Advanced sleep phase disorder is a rare condition that causes your natural circadian rhythm, or sleep-wake cycle, to occur earlier than typical. As humans, our sleep-wake cycle— also known as our ...

Non-24-hour sleep-wake disorder (N24SWD) occurs when your sleep-wake cycle gradually shifts out of sync with the 24-hour day. It affects about half of blind people, but it can also affect those with ...

Bipolar disorder disrupts sleep patterns, and sleep challenges worsen bipolar symptoms. Prioritizing better rest can help ...

SEATTLE — It’s easy for some to get a good night’s sleep, but for many others, it can be a nightly challenge. The Sleep Medicine program at Overlake Medical Center provides services and treatments for ...

Idiopathic hypersomnia (IH) is a rare sleep disorder that causes extreme tiredness during the day for no clear reason. The word “idiopathic” means there’s no known cause, and “hypersomnia” means ...

OSA is a common sleep disorder characterized by oxygen desaturation due to repeated airway collapse during sleep.