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Related Concept Videos

Olfactory Receptors: Location and Structure01:03

Olfactory Receptors: Location and Structure

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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...
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Olfaction01:25

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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.
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Physiology of Smell and Olfactory Pathway01:20

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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.
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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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A thorough assessment of respiratory health is paramount in clinical settings to identify and manage respiratory distress and ensure adequate oxygenation. This article elaborates on the critical aspects of respiratory evaluation, including airway assessment, skin color examination, and the observation of accessory muscle use, which are integral to effectively diagnosing and managing patients with respiratory conditions.
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Related Experiment Video

Updated: Sep 5, 2025

An Olfactory Preference Test for Measuring Olfactory Hedonic Biases in Mouse Models of Depression
06:34

An Olfactory Preference Test for Measuring Olfactory Hedonic Biases in Mouse Models of Depression

Published on: July 11, 2025

212

Well-being in patients with olfactory dysfunction.

Yiling Mai1, Susanne Menzel1, Mandy Cuevas1

  • 1Smell and Taste Clinic, Department of Otorhinolaryngology, Technical University of Dresden, Dresden, Germany.

Physiology & Behavior
|July 9, 2022
PubMed
Summary
This summary is machine-generated.

Olfactory disorder significantly impacts well-being, with severe dysfunction linked to poorer outcomes. Improving olfactory function, particularly sensitivity, is crucial for enhancing well-being in these patients.

Keywords:
AnosmiaHyposmiaOlfactory dysfunctionParosmiaPhantosmiaWell-being

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Area of Science:

  • Otorhinolaryngology
  • Psychology
  • Quality of Life Research

Background:

  • Olfactory disorder (OD) affects a significant portion of the population.
  • Understanding the impact of OD on patient well-being (WB) is crucial for effective management.
  • Both quantitative and qualitative olfactory dysfunctions may influence psychological health.

Purpose of the Study:

  • To investigate well-being differences in patients with olfactory disorder.
  • To identify factors associated with well-being in OD patients.
  • To compare well-being across different types and severities of olfactory dysfunction.

Main Methods:

  • Cross-sectional, retrospective study of 470 OD patients.
  • Assessment of well-being using the WHO-5 questionnaire.
  • Evaluation of quantitative olfactory function (Sniffin' Sticks) and qualitative dysfunction.

Main Results:

  • 35% of OD patients reported poor well-being, exceeding general population norms.
  • Anosmia and severe parosmia were associated with significantly lower well-being scores.
  • Post-infectious and sinonasal OD causes correlated with poorer well-being compared to idiopathic and post-traumatic.
  • Olfactory sensitivity (Threshold test) showed a positive correlation with well-being.

Conclusions:

  • Quantitative and qualitative olfactory dysfunction are linked to reduced well-being.
  • Severe olfactory dysfunction is particularly detrimental to patient well-being.
  • Improving olfactory function, especially sensitivity, may enhance the well-being of OD patients.