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The process of olfaction, also known as the sense of smell, is a sophisticated chemical response system. The specialized sensory neurons that facilitate this process, known as olfactory receptor neurons, are situated in an upper segment of the nasal cavity, known as the olfactory epithelium. Olfactory sensory neurons are bipolar, with their dendrites extending from the epithelium's apex into the mucus that lines the nasal cavity. Airborne molecules, when inhaled, traverse the olfactory...
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Humans detect odors with the help of specialized cells located in the upper part of the nasal cavity, called olfactory receptor neurons (ORNs). ORNs possess hair-like structures called cilia, which are receptive to sensations from the inhaled air. When an odorant molecule binds to a specific receptor on the cell of the cilia, it leads to a series of events that ultimately cause the ORN to send electrical signals to the olfactory bulb in the brain through the olfactory nerves.
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Updated: May 4, 2026

A Lateralized Odor Learning Model in Neonatal Rats for Dissecting Neural Circuitry Underpinning Memory Formation
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Olfactory neuroscience: normalization is the norm.

Elizabeth J Hong1, Rachel I Wilson1

  • 1Department of Neurobiology, Harvard Medical School, 220 Longwood Ave., Boston, MA 02115, USA.

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PubMed
Summary
This summary is machine-generated.

Neural circuits in both vertebrates and invertebrates share strategies for stable odor perception across various concentrations. This research reveals conserved mechanisms in olfactory processing.

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Area of Science:

  • Neuroscience
  • Olfactory system research
  • Comparative biology

Background:

  • Odor representations in neural circuits are crucial for sensory perception.
  • Understanding how these representations remain stable across different odor concentrations is a key challenge in neuroscience.

Purpose of the Study:

  • To investigate whether neural circuits in vertebrates and invertebrates employ common strategies to stabilize odor representations.
  • To identify conserved mechanisms in olfactory processing across diverse species.

Main Methods:

  • Comparative analysis of neural circuit function in representative vertebrate and invertebrate species.
  • Electrophysiological recordings and computational modeling to assess odor representation stability.

Main Results:

  • Neural circuits from both vertebrates and invertebrates demonstrate shared strategies for stabilizing odor representations.
  • These common strategies are effective across a wide dynamic range of odor concentrations.

Conclusions:

  • The findings suggest a conserved evolutionary basis for olfactory processing mechanisms.
  • Common neural strategies ensure reliable odor perception in diverse animal groups, highlighting fundamental principles of sensory coding.