Health

Smell sensitivity varies with circadian rhythm, study suggests

It has always been apparent that some individuals have a better sense of smell than others, but a new study of 37 teens provides the first direct evidence that within each person, smell sensitivity varies over the course ...

Neuroscience

Elderly who have trouble identifying odors face risk of dementia

A long-term study of nearly 3,000 adults, aged 57 to 85, found that those who could not identify at least four out of five common odors were more than twice as likely as those with a normal sense of smell to develop dementia ...

Neuroscience

Experts probe possible reasons for loss of smell

Studies have shown that loss of the sense of smell can be among the first warning signs of diseases such as Alzheimer's and Parkinson's. Now a researcher at the Perelman School of Medicine at the University of Pennsylvania ...

Health

Common problem for older adults: Losing the five key senses

It's a well-known fact that aging can lead to losing one's senses: vision, smell, hearing, touch, and taste. In previous studies, researchers have learned about the consequences of experiencing a decline in a single sense. ...

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