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- W2912239024 abstract "AIM. Vagus nerve stimulation (VNS) modulates hippocampal dentate gyrus (DG) electrophysiology and induces hypothermia in freely moving rats. This study evaluated whether hippocampal (CA1) electrophysiology is similarly modulated and to what extent this is associated with VNS-induced hypothermia. METHODS. Six freely moving rats received a first 4[Formula: see text]h session of rapid cycling VNS (7[Formula: see text]s on/18[Formula: see text]s off), while CA1 evoked potentials, EEG and core temperature were recorded. In a second 4[Formula: see text]h session, external heating was applied during the 3rd and 4th[Formula: see text]h of VNS counteracting VNS-induced hypothermia. RESULTS. VNS decreased the slope of the field excitatory postsynaptic potential (fEPSP), increased the population spike (PS) amplitude and latency, decreased theta (4–12[Formula: see text]Hz) and gamma (30–100[Formula: see text]Hz) band power and theta peak frequency. Normalizing body temperature during VNS through external heating abolished the effects completely for fEPSP slope, PS latency and gamma band power, partially for theta band power and theta peak frequency and inverted the effect on PS amplitude. CONCLUSIONS. Rapid cycle VNS modulates CA1 electrophysiology similarly to DG, suggesting a wide-spread VNS-induced effect on hippocampal electrophysiology. Normalizing core temperature elucidated that VNS-induced hypothermia directly influences several electrophysiological parameters but also masks a VNS-induced reduction in neuronal excitability." @default.
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- W2912239024 date "2019-10-28" @default.
- W2912239024 modified "2023-09-23" @default.
- W2912239024 title "Hypothermia Masks Most of the Effects of Rapid Cycling VNS on Rat Hippocampal Electrophysiology" @default.
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- W2912239024 doi "https://doi.org/10.1142/s0129065719500084" @default.
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