articleJournal of NeuroscienceJan 11, 2012BRONZE OA

Cross-Frequency Phase–Phase Coupling between Theta and Gamma Oscillations in the Hippocampus

Rutgers, The State University of New Jersey · Humboldt-Universität zu Berlin · +1 more institution

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Abstract

Neuronal oscillations allow for temporal segmentation of neuronal spikes. Interdependent oscillators can integrate multiple layers of information. We examined phase-phase coupling of theta and gamma oscillators in the CA1 region of rat hippocampus during maze exploration and rapid eye movement sleep. Hippocampal theta waves were asymmetric, and estimation of the spatial position of the animal was improved by identifying the waveform-based phase of spiking, compared to traditional methods used for phase estimation. Using the waveform-based theta phase, three distinct gamma bands were identified: slow gamma(S) (gamma(S); 30-50 Hz), midfrequency gamma(M) (gamma(M); 50-90 Hz), and fast gamma(F) (gamma(F); 90-150…

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