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Intensity coding in olfactory receptor cells

D Trotier1

  • 1Laboratoire de Neurobiologie Sensorielle, Massy, France.

Seminars in Cell Biology
|February 1, 1994
PubMed
Summary
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Olfactory receptors translate odorant concentration into neural signals. This study details membrane conductances in olfactory receptor cells, revealing mechanisms for impulse frequency coding and repetitive firing.

Area of Science:

  • Neuroscience
  • Olfactory receptor cell physiology

Background:

  • Olfactory receptors (ORs) convert odorant concentrations into electrical signals.
  • Membrane conductances in ORs are crucial for signal transduction and coding.

Purpose of the Study:

  • To investigate the membrane conductances in olfactory receptor cells.
  • To elucidate the mechanisms underlying impulse frequency coding of odorant concentration.

Main Methods:

  • Patch-clamp recordings were used to study membrane conductances in olfactory receptor cells.
  • Original data on resting potential and impulse frequency coding were collected.

Main Results:

  • Odorant-gated conductances (cAMP- or IP3-sensitive channels) in cilia depolarize the cell.

Related Experiment Videos

  • Depolarization- and Ca2+-activated conductances modulate membrane potential oscillations and firing patterns.
  • Data on resting potential and odorant concentration-dependent impulse frequency are presented.

    • Conclusions:

    • Specific membrane conductances play distinct roles in olfactory signal processing.
    • These conductances are essential for encoding odorant concentration and regulating neuronal firing.