A noseful of objects

@article{Margot2009ANO,
  title={A noseful of objects},
  author={Christian Margot},
  journal={Nature Neuroscience},
  year={2009},
  volume={12},
  pages={813-814}
}
  • C. Margot
  • Published 1 July 2009
  • Biology, Psychology
  • Nature Neuroscience
How are volatile molecules entering the nose converted to odor percepts in the brain? A fMRI study finds that distributed patterns of activity in the human posterior piriform cortex code the perceived category of odorants. This categorization of odors into objects is independent of their chemical structure. 

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References

SHOWING 1-10 OF 15 REFERENCES

Olfactory perceptual stability and discrimination

TLDR
It is found that ensembles of rat olfactory bulb neurons decorrelate complex mixtures that vary by as little as a single missing component, whereas olfatory (piriform) cortical neural ensemble perform pattern completion in response to an absent component, essentially filling in the missing information and allowing perceptual stability.

Odor quality coding and categorization in human posterior piriform cortex

TLDR
It is 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.

Separate encoding of identity and similarity of complex familiar odors in piriform cortex

TLDR
The results suggest aPCX and pPCX play different roles in the processing of familiar odors and are consistent with an experience-dependent encoding (perceptual learning) of synthetic odorant identity in a PCX and an experience of odor similarity or odor quality in p PCX.

Odour Perception: An Object-Recognition Approach

TLDR
It is argued here that this occurs by rapid central adaptation to background odours combined with a pattern-matching system to recognise discrete sets of spatial and temporal olfactory features—an odour object.

Maps of odorant molecular features in the Mammalian olfactory bulb.

TLDR
This review summarizes the emerging view of the spatial organization of the odorant receptor maps and suggests that the glomerular sheet represents the characteristic molecular features in a systematic, gradual, and multidimensional fashion.

Innate versus learned odour processing in the mouse olfactory bulb

TLDR
It is shown that, in dorsal-zone-depleted mice, the dorsal domain of the olfactory bulb was devoid of glomerular structures, although second-order neurons were present in the vacant areas, which indicates that aversive information is received in the ofactory bulb by separate sets ofglomeruli, those dedicated for innate and those for learned responses.

Parallel-distributed processing in olfactory cortex: new insights from morphological and physiological analysis of neuronal circuitry.

TLDR
To increase the accessibility of findings for PC and to advertise its substantial potential as a model for experimental and modeling analysis of associative processes, parallels are described between PC and the hippocampal formation, inferotemporal visual cortex and prefrontal cortex.

Aversive Learning Enhances Perceptual and Cortical Discrimination of Indiscriminable Odor Cues

TLDR
These findings indicate that aversive learning induces piriform plasticity with corresponding gains in odor enantiomer discrimination, underscoring the capacity of fear conditioning to update perceptual representation of predictive cues, over and above its well-recognized role in the acquisition of conditioned responses.