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.
It's your own biological clock called your circadian rhythm. Coming from two Latin words: Circa, meaning 'approximately' and dies, meaning 'day,' this 'clock' regulates your sleeping pattern over the course of a 24-hour day. The circadian rhythm is mostly comprised of a group of cells called the suprachiasmatic nucleus (SCN), which is located in the hypothalamus.