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Related Concept Videos

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...
Taste Buds and Receptors01:20

Taste Buds and Receptors

Gustation, or the sense of taste, is intrinsically linked to the anatomical structures located on the tongue. This organ's surface, along with the entirety of the oral cavity, is adorned with stratified squamous epithelium. Evident on the tongue are elevated structures known as papillae (singular = papilla), which house the mechanisms for the transduction of gustatory stimuli. Four distinct types of papillae exist, each identified by their unique morphological attributes: the circumvallate,...
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.
Neural Regulation01:37

Neural Regulation

Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
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...
G-Protein Gated Ion Channels01:21

G-Protein Gated Ion Channels

GPCRs are primarily responsible for our sense of smell, taste, and vision.  The binding of a sensory stimulus activates GPCR to stimulate effector proteins, many of which are ion channels in the sensory organs. GPCRs modulate the opening and closing of the target ion channels either directly by binding them, or by releasing second messengers that activate these channels. As ions move across the membrane, the membrane potential is altered, which induces an appropriate response.
Sensory organs,...

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Related Experiment Video

Updated: Jul 19, 2026

New Methods to Study Gustatory Coding
10:59

New Methods to Study Gustatory Coding

Published on: June 29, 2017

The neural mechanisms of gustation: a distributed processing code.

Sidney A Simon1, Ivan E de Araujo, Ranier Gutierrez

  • 1Department of Neurobiology, Duke University, Durham, North Carolina 27710, USA. sas@neuro.duke.edu

Nature Reviews. Neuroscience
|October 21, 2006
PubMed
Summary

Taste and oral sensory information are processed by the brain using distributed codes. These codes represent both the taste (gustation) and post-ingestive properties of food.

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Related Experiment Videos

Last Updated: Jul 19, 2026

New Methods to Study Gustatory Coding
10:59

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Published on: June 29, 2017

In vivo Calcium Imaging of Mouse Geniculate Ganglion Neuron Responses to Taste Stimuli
07:27

In vivo Calcium Imaging of Mouse Geniculate Ganglion Neuron Responses to Taste Stimuli

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07:40

Whole-Mount Staining, Visualization, and Analysis of Fungiform, Circumvallate, and Palate Taste Buds

Published on: February 11, 2021

Area of Science:

  • Neuroscience
  • Sensory Science
  • Food Science

Background:

  • Food intake involves complex sensory processing beyond taste.
  • Oral somatosensory information (texture, temperature) and odorants are crucial for food perception.
  • The brain integrates multiple sensory inputs to create the sensation of flavor.

Purpose of the Study:

  • To evaluate taste and oral somatosensory peripheral transduction mechanisms.
  • To investigate the multi-sensory integrative functions of central pathways in gustation.
  • To understand how the brain codes for sensory and post-ingestive properties of tastants.

Main Methods:

  • Analysis of peripheral transduction mechanisms for taste and oral somatosensation.
  • Examination of central neural pathways involved in integrating gustatory and somatosensory information.
  • Review of recent experimental data on neural coding of tastants.

Main Results:

  • Taste receptors and various sensory fibers are activated simultaneously when food enters the mouth.
  • Central gustatory circuits integrate taste, texture, temperature, and odor information.
  • Brain circuits utilize distributed ensemble codes to represent tastant properties.

Conclusions:

  • Gustation is a complex sensation supported by integrated multi-sensory pathways.
  • Distributed neural codes are essential for representing both sensory and post-ingestive aspects of food.
  • Understanding these mechanisms provides insight into food perception and consumption.