News tagged with sensory neurons

Related topics: neurons

A short stay in darkness may heal hearing woes

Call it the Ray Charles Effect: a young child who is blind develops a keen ability to hear things that others cannot. Researchers have long known that very young brains are malleable enough to re-wire some ...

Feb 05, 2014
popularity 5 / 5 (6) | comments 1 | with audio podcast

'Sensational' barrels in the brain

A new study from scientists at the Tata Institute of Fundamental Research (TIFR), Mumbai, gives an insight into how the circuitry for high resolution signal processing is wired in the brain.

Nov 18, 2013
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When neurons have less to say, they speak up

The brain is an extremely adaptable organ – but it is also quite conservative. That's in short, what scientists from the Max Planck Institute of Neurobiology in Martinsried and their colleagues from the ...

Oct 16, 2013
popularity 4.6 / 5 (11) | comments 1 | with audio podcast

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