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      Mechanisms of olfactory discrimination: converging evidence for common principles across phyla.

      1 ,
      Annual review of neuroscience
      Annual Reviews

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          Abstract

          Olfaction begins with the transduction of the information carried by odor molecules into electrical signals in sensory neurons. The activation of different subsets of sensory neurons to different degrees is the basis for neural encoding and further processing of the odor information by higher centers in the olfactory pathway. Recent evidence has converged on a set of transduction mechanisms, involving G-protein-coupled second-messenger systems, and neural processing mechanisms, involving modules called glomeruli, that appear to be adapted for the requirements of different species. The evidence is highlighted in this review by focusing on studies in selected vertebrates and in insects and crustaceans among invertebrates. The findings support the hypothesis that olfactory transduction and neural processing in the peripheral olfactory pathway involve basic mechanisms that are universal across most species in most phyla.

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          Author and article information

          Journal
          Annu Rev Neurosci
          Annual review of neuroscience
          Annual Reviews
          0147-006X
          0147-006X
          1997
          : 20
          Affiliations
          [1 ] ARL Division of Neurobiology, University of Arizona, Tucson 85721, USA.
          Article
          10.1146/annurev.neuro.20.1.595
          9056726
          75b42c98-2a81-4d35-b38a-8e059a73d621
          History

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