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Respiration Modulates Olfactory Memory Consolidation in Humans
Stockholm University, Faculty of Social Sciences, Department of Psychology, Perception and psychophysics. Karolinska Institutet, Sweden; Donders Institute for Brain, Cognition, and Behavior, The Netherlands; Radboud University, The Netherlands.
Number of Authors: 42018 (English)In: Journal of Neuroscience, ISSN 0270-6474, E-ISSN 1529-2401, Vol. 38, no 48, p. 10286-10294Article in journal (Refereed) Published
Abstract [en]

In mammals respiratory-locked hippocampal rhythms are implicated in the scaffolding and transfer of information between sensory and memory networks. These oscillations are entrained by nasal respiration and driven by the olfactory bulb. They then travel to the piriform cortex where they propagate further downstream to the hippocampus and modulate neural processes critical for memory formation. In humans, bypassing nasal airflow through mouth-breathing abolishes these rhythms and impacts encoding as well as recognition processes thereby reducing memory performance. It has been hypothesized that similar behavior should be observed for the consolidation process, the stage between encoding and recognition, were memory is reactivated and strengthened. However, direct evidence for such an effect is lacking in human and nonhuman animals. Here we tested this hypothesis by examining the effect of respiration on consolidation of episodic odor memory. In two separate sessions, female and male participants encoded odors followed by a 1 h awake resting consolidation phase where they either breathed solely through their nose or mouth. Immediately after the consolidation phase, memory for odors was tested. Recognition memory significantly increased during nasal respiration compared with mouth respiration during consolidation. These results provide the first evidence that respiration directly impacts consolidation of episodic events, and lends further support to the notion that core cognitive functions are modulated by the respiratory cycle.

Place, publisher, year, edition, pages
2018. Vol. 38, no 48, p. 10286-10294
Keywords [en]
consolidation, episodic, hippocampus, memory, odor, respiration
National Category
Neurosciences Psychology
Research subject
Psychology
Identifiers
URN: urn:nbn:se:su:diva-163613DOI: 10.1523/JNEUROSCI.3360-17.2018ISI: 000451430100006PubMedID: 30348674OAI: oai:DiVA.org:su-163613DiVA, id: diva2:1276738
Available from: 2019-01-08 Created: 2019-01-08 Last updated: 2019-01-17Bibliographically approved

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