Improving deep sleep may prevent dementia

Shutterstock_1978804178
The researchers found, on average, that the amount of deep sleep declined between the two studies, indicating slow wave sleep loss with ageing. [Source: Shutterstock]

As little as a 1% reduction in deep sleep per year for people over 60 years of age translates into a 27% increased risk of dementia, according to a Monash study which suggests that enhancing or maintaining deep sleep, also known as slow wave sleep, in older years could stave off dementia.

The study, led by Associate Professor Matthew Pase, from the Monash School of Psychological Sciences and the Turner Institute for Brain and Mental Health in Melbourne, Australia, and published today in JAMA Neurology, looked at 346 participants, over 60 years of age, enrolled in the Framingham Heart Study who completed two overnight sleep studies in the time periods 1995 to 1998 and 2001 to 2003, with an average of five years between the two studies.

These participants were then carefully followed for dementia from the time of the second sleep study through to 2018. The researchers found, on average, that the amount of deep sleep declined between the two studies, indicating slow wave sleep loss with ageing.

 

Even adjusting for age, sex, cohort, genetic factors, smoking status, sleeping medication use, antidepressant use, and anxiolytic use, each percentage decrease in deep sleep each year was associated with a 27 per cent increase in the risk of dementia.

“Slow-wave sleep, or deep sleep, supports the ageing brain in many ways, and we know that sleep augments the clearance of metabolic waste from the brain, including facilitating the clearance of proteins that aggregate in Alzheimer’s disease,” Associate Professor Pase said.

“However, to date we have been unsure of the role of slow-wave sleep in the development of dementia. Our findings suggest that slow wave sleep loss may be a modifiable dementia risk factor.”

Associate Professor Pase said that the Framingham Heart Study is a unique community-based cohort with repeated overnight polysomnographic (PSG) sleep studies and uninterrupted surveillance for incident dementia.

“We also examined whether genetic risk for Alzheimer’s disease or brain volumes suggestive of early neurodegeneration were associated with a reduction in slow-wave sleep. We found that a genetic risk factor for Alzheimer’s disease, but not brain volume, was associated with accelerated declines in slow wave sleep.”

Leave a Reply

Your email address will not be published. Required fields are marked *

Advertisement
Advertisement
Advertisement

Self-advocacy toolkit empowers older peoples’ aged care choices

A toolkit designed to equip aged care clients with self-advocacy skills has been released today, encouraging older people to speak up about the care services they receive. Read More

Aged Care Worker Sentenced To A Minimum Of 9 Months Jail For Brutally Bashing An Elderly Resident

A former aged care worker who brutally bashed a 72-year-old dementia patient in her own bed was sentenced to a minimum of nine months jail in an Adelaide courthouse yesterday. Michael Andrew Mullen, 55, was found guilty of horrifically assaulting Ms. Elizabeth Hannaford the Lourdes Valley Nursing Home, at Myrtle Bank, in November of 2015.... Read More

How do we train carers for empathy?

Empathy is the ability to understand and share the feelings of another – a quality that is essential for anyone who in caring for others. However, in this modern world it has become too easy to lose sight of other people’s feeling. Neuroscience research has shown that 98% of people are fully capable of exhibiting... Read More
Advertisement