SYDNEY: A sleep disorder that causes repeated shallow or interrupted breathing may be associated with changes in brain structure that are also observed in the early stages of dementia.
Obstructive sleep apnea (OSA), common in the elderly, is a condition where the walls of the throat relax and contract during sleep, stopping breathing, and are known to reduce levels. oxygen in the blood. It has also been linked to heart disease, stroke and cancer.
The new study suggests that the decline in oxygen may be related to a narrowing of the temporal lobes of the brain and a corresponding decline in memory.
"Between 30% and 50% of the risk of dementia is due to modifiable factors such as depression, high blood pressure, obesity and smoking In recent years, researchers have recognized that various disorders of Sleep are also risk factors for dementia, "said lead author Sharon Naismith of the University of Sydney, Australia.
"We wanted to specifically look at obstructive sleep apnea and its effects on the brain and cognitive abilities," added Naismith.