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Related Concept Videos

Olfaction01:25

Olfaction

The sense of smell is achieved through the activities of the olfactory system. It starts when an airborne odorant enters the nasal cavity and reaches olfactory epithelium (OE). The OE is protected by a thin layer of mucus, which also serves the purpose of dissolving more complex compounds into simpler chemical odorants. The size of the OE and the density of sensory neurons varies among species; in humans, the OE is only about 9-10 cm2.
The olfactory receptors are embedded in the cilia of the...
Physiology of Smell and Olfactory Pathway01:20

Physiology of Smell and Olfactory Pathway

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.
The olfactory...
Olfactory Receptors: Location and Structure01:03

Olfactory Receptors: Location and Structure

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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Related Experiment Video

Updated: Jul 2, 2026

Controlled Odor Mimic Permeation Systems for Olfactory Training and Field Testing
05:54

Controlled Odor Mimic Permeation Systems for Olfactory Training and Field Testing

Published on: January 28, 2021

An experimental biomimetic platform for artificial olfaction.

Corrado Di Natale1, Eugenio Martinelli, Roberto Paolesse

  • 1Department of Electronic Engineering, University of Rome Tor Vergata, Rome, Italy. dinatale@uniroma2.it

Plos One
|September 5, 2008
PubMed
Summary
This summary is machine-generated.

This study introduces a novel artificial olfactory system using color indicators to mimic biological olfaction. The system effectively models olfactory phenomena, offering a valuable tool for both chemists and biologists.

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Area of Science:

  • Biophysics
  • Chemical Sensing
  • Neuroscience

Background:

  • Current artificial olfactory systems primarily focus on receptor field features, neglecting other fundamental olfaction properties.
  • Existing artificial systems offer limited utility for biologists needing to model and test olfactory mechanisms.

Purpose of the Study:

  • To develop a simple experimental approach for an artificial olfactory system that accounts for observed olfaction phenomena.
  • To create a versatile platform for testing optical chemical sensors and biological olfactory models.

Main Methods:

  • Constructed an artificial epithelium from broadly selective color indicators in a polymer layer.
  • Probed the epithelium with colored light and imaged responses using a digital camera.
  • Treated pixels as olfactory receptor neurons, classifying responses into artificial glomeruli based on optical properties.

Main Results:

  • Observed spatio-temporal patterns in artificial glomeruli responses, mirroring patterns in the biological olfactory bulb.
  • The model successfully mimicked glomeruli formation, olfactory epithelium zonation, and spatio-temporal signal patterns.
  • Demonstrated a non-homogenous odor exposure leading to distinct glomeruli responses.

Conclusions:

  • The developed artificial olfactory system provides a test vehicle for optical indicator development and olfactory model testing.
  • This platform bridges the gap between instrumental artificial olfaction and biological modeling needs.
  • The system's ability to replicate biological olfactory patterns validates its potential for advancing olfactory research.