Narcolepsy affects about 1 in 2,000 people. It is a chronic neurological disorder that is thought to be genetic. If a person is narcoleptic, their brain is not able to go through the proper stages of dozing and deep sleep. Instead, it falls directly in to REM (rapid eye movement) sleep. A narcoleptic person can suffer from any of the following; cataplexy (loss of muscle control, often triggered by emotions), hallucinations, sleep paralysis, nigh-time wakefulness, rapid entry into REM sleep. Symptoms of narcolepsy usually begin around age 10 - 25.