Polysomnography (PSG) or sleep study is a test done to diagnose sleep disorders by recording brain waves and sleep patterns. PSG can also be useful to monitor response to treatment of sleep disorders and adjust treatment plan suitably.
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A young 24-year-old British woman has been battling Narcolepsy, a medical disorder that causes her to sleep the moment she begins laughing. Bella Kilmartin said she even almost drowned once in a swimming pool when she chuckled over a joke. Even though her condition cannot be treated, Bella has made a few lifestyle changes to manage it. , Health News, Times Now