[DOC] [TLE] Narcolepsy Fact Sheet - National Institute of Neurological Disorders ... [PAR] Apr 6, 2016 ... These sleep attacks usually last a few seconds to several minutes. ... cataplexy (
a sudden loss of voluntary muscle tone while awake that makes a .... Although 
the reason for such cell loss remains unknown, it appears to be... [DOC] [TLE] Narcolepsy - Wikipedia [PAR] This ICSD version defines narcolepsy as a disorder of unknown etiology that is characterized by excessive sleepiness that typically is associated with cataplexy and other REM-sleep phenomena, such as sleep paralysis and hypnagogic hallucinations". ... A "complaint of excessive sleepiness or sudden muscle weakness." [DOC] [TLE] What is narcolepsy, symptoms & causes - WebMD [PAR] Narcolepsy is a neurological disorder that affects the control of sleep and ... 
These sudden sleep attacks may occur during any type of activity at any time of 
the day. ... The cause of narcolepsy is not known; however, scientists have made
... [DOC] [TLE] Narcolepsy - Wake Forest Baptist, North Carolina [PAR] Sep 6, 2016 ... The cause of narcolepsy is unknown. This disorder is characterized by excessive sleepiness that is typically associated with cataplexy, a sudden loss of muscle tone and paralysis of voluntary muscles that is associated with a strong emotion. [DOC] [TLE] Narcolepsy - NORD (National Organization for Rare Disorders) [PAR] Three additional symptoms often associated with narcolepsy are sudden ... Why 
the immune system attacks healthy cells in narcolepsy is unknown and .... The 
exact cause of narcolepsy without cataplexy is unknown. ... Kleine-Levin 
syndrome is a rare disorder characterized by the need for excessive amounts of 
sleep... [DOC] [TLE] Nacrolepsy | definition of Nacrolepsy by Medical dictionary [PAR] Persistent sleepiness and sleep attacks are the hallmarks of this condition. .... A 
disorder characterized by sudden and uncontrollable, though often brief, attacks 
of ... Its cause is unknown, and it is not related to pathological lesions in the brain. [DOC] [TLE] What is Narcolepsy? (NINDS) - American Sleep Association [PAR] Narcolepsy is a chronic neurological disorder caused by the brain's inability to ... 
or the sudden loss of voluntary muscle tone; vivid hallucinations during sleep 
onset or upon ... Restless legs syndrome is a neurological disorder characterized 
by ... Attacks can occur at any time during the waking period, with patients usually
... [DOC] [TLE] Narcolepsy and Other Hypersomnias - CGH Medical Center [PAR] Narcolepsy is a chronic, neurological sleep disorder characterized by ... sleep 
and with epilepsy because of unexplained sudden falls caused by cataplexy. ... 
However, if sleep attacks are isolated and there is only mild or no cataplexy, 
making a ... be due to a brain abnormality of unknown cause; for example, some 
subjects... [DOC] [TLE] Comprehensive Sleep Care Center | Sleep Disorders [PAR] The term sleep disorders can refer to a wide variety of disorders that either ... 
We're all more than familiar what snoring sounds like  but what causes it? .... 
Narcolepsy is a chronic sleep disorder characterized by overwhelming daytime 
drowsiness and sudden attacks of .... In most cases, the cause of RLS is unknown
. [DOC] [TLE] Sleep Disorders facts, information, pictures | Encyclopedia.com ... [PAR] Sleep disorders are classified based on what causes them. ... the number of 
these adults who are experiencing true primary insomnia is unknown. ... 
Narcolepsy is a dyssomnia characterized by recurrent "sleep attacks" that the 
patient cannot fight. ... Cataplexy is the sudden loss of muscle tone and stability ("
drop attacks"). [DOC] [TLE] Narcolepsy Overview and Facts - Sleep Education [PAR] Narcolepsy is a sleep disorder that makes you feel overwhelmingly sleepy, and 
have ... The cause of narcolepsy is still unknown, but recent research suggests 
that ... Cataplexy is when you have attacks that cause a sudden loss of muscle 
tone... [DOC] [TLE] Sleep Medicine Services Narcolepsy and Hypersomnias (Excessive ... [PAR] Narcolepsy is a disorder characterized by excessive daytime sleepiness in 
addition to other symptoms such as ... Sudden and often irresistible sleep attacks 
(that is, a sudden onset of sleep or involuntary sleep .... The cause is still 
unknown. [DOC] [TLE] Sleep - Sleep Disorders - Narcolepsy [PAR] Narcolepsy - part of a website about sleep, sleep patterns

Question: The cause of this disorder characterized by sudden sleep attacks is unknown
Answer: Narcolepsy