+Cataplexy is a sudden, brief loss of [Muscle Tone](/wiki/muscle-tone), often triggered by strong [Emotion](/wiki/emotion) like laughter or anger. This temporary weakness, from slight buckling to complete collapse, is a defining symptom of [Narcolepsy](/wiki/narcolepsy), where consciousness remains intact.
+## See also
+- [Narcolepsy](/wiki/narcolepsy)
+- [Sleep Disorder](/wiki/sleep-disorder)
+- [REM Sleep](/wiki/rem-sleep)
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