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Gustation

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 Taste

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...

Regulation of Food Intake

Regulation of Food Intake

Short-term regulation of food intake primarily involves neural signals from the gastrointestinal (GI) tract, blood nutrient levels, and GI tract hormones. Communication between the gut and brain via vagal nerve fibers plays a significant role in evaluating the contents of the gut. Clinical studies have shown that protein ingestion produces a more prolonged response in these nerve fibers compared to an equivalent amount of glucose. Additionally, the activation of stretch receptors caused by GI...

Taste Buds and Receptors

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,...

Primary Motives: Hunger and Thirst

Primary Motives: Hunger and Thirst

Hunger and thirst are fundamental physiological drives crucial for maintaining homeostasis and ensuring the survival of both humans and animals. These drives are regulated through complex interactions between the brain, hormones, and sensory receptors.
Hunger arises when the brain detects changes in the body's nutrient levels, including glucose, lipids, amino acids, and hormones such as ghrelin and leptin. The hypothalamus plays a central role in hunger regulation. The lateral hypothalamus acts...

Conditioned Taste Aversion

Conditioned Taste Aversion

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 exposure...

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Related Experiment Video

Updated: May 22, 2026

Studying Food Reward and Motivation in Humans

Studying Food Reward and Motivation in Humans

Published on: March 19, 2014

Sweetness, satiation, and satiety.

France Bellisle¹, Adam Drewnowski, G Harvey Anderson

¹Centre de Recherche en Nutrition Humaine d'Ile de France, Université Paris, Bobigny, France. f.bellisle@uren.smbh.univ-paris13.fr

The Journal of Nutrition

|May 11, 2012

Summary

Understanding appetite control involves satiation and satiety, key to inhibiting eating. This review explores how foods and drinks, including those with sweeteners, influence these factors for weight management.

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Last Updated: May 22, 2026

Studying Food Reward and Motivation in Humans

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Published on: March 19, 2014

Sucrose Preference and Novelty-Induced Hypophagia Tests in Rats using an Automated Food Intake Monitoring System

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Published on: May 8, 2020

Concept Development and Use of an Automated Food Intake and Eating Behavior Assessment Method

Concept Development and Use of an Automated Food Intake and Eating Behavior Assessment Method

Published on: February 19, 2021

Area of Science:

Nutrition Science
Appetite Regulation
Food Reward Mechanisms

Background:

Satiation and satiety are critical for appetite control, influencing eating inhibition.
Enhancing these sensations is a strategy for weight management.
Factors influencing satiation and satiety include sensory, cognitive, and physiological elements.

Purpose of the Study:

To review the satiating power of foods and drinks with nutritive and nonnutritive sweeteners.
To discuss the role of brain mechanisms in food reward (liking and wanting).
To highlight the importance of reward homeostasis in controlling food intake.

Main Methods:

Literature review of studies on satiation and satiety.
Analysis of factors affecting eating inhibition.
Examination of energy intake from fluids versus solid foods.
Discussion of brain reward mechanisms.

Main Results:

Sweetness influences intake, but satiation and satiety depend on volume, nutrients, and energy.
The satiating effect of fluids versus solids remains debated.
Brain reward pathways (liking/wanting) and reward homeostasis are crucial for intake control.

Conclusions:

Sweeteners impact satiation and satiety, with effects influenced by food matrix and energy content.
Understanding reward homeostasis is vital for preventing non-hunger-driven eating.
Further research is needed on fluid energy compensation and sweetener effects.