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The peripheral nerves
The peripheral nerves

... *nerve fiber regeneration starts by growing of proximal neurilemma tube till its cut ends. Then, it sprouts into several branches , at the same time the distal part grows towards sprouting neurofibrils by chemotaxis secreted by schwann cells. *The myelin sheath is regenerated by neurilemmal cells *s ...
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... • Secretion – nerve endings secret neurotransmitters, that stimulates other cells. ...
4-Nervous system I: Structure and organization
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... Q: What is the nervous system? A network of billions of nerve cells linked together in a highly organized fashion to form the rapid control center of the body In the brain, roughly 100 billion (1011) neurons and 100 trillion (1014) synapses (connections between nerve cells) ...
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... 3 To act upon the information, usually by coordinating the organism’s activities. ...
How the Nervous System Works
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Nervous System Vocab1 - Everglades High School
Nervous System Vocab1 - Everglades High School

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chapter the nervous system and the effects of drugs
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A1984SR69800001

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Neuroregeneration

Neuroregeneration refers to the regrowth or repair of nervous tissues, cells or cell products. Such mechanisms may include generation of new neurons, glia, axons, myelin, or synapses. Neuroregeneration differs between the peripheral nervous system (PNS) and the central nervous system (CNS) by the functional mechanisms and especially the extent and speed. When an axon is damaged, the distal segment undergoes Wallerian degeneration, losing its myelin sheath. The proximal segment can either die by apoptosis or undergo the chromatolytic reaction, which is an attempt at repair. In the CNS, synaptic stripping occurs as glial foot processes invade the dead synapse.Nervous system injuries affect over 90,000 people every year. It is estimated that spinal cord injuries alone affect 10,000 each year. As a result of this high incidence of neurological injuries, nerve regeneration and repair, a subfield of neural tissue engineering, is becoming a rapidly growing field dedicated to the discovery of new ways to recover nerve functionality after injury. The nervous system is divided into two parts: the central nervous system, which consists of the brain and spinal cord, and the peripheral nervous system, which consists of cranial and spinal nerves along with their associated ganglia. While the peripheral nervous system has an intrinsic ability for repair and regeneration, the central nervous system is, for the most part, incapable of self-repair and regeneration. There is currently no treatment for recovering human nerve function after injury to the central nervous system. In addition, multiple attempts at nerve re-growth across the PNS-CNS transition have not been successful. There is simply not enough knowledge about regeneration in the central nervous system. In addition, although the peripheral nervous system has the capability for regeneration, much research still needs to be done to optimize the environment for maximum regrowth potential. Neuroregeneration is important clinically, as it is part of the pathogenesis of many diseases, including multiple sclerosis.
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