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No references found	Since Gelineau's initial description, the definition of narcolepsy has changed slightly to encompass these four symptoms: excessive sleepiness and/or uncontrolled episodes of overwhelming sleepiness (often called "sleep attacks"); hypnagogic hallucinations (realistic imagery occurring with the onset of sleep); sleep paralysis (inability to move just as one is awakening or going to sleep); and cataplexy (sudden, brief loss of muscle tone triggered by strong emotions). Narcolepsy and neurotransmitters by Patrick, Regina / FOCUS: Journal for Respiratory Care & Sleep Medicine It appears at the onset of sleep and acts as a transition stage into Stage 2: This stage can be associated with hypnagogic hallucinations (dreamlike images, sounds or sometimes smells before falling asleep or waking up), a loss of muscle tone, and a conscious awareness of the external environment. The Mysterious World of Sleep by Tim Pollack / Food/cooking/nutrition community Daytime sleepiness, sleep paralysis, and hypnagogic hallucinations also occur in people who do not have Narcolepsy, more frequently in people who are suffering from extreme lack of sleep. The Cause and Symptoms of Narcolepsy by Heather Colman / Health care industry community	hypervolume hyperware Hyperwave Information Server hypesthesia hypethral hypha Hyphaene Hyphen hyphen ladder hyphenation hyphenation dictionary hyphenation zone Hyphessobricon hyphidium Hyphochytriales Hyphochytridiomycetes hyphoid Hypholoma Fasciculare Hyphomicrobiaceae Hyphomicrobiales Hyphomicrobium Hyphomonas Hyphomycetes hyphopodium hypidiomorphic hypnagogic hallucination hypnale asp hypnic myoclonia Hypnineae hypnoanalysis Hypnobryales hypnophobia Hypnos Hypnosis hypnotherapy Hypnotic hypnotic drugs hypnotism hypnotize hypnotoxin hypo hypo eliminator hypo test hypoadrenalism hypoadrenia hypoadrenocorticism hypoalbuminemia hypoallergenic hypobaric hypobasal hypobasis	hyphoid Hypholoma fasciculare Hypholoma fasciculare Hyphomicrobiaceae Hyphomicrobiales Hyphomicrobium Hyphomonas Hyphomyces destruens Hyphomycetes Hyphomycetes Hyphomycetes hyphomycosis Hyphon Hyphon hyphopodium HYPI Hypidiomorphic Hypidiomorphic hyping hyping hyping Hypinosis hypn(o)- hypn- hypn- Hypnagogia Hypnagogia Hypnagogia hypnagogic hypnagogic hypnagogic hallucination Hypnagogic hallucinations hypnagogic image Hypnagogic imagery hypnagogic jerks Hypnagogic myoclonus Hypnagogic myoclonus Hypnagogic myoclonus Hypnagogic paralysis Hypnagogic paralysis hypnagogic startle hypnagogue hypnagogue hypnale asp hypnalgia hypnapagogic Hypnapompic paralysis Hypnapompic paralysis Hypnerpeton hypnesthesia hypnic hypnic myoclonia Hypnineae hypno hypno- hypno- Hypno-Peripheral Processing hypnoanalyses hypnoanalyses hypnoanalyses hypnoanalysis

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Since Gelineau's initial description, the definition of narcolepsy has changed slightly to encompass these four symptoms: excessive sleepiness and/or uncontrolled episodes of overwhelming sleepiness (often called "sleep attacks"); hypnagogic hallucinations (realistic imagery occurring with the onset of sleep); sleep paralysis (inability to move just as one is awakening or going to sleep); and cataplexy (sudden, brief loss of muscle tone triggered by strong emotions).

Narcolepsy and neurotransmitters by Patrick, Regina / FOCUS: Journal for Respiratory Care & Sleep Medicine

It appears at the onset of sleep and acts as a transition stage into Stage 2: This stage can be associated with hypnagogic hallucinations (dreamlike images, sounds or sometimes smells before falling asleep or waking up), a loss of muscle tone, and a conscious awareness of the external environment.

The Mysterious World of Sleep by Tim Pollack / Food/cooking/nutrition community

Daytime sleepiness, sleep paralysis, and hypnagogic hallucinations also occur in people who do not have Narcolepsy, more frequently in people who are suffering from extreme lack of sleep.

The Cause and Symptoms of Narcolepsy by Heather Colman / Health care industry community