG recordings by Roux, F., Wibral, M., Singer, W., Aru, J., and Uhlhaas, P.J. Cross-frequency interactions have become the focus of a large literature exploring different types of coupling across a multitude of brain regions and states (Jirsa and Müller, 2013). Most work to date has, focused on local cross-frequency interactions, leaving coupling between brain regions relatively little explored.
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