Neuroscience

Researchers identify neurons that 'learn' to smell a threat

Whether conscious of it or not, when entering a new space, we use our sense of smell to assess whether it is safe or a threat. In fact, for much of the animal kingdom, this ability is necessary for survival and reproduction. ...

Medical research

Researchers reveal an added layer of nuance in our sense of smell

The delicate fragrance of jasmine is a delight to the senses. The sweet scent is popular in teas, perfumes and potpourri. But take a whiff of the concentrated essential oil, and the pleasant aroma becomes almost cloying. ...

Diseases, Conditions, Syndromes

Scientists find key reason why loss of smell occurs in long COVID-19

The reason some people fail to recover their sense of smell after COVID-19 is linked to an ongoing immune assault on olfactory nerve cells and an associated decline in the number of those cells, a team of scientists led by ...

Medications

Prednisolone does not improve sense of smell after COVID-19

In a study executed by University Medical Center (UMC) Utrecht, it has been demonstrated that prednisolone does not improve a patient's sense of smell after COVID-19. In addition, in most patients—irrespective of prednisolone ...

Neuroscience

Mapping the path from smell to perception

Our sense of smell has a powerful effect on our behavior and emotions. Aromas can evoke vivid memories of the past or warn us of a smoldering fire. Yet to neuroscientists, smell remains the most mysterious of our five senses.

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Olfaction

Olfaction (also known as olfactics or smell) refers to the sense of smell. This sense is mediated by specialized sensory cells of the nasal cavity of vertebrates, and, by analogy, sensory cells of the antennae of invertebrates. For air-breathing animals, the olfactory system detects volatile or, in the case of the accessory olfactory system, fluid-phase chemicals. For water-dwelling organisms, e.g., fish or crustaceans, the chemicals are present in the surrounding aqueous medium. Olfaction, along with taste, is a form of chemoreception. The chemicals themselves which activate the olfactory system, generally at very low concentrations, are called odors.

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