The article by Guilleminault et al. (1993) investigates a group of patients with chronic daytime sleepiness, who are often classified as having "idiopathic hypersomnias." The study focuses on a subgroup of these patients who exhibit short, transient alpha EEG arousals during sleep, which are typically ignored in sleep analyses but have a significant impact on sleep quality. These arousals are associated with increased respiratory efforts and upper airway resistance during sleep. The authors found that these patients had mild abnormalities in their upper airway anatomy and that continuous positive airway pressure (CPAP) therapy significantly reduced the number of arousals, improved sleep structure, and eliminated daytime sleepiness. The study suggests that recognizing and treating this condition, known as the "upper airway resistance syndrome," can effectively manage excessive daytime sleepiness.The article by Guilleminault et al. (1993) investigates a group of patients with chronic daytime sleepiness, who are often classified as having "idiopathic hypersomnias." The study focuses on a subgroup of these patients who exhibit short, transient alpha EEG arousals during sleep, which are typically ignored in sleep analyses but have a significant impact on sleep quality. These arousals are associated with increased respiratory efforts and upper airway resistance during sleep. The authors found that these patients had mild abnormalities in their upper airway anatomy and that continuous positive airway pressure (CPAP) therapy significantly reduced the number of arousals, improved sleep structure, and eliminated daytime sleepiness. The study suggests that recognizing and treating this condition, known as the "upper airway resistance syndrome," can effectively manage excessive daytime sleepiness.