Scientific Understanding of Consciousness
Attentional Selection -- Entrainment of Neuronal Oscillations
Science 4 April 2008: Vol. 320. no. 5872, pp. 110 - 113
Entrainment of Neuronal Oscillations as a Mechanism of Attentional Selection
Peter Lakatos,1,2 George Karmos,2,3 Ashesh D. Mehta,4 Istvan Ulbert,2,3 Charles E. Schroeder1,5
1 Cognitive Neuroscience and Schizophrenia Program, Nathan Kline Institute, Orangeburg, NY 10962, USA.
Whereas gamma-band neuronal oscillations clearly appear integral to visual attention, the role of lower-frequency oscillations is still being debated. Mounting evidence indicates that a key functional property of these oscillations is the rhythmic shifting of excitability in local neuronal ensembles. Here, we show that when attended stimuli are in a rhythmic stream, delta-band oscillations in the primary visual cortex entrain to the rhythm of the stream, resulting in increased response gain for task-relevant events and decreased reaction times. Because of hierarchical cross-frequency coupling, delta phase also determines momentary power in higher-frequency activity. These instrumental functions of low-frequency oscillations support a conceptual framework that integrates numerous earlier findings.
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Return to — Attention
Return to — Oscillation, Synchronization
Further discussion -- Covington Theory of Consciousness