What is the meaning of Narcolepsy

This is an inappropriate attack of sleep, the affected person has an overwhelming impulse to fall asleep or simply collapses into sleep at inconvenient times. Attacks may be infrequent or may occur many times a day. Narcolepsy disorders are surprisingly common. The estimates suggest that as much as 0.02% of the population may suffer from them. Males and females seem equally affected. The narcolepsies include

1) sleep attacks,

2) cataplexy,

3) sleep paralysis, and

4) hypnagogic hallucinations.

Although all these disorders do not generally exist at the same time or in the same person, they are present together often enough to be considered interrelated.