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Related Concept Videos

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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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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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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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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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Conditioned Taste Aversion01:14

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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).
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Phase II Reactions: Miscellaneous Conjugation Reactions01:19

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Phase II biotransformations are detoxification mechanisms that conjugate xenobiotics with endogenous substances, neutralizing their toxicity.
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Related Experiment Video

Updated: Jun 30, 2025

Whole-Mount Staining, Visualization, and Analysis of Fungiform, Circumvallate, and Palate Taste Buds
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Taste and smell function in Wilson's disease.

Mandy K Salmon1, William G Cohen1, Fengling Hu2

  • 1Department of Otorhinolaryngology- Head and Neck Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA; Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.

Journal of the Neurological Sciences
|March 17, 2024
PubMed
Summary

Wilson's disease (WD) impairs smell but not taste function. Further research is needed to understand why smell is affected while taste remains intact in WD patients.

Keywords:
GustationOlfactionTasteWilson's neurodegeneration

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Area of Science:

  • Neurology
  • Metabolic Disorders
  • Sensory Science

Background:

  • Wilson's disease (WD) is a genetic metabolic disorder characterized by excessive copper accumulation.
  • Abnormal copper metabolism in WD leads to hepatic, neurologic, and psychiatric manifestations.
  • While olfactory dysfunction in WD has been noted, taste function has not been investigated.

Purpose of the Study:

  • To investigate and compare taste and smell function in patients with Wilson's disease (WD) and healthy controls.
  • To determine if WD affects taste perception.
  • To evaluate olfactory function in WD patients.

Main Methods:

  • Quantitative taste and smell tests were administered to 29 WD patients and 790 healthy controls.
  • Taste was assessed using the Waterless Empirical Taste Test (WETT®).
  • Smell was evaluated using the revised University of Pennsylvania Smell Identification Test (R-UPSIT®), with data analyzed using multiple linear regression, controlling for age and sex.

Main Results:

  • No significant difference in taste test scores was observed between WD patients and controls (p=0.242).
  • WD patients exhibited significantly reduced olfactory function compared to controls (p<0.001).
  • Neither taste nor smell function was influenced by WD symptom subtype, medication, or duration since diagnosis.

Conclusions:

  • Wilson's disease significantly impairs olfactory function but spares taste perception.
  • The divergence in sensory deficits warrants further investigation into the underlying pathophysiological mechanisms.
  • Understanding these mechanisms could offer new insights into WD and sensory system interactions.