axon


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Related to axon: Dendrites

axon:

see nervous systemnervous system,
network of specialized tissue that controls actions and reactions of the body and its adjustment to the environment. Virtually all members of the animal kingdom have at least a rudimentary nervous system.
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; synapsesynapse
, junction between various signal-transmitter cells, either between two neurons or between a neuron and a muscle or gland. A nerve impulse reaches the synapse through the axon, or transmitting end, of a nerve cell, or neuron.
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Axon

 

a neurite, or axis cylinder; the process of a nerve cell along which neural impulses proceed from the cell body to innervated organs and other nerve cells.

Only one axon branches off each neuron, or nerve cell. The nutrition and growth of the axon depends on the neuron body; upon transection of the axon, its peripheral portion dies, but the central portion preserves its viability. Large animals possess axons—for example, those proceeding from the spinal cord to the extremities—that may reach a length of one meter or more when their diameter is several millimicrons (mμ). In some animals—for example, squid and fish—huge axons are found which measure hundreds of mμ in thickness. In axoplasm—that is, the protoplasm of axons—there are extremely thin fibrils, known as neurofibrils, as well as mitochondria and the endoplasmic network. Depending on whether axons are covered with a myelic (fatty) membrane or not, they are known as medullated or nonmedullated nerve fibers. The structure of the membranes and the diameters of the axons that constitute the nerve fiber are the factors that determine the rate of stimulus transmission along the nerve. The terminal sections of the axon, or terminals, branch off and make contact with other nerve, muscle, and gland cells. Stimuli are transmitted through these contact points, which are known as synapses. A nerve is a collection of axons.

axon

[′ak‚sän]
(neuroscience)
The process or nerve fiber of a neuron that carries the unidirectional nerve impulse away from the cell body. Also known as neuraxon; neurite.
References in periodicals archive ?
Charlottesville Police Department (VA): 100 Axon Body and Flex cameras with five years of Evidence.
First unveiled in July 2015, ZTE s AXON mini became the world s first smartphone to come with a pressure-sensitive touch screen that recognizes different levels of touch pressure for enhanced functions and experience, such as interactive gaming, passwords and more.
Severed invertebrate nerve axons can reconnect proximal and distal ends of severed nerve axons within seven days, allowing a rate of behavioral recovery that is far superior to mammals," said Bittner.
Axon, a builder and joiner who also does music gigs, owns three properties.
More specifically, we identified Flk-1 as the receptor responsible for this effect, making it a prime target for the development of therapies to re-grow axons after lesions of the central nervous system or neurodegenerative diseases," he stated.
It remains unknown whether or not axons carry receptors for other chemical messengers, such as dopamine and serotonin.
The MoD said the decision to recall Axon was taken because it was 'in the interests of all the people concerned'.
Neurotrophic factors provide necessary nutrients to sustain the axon (Huber, Kolodkin, Ginty, & Cloutier, 2003; Koleske, 2003; Song et al.
We found demyelination with axon sparing in our patients, which is indicative of a primary active disease process.
When an axon is damaged, the sodium channel genes that should be turned on are turned off, and those that should be turned off, turn on.
Though Valtech already had an office in Sweden, merging Axon into its operation there will accelerate its growth in the Scandinavian market as a whole, said Forsling.
24, 2015 /PRNewswire/ -- TASER International (NASDAQ: TASR), the global leader in body-worn cameras and digital evidence management tools for law enforcement, today announced the selection of the Axon body-worn video platform by the London Metropolitan Police Service.