Parkinson's & Movement disorders

'E-nose' could someday diagnose Parkinson's disease by 'smelling' skin

A couple of years ago, a woman named Joy Milne made headlines when scientists discovered that she could "smell" Parkinson's disease (PD) on people with the neurodegenerative disorder. Since then, researchers have been trying ...

Neuroscience

Olfactory processing in three distinct neural waves

Neural waves of three distinct registers combine to give the brain a picture of what's being smelled, according to a Northwestern Medicine study published in PLOS Biology.

Diseases, Conditions, Syndromes

How one of the oldest natural insecticides keeps mosquitoes away

With mosquito season upon us, people are stocking up on repellents to prevent itchy bites. Bug repellents are important because they don't just protect against the buzzing, blood-sucking little pests—they also safeguard ...

Medical research

The neurobiology of food attraction

Animals use their sense of smell to navigate the world—to find food, sniff out mates and smell danger. But when a hungry animal smells food and a member of the opposite sex at the same time, what makes dinner the more attractive ...

Neuroscience

Exposure to smells in early infancy can modulate adult behavior

Imprinting is a popularly known phenomenon, wherein certain animals and birds become fixated on sights and smells they see immediately after being born. In ducklings, this can be the first moving object, usually the mother ...

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Odor

An odor or odour is caused by one or more volatilized chemical compounds, generally at a very low concentration, that humans or other animals perceive by the sense of olfaction. Odors are also commonly called scents, which can refer to both pleasant and unpleasant odors. The terms fragrance, scent, and aroma are used primarily by the food and cosmetic industry to describe a pleasant odor, and are sometimes used to refer to perfumes. In contrast, malodor, stench, reek, and stink are used specifically to describe unpleasant odors.

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