Document Detail

Slow oscillations in the mouse hippocampus entrained by nasal respiration.
MedLine Citation:
PMID:  24760854     Owner:  NLM     Status:  MEDLINE    
Different types of network oscillations occur in different behavioral, cognitive, or vigilance states. The rodent hippocampus expresses prominent θ oscillations at frequencies between 4 and 12 Hz, which are superimposed by phase-coupled γ oscillations (30-100 Hz). These patterns entrain multineuronal activity over large distances and have been implicated in sensory information processing and memory formation. Here we report a new type of oscillation at near-θ frequencies (2-4 Hz) in the hippocampus of urethane-anesthetized mice. The rhythm is highly coherent with nasal respiration and with rhythmic field potentials in the olfactory bulb: hence, we called it hippocampal respiration-induced oscillations. Despite the similarity in frequency range, several features distinguish this pattern from locally generated θ oscillations: hippocampal respiration-induced oscillations have a unique laminar amplitude profile, are resistant to atropine, couple differently to γ oscillations, and are abolished when nasal airflow is bypassed by tracheotomy. Hippocampal neurons are entrained by both the respiration-induced rhythm and concurrent θ oscillations, suggesting a direct interaction between endogenous activity in the hippocampus and nasal respiratory inputs. Our results demonstrate that nasal respiration strongly modulates hippocampal network activity in mice, providing a long-range synchronizing signal between olfactory and hippocampal networks.
Yevgenij Yanovsky; Mareva Ciatipis; Andreas Draguhn; Adriano B L Tort; Jurij Brankačk
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of neuroscience : the official journal of the Society for Neuroscience     Volume:  34     ISSN:  1529-2401     ISO Abbreviation:  J. Neurosci.     Publication Date:  2014 Apr 
Date Detail:
Created Date:  2014-04-24     Completed Date:  2014-06-09     Revised Date:  2014-08-26    
Medline Journal Info:
Nlm Unique ID:  8102140     Medline TA:  J Neurosci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  5949-64     Citation Subset:  IM    
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MeSH Terms
Brain Waves / physiology*
Hippocampus / physiology*
Mice, Inbred C57BL
Neurons / physiology*
Comment In:
J Neurosci. 2014 Jul 16;34(29):9473-5   [PMID:  25031390 ]

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