Jupiterimages/Brand X Pictures/Getty Images. Panic is a natural reaction when you're served with a subpoena, but as far as legal documents are concerned, a subpoena duces tecum is one of the more innocuous ones you can encounter.
Circadian rhythms are biological oscillations that recur with a period of approximately one day. Health issues related to circadian rhythms include jet lag, shift work, seasonal depression, and time-of-day variations in response to medical treatments.
Circadian Rhythm Sleep Disorders. Circadian rhythms are what regulate our natural sleep and wake patterns. Learn more about circadian rhythm sleep disorders and what treatment options are available. Circadian Rhythm Sleep Disorders. Delayed Phase Sleep Disorder. Non-24 Sleep Wake Disorder.