Abstract:
:Coherent oscillations in the theta-to-gamma frequency range have been proposed as a mechanism that coordinates neural activity in large-scale cortical networks in sensory, motor, and cognitive tasks. Whether this mechanism also involves coherent oscillations at delta frequencies (1-4 Hz) is not known. Rather, delta oscillations have been associated with slow-wave sleep. Here, we show coherent oscillations in the delta frequency band between parietal and frontal cortices during the decision-making component of a somatosensory discrimination task. Importantly, the magnitude of this delta-band coherence is modulated by the different decision alternatives. Furthermore, during control conditions not requiring decision making, delta-band coherences are typically much reduced. Our work indicates an important role for synchronous activity in the delta frequency band when large-scale, distant cortical networks coordinate their neural activity during decision making.
journal_name
Proc Natl Acad Sci U S Aauthors
Nácher V,Ledberg A,Deco G,Romo Rdoi
10.1073/pnas.1314681110subject
Has Abstractpub_date
2013-09-10 00:00:00pages
15085-90issue
37eissn
0027-8424issn
1091-6490pii
1314681110journal_volume
110pub_type
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journal_title:Proceedings of the National Academy of Sciences of the United States of America
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