title: Coherent delta-band oscillations between cortical areas correlate with decision making.
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.
authors: Instituto de Fisiología Celular-Neurociencias, Universidad Nacional Autónoma de México, 04510 Mexico D.F., Mexico.
authors: Verónica
authors: V
authors: Nácher
authors: Anders
authors: A
authors: Ledberg
authors: Gustavo
authors: G
authors: Deco
authors: Ranulfo
authors: R
authors: Romo
mesh_terms: D000200:Action Potentials; D000818:Animals; D001522:Behavior, Animal / Q000502:physiology; D002540:Cerebral Cortex / Q000033:anatomy & histology / Q000502:physiology*; D003657:Decision Making / Q000502:physiology*; D003700:Delta Rhythm / Q000502:physiology*; D004192:Discrimination, Psychological / Q000502:physiology; D005625:Frontal Lobe / Q000033:anatomy & histology / Q000502:physiology; D008253:Macaca mulatta / Q000033:anatomy & histology / Q000502:physiology* / Q000523:psychology; D008297:Male; D023421:Models, Animal; D008959:Models, Neurological; D010296:Parietal Lobe / Q000033:anatomy & histology / Q000502:physiology
keywords: brain circuits; low-frequency rhythm; synchrony
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