There will be little to no discomfort caused by the sleep study. Small surface electrodes will be pasted to your scalp, chest and legs. Other equipment that will be attached to your body will include a finger probe, respiratory bands on your chest and abdomen, and an airflow sensor under your nose. You will be observed all night by a technician via infrared video and intercom system. The overnight sleep study will last 6-7 hours, beginning between 9:00 -11:00 PM and ending between 5:00 – 6:00 AM. You will need to makearrangements to leave the lab no later than 6:00 AM. The daytime sleep study will last 6-8 hours, beginning between 8:00 – 9:00 AM and ending between 4:00 – 5:00 PM. You will need to make arrangements to leave the lab no later than 5:00 PM.