Sleep studies, also known as polysomnography, are tests that monitor various body functions during sleep. They typically measure brain activity, eye movements, heart rate, and breathing patterns. These studies help diagnose sleep disorders such as sleep apnea, insomnia, and narcolepsy. During a sleep study, patients usually spend the night in a sleep clinic or hospital. Sensors are placed on the body to collect data while the patient sleeps. The information gathered helps doctors understand sleep patterns and identify any abnormalities, leading to appropriate treatment options for better sleep health.