期刊
PROGRESS IN NEUROBIOLOGY
卷 100, 期 -, 页码 1-14出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.pneurobio.2012.09.002
关键词
Brain rhythms; Neuronal oscillations; Local field potential; Phase-amplitude coupling; Cross-frequency coupling
资金
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
- Fundacao de Apoio a Pesquisa do Estado do Rio Grande do Norte (FAPERN)
- Deutsche Forschungsgemeinschaft [SFB 636/B06]
- Bernstein Center for Computational Neurosciences
- National Science Foundation
We review recent evidence for a novel type of fast cortical oscillatory activity that occurs circumscribed between 110 and 160 Hz, which we refer to as high-frequency oscillations (HFOs). HFOs characteristically occur modulated by theta phase in the hippocampus and neocortex. HFOs can co-occur with gamma oscillations nested in the same theta cycle, in which case they typically peak at different theta phases. Despite the overlapping frequency ranges, HFOs differ from hippocampal ripple oscillations in some key characteristics, including amplitude, region of occurrence, associated behavioral state, and activity time-course (sustained vs intermittent). Recent in vitro evidence suggests that HFOs depend on fast GABAergic transmission and may also depend on axonal gap junctions. The functional role of HFOs is currently unclear. Both hippocampal and neocortical theta-HFO coupling increase during REM sleep, suggesting a role for HFOs in memory processing. (C) 2012 Elsevier Ltd. All rights reserved.
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