Sleep apnoea linked to higher Alzheimer's risk

Obstructive sleep apnoea (OSA) has for the first time been linked to increased amyloid deposits in the brains of healthy people with normal cognition.

US researchers set out to solve the chicken-and-egg conundrum of whether disturbed sleep contributes to Alzheimer’s disease or simply reflects changing brain pathology in people developing the disease.

In a study of 208 healthy people aged between 55 and 90, the researchers measured OSA severity against changes in biomarkers for amyloid beta in cerebrospinal fluid (CSF) and changes in amyloid deposits seen on PET scan over two