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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...
Tactile and Chemical Senses01:27

Tactile and Chemical Senses

Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex. This...
Gustation01:43

Gustation

Gustation is a chemical sense that, along with olfaction (smell), contributes to our perception of taste. It starts with the activation of receptors by chemical compounds (tastants) dissolved in the saliva. The saliva and filiform papillae on the tongue distribute the tastants and increase their exposure to the taste receptors.
The Physiology of Taste01:24

The Physiology of Taste

The perception of a salty flavor is facilitated by sodium ions within the oral salivary fluid. Upon consumption of a salty substance, salt crystals disassemble, leading to the liberation of its constituents—Na+ and Cl- ions. These ions subsequently dissolve into the salivary fluid present in the oral cavity. The external environment of the gustatory cells experiences an elevation in Na+ concentration, thereby establishing a potent concentration gradient. This gradient propels the diffusion of...

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Related Experiment Video

Updated: Jun 17, 2026

A Lateralized Odor Learning Model in Neonatal Rats for Dissecting Neural Circuitry Underpinning Memory Formation
10:42

A Lateralized Odor Learning Model in Neonatal Rats for Dissecting Neural Circuitry Underpinning Memory Formation

Published on: August 18, 2014

Early transformations in odor representation.

Thomas A Cleland1

  • 1Department of Psychology, Cornell University, Ithaca, NY 14853, USA. tac29@cornell.edu

Trends in Neurosciences
|January 12, 2010
PubMed
Summary
This summary is machine-generated.

Neural computations transform sensory information, with the olfactory bulb using unique algorithms for odor processing due to high-dimensional odor space. This suggests the olfactory bulb is comparable to the retina and primary visual cortex.

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Last Updated: Jun 17, 2026

A Lateralized Odor Learning Model in Neonatal Rats for Dissecting Neural Circuitry Underpinning Memory Formation
10:42

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Published on: August 18, 2014

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Real-time In Vitro Monitoring of Odorant Receptor Activation by an Odorant in the Vapor Phase

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Area of Science:

  • Neuroscience
  • Sensory Processing
  • Computational Neuroscience

Background:

  • Neural computations transform sensory representations across stages.
  • Early sensory computations can differ across modalities despite commonalities.
  • The olfactory bulb's processing mechanisms are increasingly understood.

Purpose of the Study:

  • To clarify neural algorithms in early odor processing.
  • To explore how high-dimensional odor space influences neural computations.
  • To compare olfactory bulb processing to other sensory systems.

Main Methods:

  • Analysis of neural algorithms in the olfactory bulb.
  • Investigation of similarity-dependent computations like decorrelation.
  • Examination of the architectures of computational layers in the olfactory bulb.

Main Results:

  • High-dimensionality of odor space necessitates unusual neural algorithms for computations like decorrelation.
  • Distinct architectures in olfactory bulb layers suggest specialized processing.
  • Olfactory bulb processing shares functional similarities with the retina and primary visual cortex.

Conclusions:

  • The olfactory bulb employs unique neural algorithms for odor processing, driven by odor space dimensionality.
  • The olfactory bulb's computational architecture supports complex sensory transformations.
  • Functional parallels exist between the olfactory bulb, retina, and primary visual cortex.