Sleep Center A good night's sleep is important to our well-being, providing essential physical and mental restoration. Although many take sleep for granted, an estimated 30% of the adult population suffers from sleep-related disorders. If you suffer from one of 84 various sleep disorders, you may need a sleep study. This study, called a polysomnogram, identifies different sleep stages and classifies various sleep disorders. The Sleep Disorders Center of Community Howard Specialty Hospital is here to help you identify and overcome your sleep problems.