Author: Glossary
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Acute ascending myelitis
Myelitis that moves progressively upward in the spinal cord. A type of spinal cord inflammation that progresses upward towards the brain. It commonly appears as a symptom of poliomyelitis or diphtheria and can even arise from the toxic impact of tick bites. This condition is also known as Landry’s paralysis.
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Acute myelitis
Myelitis that develops rapidly, that is, in hours or days. Myelitis of rapid onset is more likely to be reversible than chronic or slowly developing inflammation of the spinal cord.
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Myelinosis
Fatty degeneration during which myelin is produced.
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Myelinopathy
Degeneration of the myelin sheaths of neurons, especially in the central nervous system.
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Myelencephalon
The most posterior portion of the embryonic hindbrain (rhombencephalon), which gives rise to the medulla oblongata.
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Myelalgia
Pain in the spinal cord or its membranes.
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Spinal mydriasis
Mydriasis resulting from irritation of, or a lesion in, the ciliospinal center of spinal cord.
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Spastic mydriasis
Mydriasis resulting from overactivity of the dilator muscle of the iris or of sympathetic nerves supplying that muscle.
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Paralytic mydriasis
Mydriasis resulting from paralysis of the oculomotor nerve.
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Alternating mydriasis
Mydriasis that affects one eye, then the other.