News tagged with sensory neurons

Related topics: neurons

Our elegant brain: Motor learning in the fast lane

It takes a surprisingly small cluster of brain cells deep within the cerebellum to learn how to serve a tennis ball, or line up a hockey shot. Researchers at McGill University led by Kathleen Cullen from the Department of ...

Aug 03, 2015
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Water to understand the brain

To observe the brain in action, scientists and physicians use imaging techniques, among which functional magnetic resonance imaging (fMRI) is the best known. These techniques are not based on direct observations of electric ...

Jul 02, 2015
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Odor receptors do much more than pick up scents

Smell is the only sensory system with a back up, which throughout most of adult life forms new sensory neurons that express specific odor receptors. Now Yale researchers led by Charles Greer and Diego Rodriguez-Gil have discovered ...

Apr 21, 2015
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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

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