-plexia, -plexias, -plexies, -plexy, -plectic, -plexic +
(Greek: stroke, wound; used in medicine to denote "a condition resulting from a stroke")
2. Sudden impairment of neurological function, especially that resulting from a cerebral hemorrhage; a stroke.
3. Any acute clinical event, related to impairment of cerebral circulation, which lasts longer then twenty-four hours; brain attack.
4. A sudden effusion of blood into an organ or tissue.
5. A fit of extreme anger; rage.
6. Etymology: apoplexy comes from the Greek apoplexia, "a seizure", in the sense of being struck down.
In Greek plexe is "a stroke". The ancients believed that anyone suffering a stroke; or any sudden incapacity, had been struck down by the gods.
A "sudden fit of paralysis and dizziness", from Old French apoplexie or directly from Late Latin apoplexia; from apo-, "off" + plessein, "hit".
When such collapsing results, people with cataplexy may injure themselves.
Laughter and other emotions trigger a reflex in people which can bring many of the muscles of the body to the point of collapse.
The phenomenon can be measured by sending electric signals through the muscles and gauging their response. In cataplexy, what is known as the H-reflex, a neurological pathway that causes muscle contractions, virtually disappears.
Cataplexy often happens to people who have narcolepsy, a disorder in which there is great difficulty remaining awake during the daytime.The word cataplexy comes from the Greek kata, meaning "down" + plexis, meaning "a stroke" or "seizure" or "a falling-down seizure".
Tetanic contractions refers to the fusion of a number of simple spasms into an apparently smooth, continuous effort.
A plexus is an interlacing network, as of nerves, blood vessels, or lymphatic vessels.
There may also be gastrointestinal effects including vomiting and nausea; cardiovascular effects; neurological effects; such as, headaches and malaise; and irritation of the eyes.