Diseases, Conditions, Syndromes

Why does coronavirus make people lose their sense of smell?

To begin with, it was just anecdotal reports. Ear, nose and throat specialists from around the world were sharing their experiences on online message boards—they were all seeing a spike in patients experiencing anosmia, ...

Neuroscience

Common protein in skin can 'turn on' allergic itch

A commonly expressed protein in skin—periostin—can directly activate itch-associated neurons in the skin, according to new research from North Carolina State University. The researchers found that blocking periostin receptors ...

Neuroscience

Loss of 'Jedi' receptor alters neuron activity

The cell bodies of peripheral sensory neurons that respond to and transmit information about stimuli including touch, temperature and pain reside in the dorsal root ganglia (DRG). DRG neuron hyperexcitability is correlated ...

page 1 from 24

Sensory neuron

Sensory neurons are neurons that are activated by sensory input (vision, touch, hearing, etc.), and send projections into the central nervous system that convey sensory information to the brain or spinal cord. Unlike neurons of the central nervous system, whose inputs come from other neurons, sensory neurons are activated by physical modalities such as light, sound, temperature, chemical stimulation, etc.

In complex organisms, sensory neurons relay their information to the central nervous system or in less complex organisms, such as the hydra, directly to motor neurons and sensory neurons also transmit information (electrical impulses) to the brain, where it can be further processed and acted upon. For example, olfactory sensory neurons make synapses with neurons of the olfactory bulb, where the sense of olfaction (smell) is processed.

At the molecular level, sensory receptors located on the cell membrane of sensory neurons are responsible for the conversion of stimuli into electrical impulses. The type of receptor employed by a given sensory neuron determines the type of stimulus it will be sensitive to. For example, neurons containing mechanoreceptors are sensitive to tactile stimuli, while olfactory receptors make a cell sensitive to odors.

This text uses material from Wikipedia, licensed under CC BY-SA