Predicting odor perceptual similarity from odor structure

To understand the brain mechanisms of olfaction we must understand the rules that govern the link between odorant structure and odorant perception. Natural odors are in fact mixtures made of many molecules, and there is currently no method to look at the molecular structure of such odorant-mixtures...

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Bibliographic Details
Published in:PLoS computational biology 2013-09, Vol.9 (9), p.e1003184-e1003184
Main Authors: Snitz, Kobi, Yablonka, Adi, Weiss, Tali, Frumin, Idan, Khan, Rehan M, Sobel, Noam
Format: Article
Language:English
Subjects:
Algorithms
Brain - physiology
Chemosensory perception
Experiments
Humans
Neurosciences
Odorants
Odors
Perception
Physiological aspects
Psychological aspects
Psychophysiology
Science
Sensory Thresholds
Smell
Software
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Summary:To understand the brain mechanisms of olfaction we must understand the rules that govern the link between odorant structure and odorant perception. Natural odors are in fact mixtures made of many molecules, and there is currently no method to look at the molecular structure of such odorant-mixtures and predict their smell. In three separate experiments, we asked 139 subjects to rate the pairwise perceptual similarity of 64 odorant-mixtures ranging in size from 4 to 43 mono-molecular components. We then tested alternative models to link odorant-mixture structure to odorant-mixture perceptual similarity. Whereas a model that considered each mono-molecular component of a mixture separately provided a poor prediction of mixture similarity, a model that represented the mixture as a single structural vector provided consistent correlations between predicted and actual perceptual similarity (r≥0.49, p
ISSN:1553-7358
1553-734X
1553-7358
DOI:10.1371/journal.pcbi.1003184