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Sigma KEE - Narcolepsy

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Narcolepsy

Narcolepsy is a long-term neurological disorder that involves a decreased ability to regulate sleep-wake cycles. Symptoms often include periods of excessive daytime sleepiness and brief involuntary sleep episodes. About 70% of those affected also experience episodes of sudden loss of muscle strength, known as cataplexy. These experiences can be brought on by strong emotions. Less commonly, there may be vivid hallucinations or an inability to move (sleep paralysis) while falling asleep or waking up. People with narcolepsy tend to sleep about the same number of hours per day as people without, but the quality of sleep tends to be lessened. [from Wikipedia]

Relationships
Instances	Abstract	Properties or qualities as distinguished from any particular embodiment of the properties/qualities in a physical medium. Instances of Abstract can be said to exist in the same sense as mathematical objects such as sets and relations, but they cannot exist at a particular place and time without some physical encoding or embodiment.
	Attribute	Qualities which we cannot or choose not to reify into subclasses of.
	BiologicalAttribute	Attributes that apply specifically to instances of OrganicObject (Organism or AnatomicalStructure).
	DiseaseOrSyndrome	A BiologicalAttribute which qualifies something that alters or interferes with a normal process, state or activity of an Organism. It is usually characterized by the abnormal functioning of one or more of the host's systems, parts, or Organs.
	Entity	The universal class of individuals. This is the root node of the ontology.
	InternalAttribute	Any Attribute of an Entity that is an internal property of the Entity, e.g. its shape, its color, its fragility, etc.
Belongs to Class	Entity

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