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Related Concept Videos

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...
Physiology of Smell and Olfactory Pathway01:20

Physiology of Smell and Olfactory Pathway

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.
The olfactory...

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Related Experiment Video

Updated: Jul 8, 2026

Simple and Computer-assisted Olfactory Testing for Mice
06:40

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Potential application of electronic odor diffuser in olfaction testing.

Tadashi Ishimaru1, Hitomi Ishimaru1

  • 1Department of Otorhinolaryngology, Hyotan-machi ENT Clinic, Kanazawa, Ishikawa, Japan.

Auris, Nasus, Larynx
|March 24, 2024
PubMed
Summary
This summary is machine-generated.

The AROMASTIC® device, an electronic odor diffuser, demonstrated validity in olfactory testing by correlating well with established T&T olfactometry. This suggests electronic odor generators are promising tools for smell assessments.

Keywords:
AnosmiaHyposmiaOlfaction disordersOlfactometry

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Area of Science:

  • Otorhinolaryngology
  • Neuroscience
  • Medical Device Technology

Background:

  • Olfactory testing varies globally, utilizing different methods like UPSIT (U.S.), Sniffin' Sticks (Europe), and T&T olfactometry (Japan).
  • Electronic odor generators are not standard in olfactory assessments, unlike electronic oscillators in audiometry.

Purpose of the Study:

  • To evaluate the AROMASTIC® device, an electronically controlled odor diffuser, as a potential tool for olfactory testing.
  • To assess the validity of the AROMASTIC® screening test (AS-test) by comparing its results with T&T olfactometry.

Main Methods:

  • Forty participants from an olfactory clinic underwent the AS-test using the AROMASTIC® device, which diffuses five distinct odors.
  • Participants reported the odors they could detect, and the total number of detected odors was recorded as the AS-score.
  • Concurrent olfactory assessment was performed using standard T&T olfactometry.

Main Results:

  • The AS-scores showed a significant correlation with the detection and recognition thresholds obtained from T&T olfactometry.
  • This correlation confirms the AS-test's validity as an olfactory assessment tool.

Conclusions:

  • The AROMASTIC® device, utilizing electronic odor diffusion, shows promise for olfactory testing.
  • Electronic odor generators represent a potentially valuable advancement in the field of olfaction assessment.