Low-frequency theta oscillations in the human hippocampus during real-world and virtual navigation

Véronique D. Bohbot (), Milagros S. Copara, Jean Gotman and Arne D. Ekstrom ()
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Véronique D. Bohbot: Douglas Institute, McGill University
Milagros S. Copara: Neuroscience Graduate Group, University of California
Jean Gotman: Montreal Neurological Institute, McGill University
Arne D. Ekstrom: Neuroscience Graduate Group, University of California

Nature Communications, 2017, vol. 8, issue 1, 1-7

Abstract: Abstract Low-Frequency Oscillations (LFO) in the range of 7–9 Hz, or theta rhythm, has been recorded in rodents ambulating in the real world. However, intra-hippocampus EEG recordings during virtual navigation in humans have consistently reported LFO that appear to predominate around 3–4 Hz. Here we report clear evidence of 7–9 Hz rhythmicity in raw intra-hippocampus EEG traces during real as well as virtual movement. Oscillations typically occur at a lower frequency in virtual than real world navigation. This study highlights the possibility that human and rodent hippocampal EEG activity are not as different as previously reported and this difference may arise, in part, due to the lack of actual movement in previous human navigation studies, which were virtual.

Date: 2017
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DOI: 10.1038/ncomms14415

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