Sleep apnea is a disorder whereby you stop breathing during sleep. Apnea can be due to an interruption in the brain signals that drive unconscious breathing (this is Central Apnea) or because your airway collapses as you sleep (this is Obstructive Apnea). Most people are not aware of the interruptions or disturbances in sleep that come with sleep apnea. Many however, will experience hundreds of these interruptions each night.