Perceptual correlates of neural representations evoked by odorant enantiomers

被引:152
作者
Linster, C
Johnson, BA
Yue, E
Morse, A
Xu, Z
Hingco, EE
Choi, YJ
Choi, M
Messiha, A
Leon, M
机构
[1] Cornell Univ, Dept Neurobiol & Behav, Ithaca, NY 14853 USA
[2] Univ Calif Irvine, Dept Neurobiol & Behav, Irvine, CA 92697 USA
关键词
olfactory coding; enantiomers; optical isomers; olfactory perception; neural representations; habituation; reinforcement learning; olfactory bulb; glomeruli;
D O I
10.1523/JNEUROSCI.21-24-09837.2001
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Spatial activation patterns within the olfactory bulb are believed to contribute to the neural representation of odorants. In this study, we attempted to predict the perceptions of odorants from their evoked patterns of neural activity in the olfactory bulb. We first describe the glomerular activation patterns evoked by pairs of odorant enantiomers based on the uptake of [C-14]2-deoxyglucose in the olfactory bulb glomerular layer. Using a standardized data matrix enabling the systematic comparison of these spatial odorant representations, we hypothesized that the degree of similarity among these representations would predict their perceptual similarity. The two enantiomers of carvone evoked overlapping but significantly distinct regions of glomerular activity; however, the activity patterns evoked by the enantiomers of limonene and of terpinen-4-ol were not statistically different from one another. Commensurate with these data, rats spontaneously discriminated between the enantiomers of carvone, but not between the enantiomers of limonene or terpinen-4-ol, in an olfactory habituation task designed to probe differences in olfactory perception.
引用
收藏
页码:9837 / 9843
页数:7
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