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Related Concept Videos

The Physiology of Taste01:24

The Physiology of Taste

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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...
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Gustation01:43

Gustation

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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.
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Taste Buds and Receptors01:20

Taste Buds and Receptors

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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,...
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Conditioned Taste Aversion01:14

Conditioned Taste Aversion

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Conditioned taste aversion, also known as sauce béarnaise syndrome, is a phenomenon in which an individual develops an aversion to a certain food taste following a negative experience, typically illness. This form of aversion is a type of classical conditioning in which the taste of the food (conditioned stimulus, CS) is associated with the experience of illness (unconditioned stimulus, UCS).
A notable characteristic of conditioned taste aversion is that it often requires only a single...
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Regulation of Water Intake01:25

Regulation of Water Intake

3.0K
Osmolality refers to the number of solute particles per kilogram of solvent in a solution. Plasma osmolality specifically indicates the total number of solute particles per kilogram of water in blood plasma. This value reflects the body's hydration status and is tightly regulated through mechanisms controlling water intake and output. While water consumption is a conscious decision, the body has intrinsic regulatory systems to maintain fluid balance. Dehydration, a state of water deficit...
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Salivary Glands and Saliva01:23

Salivary Glands and Saliva

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The salivary glands, of which there are three pairs known as the parotid, submandibular, and sublingual glands, play a crucial role in maintaining oral health and initiating the digestive process. Positioned near the ears, beneath the masseter muscle, the parotid glands secrete saliva into the oral cavity through the parotid duct of Stensen. Meanwhile, the submandibular glands, located on the floor of the mouth, secrete saliva through channels named submandibular ducts. The sublingual glands,...
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Parabrachial-hypothalamic interactions are required for normal conditioned taste aversions.

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Related Experiment Video

Updated: Mar 10, 2026

Taste Exam: A Brief and Validated Test
07:10

Taste Exam: A Brief and Validated Test

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Sodium Taste During Sodium Appetite.

Ralph Norgren1

  • 1Department of Neural and Behavioral Science, College of Medicine, The Pennsylvania State University, Hershey, PA, USA rxn5@psu.edu.

Chemical Senses
|December 7, 2016
PubMed
Summary

Sodium appetite in animals is a model for motivation. Research challenges how sodium deficits guide sodium (Na+) seeking, finding current sensory neural code hypotheses unlikely.

Area of Science:

  • Neuroscience
  • Sensory Science
  • Animal Behavior

Background:

  • Sodium appetite is a key model for understanding motivation and neural control.
  • Systemic sodium deficits drive animals to seek and ingest sodium (Na+) ions.
  • Existing hypotheses involve alterations in the sensory neural code for Na+ on the tongue.

Purpose of the Study:

  • To challenge two prevailing hypotheses explaining how sodium deficits guide sodium-seeking behavior.
  • To investigate the role of sensory neural code modifications in response to sodium (Na+) ions.

Main Methods:

  • Three distinct behavioral experiments were conducted.
  • The experiments tested predictions derived from two hypotheses regarding sodium (Na+) sensory processing.
Keywords:
behaviormotivationsensory codingsodium appetite

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Psychophysical Tracking Method to Measure Taste Preferences in Children and Adults
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Psychophysical Tracking Method to Assess Taste Detection Thresholds in Children, Adolescents, and Adults: The Taste Detection Threshold TDT Test
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Related Experiment Videos

Last Updated: Mar 10, 2026

Taste Exam: A Brief and Validated Test
07:10

Taste Exam: A Brief and Validated Test

Published on: August 17, 2018

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Psychophysical Tracking Method to Measure Taste Preferences in Children and Adults
09:17

Psychophysical Tracking Method to Measure Taste Preferences in Children and Adults

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Psychophysical Tracking Method to Assess Taste Detection Thresholds in Children, Adolescents, and Adults: The Taste Detection Threshold TDT Test
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Main Results:

  • The results of the behavioral experiments did not support either of the tested hypotheses.
  • Evidence suggests that changes in Na+ signal amplitude or hedonic tone are unlikely explanations for sodium appetite.

Conclusions:

  • Current hypotheses regarding sensory neural code modifications for sodium (Na+) are challenged by this study.
  • The findings indicate a need for alternative explanations for the neural mechanisms underlying sodium appetite.