Pre-stimulus phase and amplitude regulation of phase-locked responses are maximized in the critical state.

ABSTRACT: Understanding why identical stimuli give differing neuronal responses and percepts is a central challenge in research on attention and consciousness. Ongoing oscillations reflect functional states that bias processing of incoming signals through amplitude and phase. It is not known, however, whether the effect of phase or amplitude on stimulus processing depends on the long-term global dynamics of the networks generating the oscillations. Here, we show, using a computational model, that the ability of networks to regulate stimulus response based on pre-stimulus activity requires near-critical dynamics-a dynamical state that emerges from networks with balanced excitation and inhibition, and that is characterized by scale-free fluctuations. We also find that networks exhibiting critical osci

SUBMITTER: Avramiea AE 

PROVIDER: S-EPMC7217696 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature