Header

UZH-Logo

Maintenance Infos

Odor quality coding and categorization in human posterior piriform cortex


Howard, J D; Plailly, J; Grueschow, M; Haynes, J D; Gottfried, J A (2009). Odor quality coding and categorization in human posterior piriform cortex. Nature Neuroscience, 12(7):932-8.

Abstract

Efficient recognition of odorous objects universally shapes animal behavior and is crucial for survival. To distinguish kin from nonkin, mate from nonmate and food from nonfood, organisms must be able to create meaningful perceptual representations of odor qualities and categories. It is currently unknown where and in what form the brain encodes information about odor quality. By combining functional magnetic resonance imaging (fMRI) with multivariate (pattern-based) techniques, we found that spatially distributed ensemble activity in human posterior piriform cortex (PPC) coincides with perceptual ratings of odor quality, such that odorants with more (or less) similar fMRI patterns were perceived as more (or less) alike. We did not observe these effects in anterior piriform cortex, amygdala or orbitofrontal cortex, indicating that ensemble coding of odor categorical perception is regionally specific for PPC. These findings substantiate theoretical models emphasizing the importance of distributed piriform templates for the perceptual reconstruction of odor object quality.

Abstract

Efficient recognition of odorous objects universally shapes animal behavior and is crucial for survival. To distinguish kin from nonkin, mate from nonmate and food from nonfood, organisms must be able to create meaningful perceptual representations of odor qualities and categories. It is currently unknown where and in what form the brain encodes information about odor quality. By combining functional magnetic resonance imaging (fMRI) with multivariate (pattern-based) techniques, we found that spatially distributed ensemble activity in human posterior piriform cortex (PPC) coincides with perceptual ratings of odor quality, such that odorants with more (or less) similar fMRI patterns were perceived as more (or less) alike. We did not observe these effects in anterior piriform cortex, amygdala or orbitofrontal cortex, indicating that ensemble coding of odor categorical perception is regionally specific for PPC. These findings substantiate theoretical models emphasizing the importance of distributed piriform templates for the perceptual reconstruction of odor object quality.

Statistics

Citations

120 citations in Web of Science®
128 citations in Scopus®
Google Scholar™

Altmetrics

Downloads

38 downloads since deposited on 03 Nov 2011
19 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:03 Faculty of Economics > Department of Economics
08 University Research Priority Programs > Foundations of Human Social Behavior: Altruism and Egoism
Dewey Decimal Classification:170 Ethics
330 Economics
Language:English
Date:2009
Deposited On:03 Nov 2011 14:16
Last Modified:07 Dec 2017 09:26
Publisher:Nature Publishing Group
ISSN:1097-6256
Free access at:PubMed ID. An embargo period may apply.
Publisher DOI:https://doi.org/10.1038/nn.2324
PubMed ID:19483688

Download

Download PDF  'Odor quality coding and categorization in human posterior piriform cortex'.
Preview
Content: Accepted Version
Filetype: PDF
Size: 2MB
View at publisher