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Olfaction

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...

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Related Experiment Video

Updated: Sep 17, 2025

Simple and Computer-assisted Olfactory Testing for Mice

Simple and Computer-assisted Olfactory Testing for Mice

Published on: June 15, 2015

Comparative Review of Olfactory Assessment Methods.

Kush S Patel¹, Charles S Ebert², Keonho A Kong¹

¹Department of Otolaryngology - Head & Neck Surgery, University of Mississippi Medical Center, Jackson, MS, USA.

Ear, Nose, & Throat Journal

|June 28, 2025

Summary

This summary is machine-generated.

Accurate olfactory dysfunction (OD) testing is crucial. Current methods involve subjective (less reliable) and objective (precise but costly) assessments, highlighting a need for balanced, accessible diagnostic tools.

Keywords:

Affective Impact of Odor Scale (AIO)Affordable Rapid Olfactory Measurement Array (AROMA)Brief Smell Identification Test (BSIT)Odor Awareness Scale (OAS)Smell Identification Test (SIT)Sniffin Sticks University of Pennsylvania Smell Identification Test (UPSIT)Vividness of Olfactory Imagery Questionnaire (VOIQ)olfactory dysfunction

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Area of Science:

Otolaryngology
Neuroscience
Diagnostic Medicine

Background:

Olfactory dysfunction (OD) diagnosis and monitoring are critical due to the sense of smell's role in various health conditions.
Current assessment methods include subjective (perceptual) and objective (psychophysical) measures.
A need exists for olfactory assessment tools that balance accuracy, cost, and practicality.

Purpose of the Study:

To review and compare the effectiveness of different olfactory assessment tools.
To analyze the sensitivity, ease of administration, and cost-efficiency of popular olfactory tests used by otolaryngology providers.

Main Methods:

Scholarly review of studies evaluating various olfactory assessment tools.
Analysis based on sensitivity for detecting OD, administration ease, and cost-effectiveness.

Main Results:

Subjective assessments are convenient and cost-effective but have variable reliability due to individual perception and cognitive biases.
Objective tests offer precise, standardized results but are limited by cost, required expertise, and testing duration.
A trade-off exists between the cost, reliability, and practicality of current olfactory assessment methods.

Conclusions:

Objective methods are the current standard for olfactory assessment but have practical limitations.
Development of more accessible olfactory testing is necessary.
Future research should explore hybrid models combining subjective and objective measures for comprehensive, cost-effective olfactory assessment.