<prompt> Sleep apnea syndromeFor above situations, select the most likely sleep disturbance.sleep more than younger adultsincreased arousals during the nightincreased slow-wave sleepmost common cause of excessive daytime sleepiness in the elderly  <response>: Sleep apnea syndrome is the most common cause of daytime sleepiness in the elderly. The prevalence at least in sleep disorder centers increases with advancing age. Narcolepsy usually having started earlier in life and periodic limb movement disorder restless legs are other common causes of excessive daytime sleepiness. 