statistical analysis of coding for molecular properties in the olfactory bulb
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ID: 214858
2011
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Abstract
The relationship between molecular properties of odorants and neural activities is arguably one of the most important issues in olfaction and the rules governing this relationship are still not clear. In the olfactory bulb (OB), glomeruli relay olfactory information to second-order neurons which in turn project to cortical areas. We investigate relevance of odorant properties, spatial localization of glomerular coding sites, and size of coding zones in a dataset of 2-deoxyglucose images of glomeruli over the entire OB of the rat. We relate molecular properties to activation of glomeruli in the OB using a nonparametric statistical test and a support-vector machine classification study. Our method permits to systematically map the topographic representation of various classes of odorants in the OB. Our results suggest many localized coding sites for particular molecular properties and some molecular properties that could form the basis for a spatial map of olfactory information. We found that alkynes, alkanes, alkenes, and amines affect activation maps very strongly as compared to other properties and that amines, sulfur-containing compounds, and alkynes have small zones and high relevance to activation changes, while aromatics, alkanes, and carboxylics acid recruit very big zones in the dataset. Results suggest a local spatial encoding for molecular properties.
| Reference Key |
eauffarth2011frontiersstatistical
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|---|---|
| Authors | ;Benjamin eAuffarth;Benjamin eAuffarth;Agustin eGutierrez;Agustin eGutierrez;Santiago eMarco;Santiago eMarco |
| Journal | Vacuum |
| Year | 2011 |
| DOI |
10.3389/fnsys.2011.00062
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| URL | |
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