The cognitive role of cross-frequency coupling
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1
University Of California at Berkeley, United States
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2
Standford University, United States
Ongoing neuronal oscillations play an important role in perception, attention, and memory. Emerging evidence suggests that these rhythms do not exist in isolation, but rather interact across different spatial, temporal, and spectral scales giving rise to a variety of cross-frequency coupling dynamics including phase/amplitude, phase/phase, and amplitude/amplitude coupling. Such coupling is intriguing given current hypotheses about the functional roles of different brain rhythms. Low frequency oscillations coordinate long-range communication between different brain regions whereas high frequency gamma activity is more spatially restricted and reflects local cortical processing correlated with both local neuronal spiking activity and the fMRI BOLD signal. Cross-frequency coupling may reflect the means through which multiple overlapping long-range networks can communicate. Phase/amplitude coupling may be statistically biasing the extracellular membrane potential in local cortical regions such that neurons will be more likely to fire during particular phases or phase network ensembles of low frequency oscillations. In conjunction, phase/phase coupling may be coordinating spectrally-distributed processes. In this symposium, we will discuss a variety of cross-frequency coupling methods as applied to a variety of cognitive tasks in both humans and animals. The coupling dynamics we will discuss may reflect a selection mechanism that would support the complex behaviors of interest—including top-down attentional modulation, working memory, visual processing, and learning—in a physiologically plausible manner.
Keywords:
Cross-frequency coupling,
fMRI
Conference:
XI International Conference on Cognitive Neuroscience (ICON XI), Palma, Mallorca, Spain, 25 Sep - 29 Sep, 2011.
Presentation Type:
Introduction
Topic:
Symposium 18: The cognitive role of cross-frequency coupling
Citation:
Voytek
B and
Parvizi
J
(2011). The cognitive role of cross-frequency coupling.
Conference Abstract:
XI International Conference on Cognitive Neuroscience (ICON XI).
doi: 10.3389/conf.fnhum.2011.207.00571
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Received:
14 Nov 2011;
Published Online:
28 Nov 2011.
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Correspondence:
Dr. Bradley Voytek, University Of California at Berkeley, Berkeley, United States, bradley.voytek@gmail.com