What is Olfactory and The Olfactory System

ol·fac·to·ry

A term sparingly used in the fragrance communication world that relates to the sense of smell. "the olfactory organs";

The olfactory system, or sense of smell, is the part of the sensory system used for smelling (olfaction). Most mammals and reptiles have a main olfactory system and an accessory olfactory system. The main olfactory system detects airborne substances, while the accessory system senses fluid-phase stimuli.

Olfactory fatigue, also known as odor fatigue or olfactory adaptation, is the temporary, normal inability to distinguish a particular odor after a prolonged exposure to that airborne compound. For example, when entering a restaurant initially the odor of food is often perceived as being very strong, but after time the awareness of the odor normally fades to the point where the smell is not perceptible or is much weaker. After leaving the area of high odor, the sensitivity is restored with time. Anosmia is the permanent loss of the sense of smell, and is different from olfactory fatigue.


OLFACTION
Relating to the sense of smell.

OLFACTORY
Relating to, or concerned with, the sense of smell.

OLFACTORY BULB
The first region of the brain to receive sensory inputs from the olfactory epithelium. The olfactory bulb presents the initial input and communicates via multiple pathways with numerous other regions of the brain, e.g. limbic system, hypothalamus and cortex.

OLFACTORY EPITHELIUM
Layer of sensory cells in the upper-rear portion of the nose. Each side of the nose contains roughly 15 million sensory cells in the epithelium.


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