100 Things You Should Know About People: #68 — Smells Evoke Emotions and Memories

Picture of a nose

Do you have a type of food that makes you feel a certain way? When you smell it you have an emotional reaction? For me it is kasha. Kasha is a form of buckwheat. You cook the buckwheat kernals in oil and then boil them (with salt, pepper, onion, and garlic).  I’ve never met very many people that have actually eaten kasha, much less know what kasha is.

When I smell kasha cooking I get a big smile on my face and I feel happy. This is because my mom used to cook kasha. I have a positive emotional memory of my mom when I smell kasha cooking.

A special path for smells — The thalamus is a part of the brain that is between the cerebral cortex and the midbrain. One of the functions of the thalamus is to process sensory information and send it to the appropriate part of the cortex. For example, visual information comes from the retina, goes to the thalamus and then gets routed to the primary visual cortex. All of the senses send their data to the thalamus before the information goes anywhere else, with the exception of smell. The olfactory system does not go through the thalamus. When you smell something, that sensory data goes right to your amygdala. The amygdala is where emotional information is processed. This is why people react emotionally to smells: You smell a flower and it makes you happy. You smell rotten meat and it makes you feel disgusted. The amygdala is right next to the memory centers of the brain. This is also why you can smell something and have memories invoked.

Smells from a web site? — For a reasonable amount of money you can now buy an olfactory machine that hooks up to your PC, and software that emits many different scents (forest, ocean, turkey, chocolate, etc).  It’s the ScentScape from ScentSciences (www.scentsciences.com)

What do you think? Is there a smell in your favorite websites future?