Sleep Apnea Therapy May Tweak Brain Structure, Study Finds

Obstructive sleep apnea (OSA) can reshape the brain in several ways. Doctors usually treat it with continuous positive airway pressure therapy. But it isn’t clear if the brain changes seen on scans get better after using that therapy.

Researchers looked through three big medical databases up to the end of 2025. They picked studies that had adults with OSA who got brain scans before and after the therapy, or that compared them to people who didn’t get treatment. Those scans covered many types of MRI data, like structure, blood flow, and chemistry.

Out of 30 papers, the results were all over the place. Some showed thicker cortex, others showed better white‑matter pathways. Functional links between brain regions shifted, and blood flow in certain areas changed. Early signs of metabolic or vascular tweaks also appeared, but the evidence was thin.

Because most studies were small and not randomized, the picture is still fuzzy. The methods for scanning and analyzing the images varied a lot. So far, we can’t say the therapy reliably fixes brain scan signs, and routine scan checks for each patient aren’t justified. Future work should use larger, planned studies with the same imaging steps.