1. Narcolepsy exhibits a reduced REM latency. T or F
ANSWER
1. True
Narcolepsy: depletion of hypocretin secreting neurons in lateral hypothalamus that are involved in maintaining wakefulness
Diagnostic: recurrent lapses into sleep or napping several times in the same day, >3 times a week for >3mo. and at least 1 of the following
-Cataplexy: Conscious of bilateral loss of muscle tone precipitated by emotions or abnormal facial movement (without emotional triggers)
-Hypocretin - 1 (orexin A) deficiency in CSF
- REM sleep latency <15 minutes
Tetrad:
-Sleep attacks
-Cataplexy
-Hypnagogic or hypnopompic hallucinations
-Sleep paralysis
Dx: Shortened REM sleep latency on polysomnografy
Low levels of hypocretin 1 in CSF
You may feel weak, you may fall down, say no to Cataplexy, say yes to CATA GETUP!!
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