convulsion


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convulsion,

sudden, violent, involuntary contraction of the muscles of the body, often accompanied by loss of consciousness. It is not known what causes the abnormal impulses from the brain that result in convulsive seizures, since the disturbance may arise in normal brain tissue as well as in diseased or injured tissue. Convulsions may occur in such conditions as epilepsy, poisoning, high fever (especially in young children), disturbances of calcium or phosphorus metabolism, alkalosis, diabetes, oxygen insufficiency, and a low blood-sugar content, as well as in local irritation or injury of the brain. Persons undergoing convulsions should be guarded against self-injury (see epilepsyepilepsy,
a chronic disorder of cerebral function characterized by periodic convulsive seizures. There are many conditions that have epileptic seizures. Sudden discharge of excess electrical activity, which can be either generalized (involving many areas of cells in the brain)
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). Otherwise, treatment must be directed to the underlying cause.

convulsion

[kən′vəl·shən]
(medicine)
An episode of involuntary, generally violent muscular contractions, rhythmically alternated with periods of relaxation; associated with many systematic and neurological diseases.

convulsion

a violent involuntary contraction of a muscle or muscles
References in classic literature ?
On the other hand, the symptoms may be much more violent, and cause me to fall into fearful convulsions, foam at the mouth, and cry out loudly.
and finally went off into a rollicking convulsion of the jolliest laughter that could be imagined.
The surface seemed very much broken as though by a convulsion of nature.
She raised her large, staring eyes to the magistrate, and replied, as though mechanically, without convulsion or agitation,--
The deathlike pallor, and a sort of slight convulsion about the lips, had not left Rogojin's face.
I saw the old man throw up his arms, a terrible convulsion passed over his grim face, and he fell back in his chair.
For several minutes the two lay thus, and then a sudden convulsion of the giant carcass at the man's side, a tremor, and a stiffening brought Tarzan to his knees beside the crocodile.
The fact of Tackleton having walked out; and furthermore, of two or three people having been talking together at a distance, for two minutes, leaving her to her own resources; was quite enough to have put her on her dignity, and the bewailment of that mysterious convulsion in the Indigo trade, for four-and-twenty hours.
An interior convulsion, producing a distortion of the
A slight but continuous convulsion appeared to have possession of it.
We may imagine that stream of white lava had flowed from many parts of the mountain into the lower country, and that when solidified they had bee rent by some enormous convulsion into myriads of fragments.
William Gilpin, who is so admirable in all that relates to landscapes, and usually so correct, standing at the head of Loch Fyne, in Scotland, which he describes as "a bay of salt water, sixty or seventy fathoms deep, four miles in breadth," and about fifty miles long, surrounded by mountains, observes, "If we could have seen it immediately after the diluvian crash, or whatever convulsion of nature occasioned it, before the waters gushed in, what a horrid chasm must it have appeared!