OSA Treatment & Brain Health: Improve Memory & Alertness | Everyday Health

Treating obstructive sleep apnea (OSA) can yield rapid improvements in brain function, with many individuals experiencing enhanced daytime alertness, sharper cognitive skills, and strengthened long-term memory within weeks of initiating continuous positive airway pressure (CPAP) therapy, according to Dr. Joanna Fong-Isariyawongse, a sleep neurologist at UPMC Neurology and an associate professor of neurology at the University of Pittsburgh.

OSA, characterized by pauses or shallowing of breath during sleep due to relaxed throat muscles and reduced oxygen levels, forces the brain to repeatedly awaken to restore breathing—sometimes dozens of times per hour. These frequent interruptions disrupt deep sleep, leading to widespread and lasting effects on brain health. “Night after night, the brain is forced into survival mode instead of recovery mode,” Fong-Isariyawongse says. “Over time, this leads to real and measurable changes.”

Research indicates that individuals with OSA exhibit structural changes in the brain, including a smaller hippocampus—a region crucial for memory and learning—and a smaller precuneus, involved in memory and self-awareness. CPAP therapy, the most common treatment for OSA, delivers a steady stream of air through a mask to keep the airway open during sleep.

While CPAP is the most studied treatment, alternative approaches may also offer cognitive benefits. Oral appliances, or mouth guards, which reposition the lower jaw or tongue, can improve thinking speed and alertness in individuals with mild-to-moderate sleep apnea, Fong-Isariyawongse notes. The U.S. Food and Drug Administration recently approved the weight-loss medication tirzepatide (Zepbound) as a treatment for moderate-to-severe OSA, to be used in conjunction with exercise and dietary changes. The medication works by suppressing appetite and slowing digestion, potentially reducing OSA severity and supporting cognitive health.

Clinical trials suggest tirzepatide can reduce the number of sleep interruptions by as many as 29 per hour and improve overall sleep quality. “Weight loss, including through medications or surgery, often improves sleep apnea severity, though many patients still need additional treatment,” Fong-Isariyawongse says. Surgical interventions, including implanted nerve stimulation devices and airway clearance surgery, can also alleviate daytime sleepiness and its associated cognitive impairments in more advanced cases of OSA.

A recent cost-effectiveness analysis of CPAP treatment in European countries with tax-funded healthcare systems found that CPAP is cost-effective for individuals with severe or moderate OSA with symptoms, particularly middle-aged, overweight males. The study, published in PubMed, also highlighted opportunities to reduce CPAP treatment costs without compromising quality, such as utilizing home-based overnight polygraphy for diagnosis and implementing remote monitoring and follow-up care.

The American Academy of Sleep Medicine (AASM) offers a webinar series tailored for sleep medicine fellows, with the next session scheduled for February 11, 2026, focusing on central sleep apnea (CSA) and evidence-based diagnostic and treatment approaches.