Document Detail

Orthonasal and retronasal but not oral-cavity-only discrimination of vapor-phase fatty acids.
MedLine Citation:
PMID:  20100787     Owner:  NLM     Status:  MEDLINE    
Discrimination of vapor-phase linoleic, oleic, and stearic fatty acids was studied using triangle tests. For each trial, 2 of the 3 modified odorant delivery containers (MODCs) had the same content and 1 was different. Contents were either mineral oil-diluted linoleic or oleic acids, with mineral oil in the other MODC (blanks) or undiluted stearic acid with NaCl in the other MODC (blanks). The task was to indicate which of the 3 MODC had the most different odor. Vapor-phase fatty acids and blanks were presented orthonasally, retronasally, or oral-cavity-only. It was found that all 3 fatty acids were discriminated from the blanks both orthonasally and retronasally, P <or= 0.01, one-tailed binomial tests. Orthonasally, 87% of 30 participants discriminated linoleic acid from blanks and 83% discriminated oleic and stearic acids. Retronasally, 93% discriminated linoleic acid from blanks, 57% discriminated oleic acid; 83% discriminated stearic acid. In contrast, with oral-cavity-only presentations, none of the fatty acids were discriminated from blanks, P > 0.05 (30% of 30 participants discriminated linoleic acid from blanks, P = 0.71; 47%, oleic and stearic acids, P = 0.09). These results demonstrate that human participants can discriminate linoleic, oleic, and stearic fatty acids both orthonasally and retronasally, confirming that humans can smell fatty acids.
Bryson Bolton; Bruce P Halpern
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-01-25
Journal Detail:
Title:  Chemical senses     Volume:  35     ISSN:  1464-3553     ISO Abbreviation:  Chem. Senses     Publication Date:  2010 Mar 
Date Detail:
Created Date:  2010-02-05     Completed Date:  2010-04-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8217190     Medline TA:  Chem Senses     Country:  England    
Other Details:
Languages:  eng     Pagination:  229-38     Citation Subset:  IM    
Department of Psychology, Uris Hall, Cornell University, Ithaca, NY 14853-7601, USA.
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MeSH Terms
Linoleic Acid / pharmacology*
Middle Aged
Oleic Acid / pharmacology*
Smell / physiology*
Stearic Acids / pharmacology*
Taste / physiology
Reg. No./Substance:
0/Stearic Acids; 112-80-1/Oleic Acid; 2197-37-7/Linoleic Acid; 57-11-4/stearic acid

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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