Get inspired by a weekly roundup on living well, made simple. Sign up for CNN’s Life, But Better newsletter for information and tools designed to improve your well-being. Matthew Horsnell began ...

Narcolepsy can lead to excessive daytime sleepiness, as well as cataplexy, a sudden loss of muscle tone. Other symptoms can include sleep paralysis and hallucinations that occur both during sleep ...

Narcolepsy is caused by a deficiency of orexin, a brain chemical that regulates wakefulness and REM sleep. The MSLT and polysomnography are gold standards for diagnosing narcolepsy. Medications like ...

Horsnell has other common signs of narcolepsy as well, including nightmares and visual and tactile hypnagogic hallucinations, which occur while a person is falling asleep. Typically manifesting as ...

(CNN) — Matthew Horsnell began falling asleep for no reason when he was in sixth grade. “I would go to bed at 8:30 at night, yet every morning I would wake up and struggle to get out of bed,” said ...