Abstract
Previous research demonstrated that while selectively attending to relevant aspects of the external world, the brain extracts pertinent information by aligning its neuronal oscillations to key time points of stimuli or their sampling by sensory organs. This alignment mechanism is termed oscillatory entrainment. We investigated the global, long-timescale dynamics of this mechanism in the primary auditory cortex of nonhuman primates, and hypothesized that lapses of entrainment would correspond to lapses of attention. By examining electrophysiological and behavioral measures, we observed that besides the lack of entrainment by external stimuli, attentional lapses were also characterized by high-amplitude alpha oscillations, with alpha frequency structuring of neuronal ensemble and single-unit operations. Entrainment and alpha-oscillation-dominated periods were strongly anticorrelated and fluctuated rhythmically at an ultra-slow rate. Our results indicate that these two distinct brain states represent externally versus internally oriented computational resources engaged by large-scale task-positive and task-negative functional networks.
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Acknowledgements
Support for this work was provided by NIH grant R01DC012947 from the NIDCD (P.L.) and R01MH109289 from the NIMH (D.C.J.).
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P.L. and M.N.O. designed the study. M.N.O., T.M. and D.R. performed the experiments. P.L. and D.C.J. designed the analyses. P.L., M.N.O., A.B. and S.A.N. performed the analyses. P.L. wrote the manuscript with input from all authors.
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Lakatos, P., Barczak, A., Neymotin, S. et al. Global dynamics of selective attention and its lapses in primary auditory cortex. Nat Neurosci 19, 1707â1717 (2016). https://doi.org/10.1038/nn.4386
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DOI: https://doi.org/10.1038/nn.4386
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