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OLFACTION

Smell is not a physical, but a chemical sense.

Figure 1:Smell is not a physical, but a chemical sense.[1]

We do not know as much about how we smell as we do about our other senses.

CHEMISTRY

PSYCHOLOGY

Psychophysics

Scents

ANATOMY

Nose

Cartilage of the nose.

Figure 3:Cartilage of the nose.[2]

Turbinates of the nose.

Figure 5:Turbinates of the nose.[3]

Olfactory Epithelium

The sensory area of the nose is called the “olfactory epithelium” (yellow).

Figure 7:The sensory area of the nose is called the “olfactory epithelium” (yellow).[4]

BRAIN

Glomeruli

Neuronal circuitry of olfactory sensory neurons (OSN). OSN’s that respond to (are tuned for) the same olfactants (chemicals), converge (meet) at the same glomerulus (plural: glomeruli).

Figure 9:Neuronal circuitry of olfactory sensory neurons (OSN). OSN’s that respond to (are tuned for) the same olfactants (chemicals), converge (meet) at the same glomerulus (plural: glomeruli).[5]

Olfactory Bulb

the olfactory bulbs and the olfactory tract.

Figure 11:the olfactory bulbs and the olfactory tract.[6]

Olfactory Areas

Footnotes

  1. public domain image source

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SENSATION AND PERCEPTION
TOUCH
SENSATION AND PERCEPTION
GUSTATION