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Axon terminals (also called terminal boutons, synaptic boutons, end-feet, or presynaptic terminals) are distal terminations of the branches of an axon. An axon, also called a nerve fiber, is a long, slender projection of a nerve cell that conducts electrical impulses called action potentials away from the neuron's cell body to transmit those ...
In cellular neuroscience, an axotomy (from axo- 'axon' and -tomy 'surgery') is the cutting or otherwise severing of an axon. This type of denervation is often used in experimental studies on neuronal physiology and neuronal death or survival as a method to better understand nervous system diseases.
Alcoholic polyneuropathy is a neurological disorder in which peripheral nerves throughout the body malfunction simultaneously.It is defined by axonal degeneration in neurons of both the sensory and motor systems and initially occurs at the distal ends of the longest axons in the body.
Hypertrophic condition causes neural stiffness and a demyelination of nerves in the peripheral nervous system, and atrophy causes the breakdown of axons and neural cell bodies. [1] In these disorders, a patient experiences progressive muscle atrophy and sensory neuropathy of the extremities .
Giant axonal neuropathy is a rare, autosomal recessive [1] neurological disorder that causes disorganization of neurofilaments. Neurofilaments form a structural framework that helps to define the shape and size of neurons and are essential for normal nerve function.
This condition was discovered in 1991 by Hahn et al., when they described two Chinese-Canadian siblings of the opposite sex. The male had difficulties releasing his grip, childhood-onset neuromyotonia and muscle stiffness, progressive motor neuropathy, finger cramping while and after writing, involuntary twitches of the finger, thigh and forearm muscles, foot drop-associated gait problems ...
The axonal initial segment (AIS) is a structurally and functionally separate microdomain of the axon. [ 6 ] [ 7 ] One function of the initial segment is to separate the main part of an axon from the rest of the neuron; another function is to help initiate action potentials. [ 8 ]
Acute motor axonal neuropathy (AMAN) is a variant of Guillain–Barré syndrome. It is characterized by acute paralysis and loss of reflexes without sensory loss. Pathologically , there is motor axonal degeneration with antibody-mediated attacks of motor nerves and nodes of Ranvier .