Format

Send to

Choose Destination
See comment in PubMed Commons below
Neurosci Lett. 2009 Apr 24;454(2):124-8. doi: 10.1016/j.neulet.2009.03.002. Epub 2009 Mar 5.

Influence of simultaneous gustatory stimuli on orthonasal and retronasal olfaction.

Author information

1
Department of Otorhinolaryngology, University Hospital of Basel, Petersgraben 4, 4031 Basel, Switzerland. awelge@uhbs.ch

Abstract

Orthonasal and retronasal olfaction processes differ. The aim of this study was to examine whether congruent and incongruent simultaneous gustatory stimuli influence orthonasal and retronasal odorant perception, using olfactory event-related potentials as a measure. Thirty-two young, healthy subjects (16 men, 16 women) took part in two test sessions. Olfactory event-related potentials were recorded in response to a food-like odor, vanillin, and to an odor usually not associated with foods, the rose-like phenylethylalcohol. Each session consisted of four randomized blocks of 15 stimuli each which were applied either orthonasally or retronasally. Simultaneously, sweet or sour gustatory stimuli were applied. In response to retronasal vanillin, stimuli latencies P2 of the event-related potentials were significantly shorter in the congruent "sweet condition" than the incongruent "sour condition". In contrast, with orthonasal stimulation, shorter P2 latencies were seen for both odorants in the incongruent condition. Intensity of both odorants was perceived as less pronounced after retronasal stimulation than after orthonasal stimulation. In conclusion, application of a sweet taste significantly enhanced the processing of a congruent olfactory stimulus when presented through the retronasal route. Incongruent simultaneous gustatory stimulation applied during orthonasal olfaction seemed to induce conflict priming, also resulting in faster processing.

PMID:
19429068
DOI:
10.1016/j.neulet.2009.03.002
[Indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Support Center