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[Odors and olfaction].

Pierre-Marie Lledo1, Alan Carleton, Jean-Didier Vincent

  • 1Institut Pasteur, Unité Postulante Perception et Mémoire olfactive, 25, rue du Docteur Roux, 75724 Paris, France. pmlledo@pasteur.fr

Journal De La Societe De Biologie
|July 24, 2002
PubMed
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The adult olfactory bulb undergoes significant changes due to odor learning, involving persistent neurogenesis. This review explores neural mechanisms underlying olfactory perception and learning in mammals.

Area of Science:

  • Neuroscience
  • Olfactory system biology
  • Sensory perception mechanisms

Background:

  • Olfactory perception is crucial for environmental analysis, alongside audition and vision.
  • Odor detection and learning induce significant neural plasticity in the main olfactory bulb.
  • Interneuron neurogenesis persists in the adult olfactory bulb, contributing to these modifications.

Purpose of the Study:

  • To review neural processes in olfactory perception and learning.
  • To highlight the role of neurogenesis in the adult olfactory bulb.
  • To elucidate the cellular basis of olfactory learning and sensory processing.

Main Methods:

  • Review of existing literature on olfactory system function.
  • Analysis of structural and functional changes in the main olfactory bulb.

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  • Focus on molecular mechanisms and organizational strategies in vertebrate olfactory pathways.

    • Main Results:

    • Odor learning drives structural and functional plasticity in the main olfactory bulb.
    • Persistent interneuron neurogenesis is a key mechanism in adult olfactory bulb modification.
    • The olfactory system employs specific strategies for transducing, encoding, and processing sensory information.

    Conclusions:

    • Neurogenesis in the adult olfactory bulb is vital for olfactory learning.
    • Understanding these neural mechanisms enhances our knowledge of sensory perception.
    • This review focuses on vertebrate and mammalian olfactory systems.