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Keverne, E.B. |
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Olfactory learning |
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1995 |
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Current Opinion in Neurobiology |
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Curr. Opin. Neurobiol. |
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5 |
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4 |
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482-488 |
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olfactory perception mammals |
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Unravelling the mechanisms of learning and memory can, and should, be tackled at many levels. Discovery of the huge family of odourant receptor genes provided olfaction with `molecular' respectability similar to that afforded to the visual system. Consequently, molecular studies have dominated the olfactory literature this past year, even to the point of providing a molecular basis of olfactory perception. Needless to say, the molecular approach favours a `hard-wired' system; however, other results suggest that flexibility in the olfactory system provides for certain adaptations that are crucial to the biological needs of mammals. |
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798 |
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Author |
Wilson, D.A.; Stevenson, R.J. |
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Title |
The fundamental role of memory in olfactory perception |
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Journal Article |
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Year |
2003 |
Publication |
Trends in Neurosciences |
Abbreviated Journal |
Trends. Neurosci. |
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26 |
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5 |
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243-247 |
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Keywords |
olfactory perception mammals |
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Current emphasis on odorant physiochemical features as the basis for perception largely ignores the synthetic and experience-dependent nature of olfaction. Olfaction is synthetic, as mammals have only limited ability to identify elements within even simple odor mixtures. Furthermore, olfaction is experience-bound, as exposure alone can significantly affect the extent to which stimuli can be discriminated. We propose that early analytical processing of odors is inaccessible at the behavioral level and that all odors are initially encoded as `objects' in the piriform cortex. Moreover, we suggest that odor perception is wholly dependent on the integrity of this memory system and that its loss severely impairs normal perception. |
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