People are usually asked to report to the sleep center in the evening, around two hours before bedtime. After arriving at the sleep center, a sleep technologist may ask about your sleep habits and request that you fill out a questionnaire. Then you will be given some time to get comfortable. You will have a private room with your own bathroom. After you have had some time to settle in, a technician will attach sensors to your scalp, chest, legs, eyelids, and chin. You will also have a pulse oximeter attached to a finger. Additionally, you may be asked to wear a tube beneath your nose and a belt around your chest. These monitoring devices are designed to record body functions while still allowing you to move freely and naturally while you sleep.