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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...

Physiology of Smell and Olfactory Pathway

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...

Olfactory Receptors: Location and Structure

Olfactory Receptors: Location and Structure

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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Related Experiment Video

Updated: Jun 7, 2026

A Free-breathing fMRI Method to Study Human Olfactory Function

A Free-breathing fMRI Method to Study Human Olfactory Function

Published on: July 30, 2017

Attitudes toward Olfaction: A Cross-regional Study.

Han-Seok Seo¹, Marco Guarneros, Robyn Hudson

¹Smell & Taste Clinic, Department of Otorhinolaryngology, University of Dresden Medical School, Dresden, Germany.

Chemical Senses

|October 20, 2010

Summary

This summary is machine-generated.

Regional differences significantly impact how people perceive smell. This study found varying attitudes toward olfaction across Mexican, Korean, Czech, and German populations, highlighting cultural influences on scent perception.

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Area of Science:

Sensory Science
Cross-Cultural Psychology
Neuroscience

Background:

Olfaction, the sense of smell, plays a crucial role in daily life, influencing emotions and social interactions.
Understanding cultural and regional variations in olfactory perception is essential for a comprehensive view of human sensory experience.

Purpose of the Study:

To investigate regional influences on general attitudes toward olfaction.
To examine affective attitudes towards odors across different cultural groups.
To explore the relationship between olfactory sensitivity and general attitudes towards smell.

Main Methods:

Surveying 1082 participants (aged 21-50) from Mexican, Korean, Czech, and German regions.
Assessing general attitudes toward olfaction and affective responses to odors (pleasant/unpleasant).
Categorizing odor preferences into "Food & Drink," "Social relationship," "Nature," and "Civilization" for cross-regional comparison.

Main Results:

Significant regional differences in general attitudes toward olfaction were observed, with Mexicans showing distinct responses.
Women across all regions reported higher interest in olfaction compared to men.
A positive correlation was found between self-rated olfactory sensitivity and general attitudes toward olfaction.
Cross-regional variations were significant in affective attitudes towards specific odor categories.

Conclusions:

Cultural and regional factors demonstrably shape attitudes and affective responses toward the olfactory world.
These findings extend the understanding of how geography and culture influence sensory perception and preferences.
The study underscores the importance of considering regional diversity in olfaction research.