**3. Are you sure your patient has a circadian rhythm sleep-wake disorder? What should you expect to find?**

Circadian rhythm disorders can result in clinically significant symptoms of insomnia, excessive daytime sleepiness, and cognitive impairment. In addition, a drastic misalignment of one's circadian clock with societal norms can often have implications for one's emotional well-being and social functioning. There are 6 major categories of circadian rhythm sleep–wake disorders which are grouped based on patterns of sleep time:
