Theta-associated high-frequency oscillations (110-160 Hz) in the hippocampus and neocortex

被引：86
作者：
Tort, Adriano B. L. [1 ]
Scheffer-Teixeira, Robson [1 ]
Souza, Bryan C. [1 ]
Draguhn, Andreas [2 ]
Brankack, Jurij [2 ]
机构：
[1] Univ Fed Rio Grande do Norte, Inst Brain, BR-59056450 Natal, RN, Brazil
[2] Heidelberg Univ, Inst Physiol & Pathophysiol, D-69120 Heidelberg, Germany
来源：
PROGRESS IN NEUROBIOLOGY | 2013年 / 100卷
基金：
美国国家科学基金会;
关键词：
Brain rhythms; Neuronal oscillations; Local field potential; Phase-amplitude coupling; Cross-frequency coupling; GAMMA OSCILLATIONS; BEHAVING RAT; NEURONAL OSCILLATIONS; NETWORK OSCILLATIONS; TEMPORAL STRUCTURES; CORTICAL NETWORKS; AUDITORY-CORTEX; NEURAL ACTIVITY; REM-SLEEP; IN-VITRO;
D O I：
10.1016/j.pneurobio.2012.09.002
中图分类号：
Q189 [神经科学];
学科分类号：
071006 ;
摘要：
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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收藏
页码：1 / 14
页数：14
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