It occurs when the brain fails to signal the muscles that control breathing. Obstructive sleep apnea is the most common type, and occurs when the soft tissue in the throat relaxes during sleep, and blocks the airway. (Smith, Robinson, Segal 1). Usually the airway is blocked because the tonsils and adenoids are large. (Gulli 1). Complex sleep apnea is a combination of central and obstructive. (Smith, Robinson, Segal 1). If one is suffering with sleep apnea, they can stop breathing up to one hundred times during the night. They have no idea they struggled for breath. (Dean 1). When fighting sleep apnea in the night, the person’s body goes into “flight or fight” mode. (Boyles 1). Yale researcher Nadar Bostros says “That (it) does a number on your sympathetic nervous system, it is as if you were waked at night because a saber tooth tiger was chasing you.” (Qtd. In Boyles 1). While sleeping the body is starved of oxygen, which can be dangerous. (Dean 1). “As airflow stops during an apnea episode, the oxygen levels in your blood drops. Your brain responds by briefly