Word Finder - neurons

definition

A cell of the nervous system, which conducts nerve impulses; consisting of an axon and several dendrites. Neurons are connected by synapses.

definition

A nervure of an insect's wing.

definition

An artificial neuron (mathematical function serving as an essential unit of an artificial neural network)

Nerve cells, or neurons, perform many functions in the body.

But when neurons are linked together it is found that nerve impulses will only pass from neuron A to neuron B, and not from neuron B to neuron A; that is, the transmission of the excited state or nervous impulse, although possible in each neuron both up and down its own cell branches, is possible from one nerve cell to another in one direction only.

The axons of the motor neurons are, inasmuch as they are nerve fibres in nerve trunks, easily accessible to artificial stimuli.

Hence, when cut off from these sources, the nutrition of the neurons of various central mechanisms suffers.

The dorsal horns are where sensory neurons enter the spinal cord.

Motor neurons that survive develop new terminal axon sprouts in response to an unknown stimulus.

These special neurons make a pain blocking agent called enkephalin.

This histological and MRI evidence of lesions indicates that the polio virus both damaged and destroyed neurons in CNS territories beyond the anterior horn.

Click the image for a large version Neurons in those segments then convey the impulses outward beyond the cord.

In addition to the trophic influence exerted by each part of the neuron on its other parts, notably by the perikaryon on the cell branches, one neuron also in many instances influences the nutrition of other neurons.

Previous models have shown how the tilt aftereffect can be explained through adaptation of lateral interactions between neurons in visual maps.

Studies in salamanders and mice show that low extracellular calcium increases calcium signaling between neurons in the eye as well as in the nose.

Current clamp and voltage clamp experiments revealed multiple effects of 5-HT on the intrinsic excitability of CN neurons.

These are neurons that produce the chemical messenger dopamine.

Effectively, TMS utilizes an electromagnet to cause a very temporary disruption in the firing of neurons at the site of stimulation.

The picture on the cover shows a scanning electron micrograph of sensory neurons from the olfactory epithelium of an adult mouse.

It was early, I only had a few neurons firing, and they evidently hadn't got their act together yet.

In the early studies, stem cells were mainly found to have become support cells called glia, rather than new neurons.

Immunoreactivity within these neurons was diffuse, and finely granular or punctate.

The dentate gyrus of the hippocampal formation continues to generate new neurons well into adulthood.

Furthermore we will use intracellular current injection to manipulate the activity of descending neurons, to identify those interneurons that elicit significant changes.

We conclude that from their early functioning, synapses from sensory neurons are strong and from sensory pathway interneurons are weak.

Neurons close to the stimulating electrode become very leaky, but fire because of the strong depolarisation.

This explanation assumes that after recovery from polio the surviving giant motor neurons must labor more than normal neurons just to maintain daily activities.

These become the parent motor neurons for those muscle fibers that were orphaned initially.

These vastly enlarged motor units make it possible for fewer motor neurons to do the work of many.

One of his ideas was to define logical systems modeled on interconnected neurons.

Firstly, the inhibitory spinal neurons do not function correctly to ' switch off ' pain signals.

All of these values are taken from data specific to subthalamic projection neurons.

After a brief introduction to pyramidal neurons, I will cover some of the existing models of neuronal dynamics.

It is associated with progressive degeneration of dopaminergic neurons in specific areas in the brain.

Researchers have found that Ecstasy causes extensive damage to key brain cells, called dopamine neurons.

We are also attempting to enhance neurite outgrowth in adult neurons by genetic manipulation.

He's created an artificial retina that copies the function of a real one down to the firing of individual neurons.

This marker can be used to differentiate sensory neurons from adjacent spinal cord or sympathetic neurons.

Fitzgerald, M. and Fulton, B.P. (1992) The physiological properties of developing sensory neurons.

Pressure to the cement gland excites trigeminal sensory neurons.

The results of these studies suggest that a sensitization of primary nociceptive sensory neurons is responsible for this hyperalgesia.

The ventral horns are where motor neurons leave the spinal cord.

As dendrites form the predominant elements in neurons, so dendritic spines form the dominant component of many types of dendritic trees.

Here, the neuron terminal forms fine branches, which make a network of close contacts, called synapses, with other neurons.

These neurons form synapses with properties indistinguishable to primary cultured mouse neurons.

The rhythm depends on fast inhibitory synapses interconnecting the inhibitory neurons.

It has been urged that the neurons retract during sleep, and that thus at the synapses the gap between nerve cell and nerve cell becomes wider, or that the supporting cells expand between the nerve cells and tend to isolate the latter one from the other.

Normally, symptoms of fatigue would result from a reduction in cortical activation that would reduce the firing of putamen neurons.

Bone marrow could be reconstituted from cultured brain, and glial and neurons cells were obtained from bone marrow.

He 's created an artificial retina that copies the function of a real one down to the firing of individual neurons.

Activity dependent excitability changes of nociceptors and mechanoreceptors Sensory neurons of the dorsal root ganglion are functionally heterogeneous.

Substance P Nerves from nociceptors use this peptide to activate relay neurons in the spinal cord.

These neurons are involved in sensory processing in weakly electric fish.