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cataplexy

   Also found in: Medical, Encyclopedia, Wikipedia, Hutchinson 0.03 sec.
cat·a·plex·y  (kt-plks)
n. pl. cat·a·plex·ies
A sudden loss of muscle tone and strength, usually caused by an extreme emotional stimulus.

[From Greek kataplxis, fixation (of the eyes), from kataplssein, to astound, terrify : kata-, intensive pref.; see cata- + plssein, plk-, to strike; see plk-2 in Indo-European roots.]

cata·plectic (-plktk) adj.

cataplexy [ˈkætəˌplɛksɪ]
n
1. (Medicine / Pathology) sudden temporary paralysis, brought on by severe shock
2. (Life Sciences & Allied Applications / Zoology) a state of complete absence of movement assumed by animals while shamming death
[from Greek kataplēxis amazement, from kataplēssein to strike down (with amazement), confound, from kata- down + plēssein to strike]
cataplectic  adj

cataplexy
a temporary paralytic or hypnotic state, often brought on by strong emotion. — cataplectic, adj.
See also: Nerves


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? Mentioned in ? References in periodicals archive
 
Cataplexy often occurs in response to strong emotions, such as surprise, anguish, or elation.
Even if clear-cut narcolepsy is present, per an incontrovertible history of cataplexy, overnight sleep laboratory monitoring usually still is warranted, due to the high prevalence of sleep apnea: even as an aggravating factor that could render treatment for narcolepsy less efficacious.
Xyrem has demonstrated an acceptable safety profile in narcoleptics with cataplexy when administered in nightly divided doses of 6 to 9 g with a recommended starting dose of 4.
 
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