'Sleep Apnea' is demonstrated as the usual sleep disorder that involves small disturbances during the sleep due to repeated interruption(stopping or starting) of breathing during sleep. Such a disorder leads to snoring, excessive sleepiness during daytime and lack of soundness in sleep. It primarily causes mainly due to obstruction in airway and signalling issue in the brain.
As per the question, the symptoms like 'waking up dozen times during the sleep which may be due to blocking of airway that constantly interrupts breathing process during sleep' implies that the roommate is probably experiencing 'Sleep Apnea'. Such a disorder may lead to problem of reduced concentration ability, distressed and depressed mental state, problem in memorizing, and even the decision-making abilities.
