Memory impairment is a known symptom of obstructive sleep apnea. Researchers have published a study that shows an improvement in memory by application of positive airway pressure therapy (CPAP). Fifty eight patients were divided into three groups based on usage of CPAP. Group 1 use CPAP less than 2 hours per night, Group 2: 2-6 hours per night and Group 3 more than 6 hours per night. After 3 months, patients in group 3 were 8 times more likely to have normal memory function as compared to Group 1. Most people consider memory loss as a side effect of getting old. However, sleep apnea is a reversible and easily treated cause of memory loss. This shows the importance of adhering to treatment.

Zimmerman et al. Chest 2006; 130:1772-1778

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