News tagged with sense of smell

Related topics: brain

Early sign of Alzheimer's reversed in lab

One of the earliest known impairments caused by Alzheimer's disease - loss of sense of smell – can be restored by removing a plaque-forming protein in a mouse model of the disease, a study led by a Case Western Reserve ...

Nov 30, 2011
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Hunger hormone enhances sense of smell

An appetite-stimulating hormone causes people and animals to sniff odors more often and with greater sensitivity, according to a new study in the April 13 issue of The Journal of Neuroscience. The findings suggest ghreli ...

Apr 12, 2011
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No new neurons in the human olfactory bulb

(Medical Xpress) -- Research from Karolinska Institutet shows that the human olfactory bulb - a structure in the brain that processes sensory input from the nose - differs from that of other mammals in that no new neurons ...

May 24, 2012
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Alzheimer's protein kills nerve cells in nose

A protein linked to Alzheimer's disease kills nerve cells that detect odors, according to an animal study in the September 28 issue of The Journal of Neuroscience. The findings shed light on why people with Alzheimer's diseas ...

Sep 27, 2011
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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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