A recent study by Chang Gung Memorial Hospital reveals that good sleep quality helps slow memory decline in older adults. The medical team focused on people aged 66 to 88. They examined how sleep habits influence brain health and cognitive function.
First, the researchers asked 72 participants to complete a sleep quality questionnaire. Next, they performed magnetic resonance imaging (MRI) scans on each participant. These tests measured brain activity related to repair and waste removal.
The team found a clear link between good sleep quality and stronger brain repair functions. In contrast, poor sleep quality weakened the brain’s ability to clear toxins. This finding is crucial because the brain’s lymphatic system removes harmful waste during deep sleep. When this system fails, metabolic waste builds up, which may harm memory and thinking skills.
Moreover, the researchers noted that 40% to 70% of elderly people in Taiwan experience sleep problems. Chronic insomnia can raise the risk of dementia, depression, and heart diseases. To address this, doctors often recommend lifestyle changes before prescribing medication. These changes include maintaining a regular sleep schedule, staying physically active, and spending time outdoors.
Traditional Chinese medicine experts also advise avoiding stimulating foods before bed and cutting back on screen time. They suggest adding Omega-3 fatty acids to the diet and exercising regularly to improve sleep quality.
The study team collaborated with the University of Hong Kong’s Psychology Department to analyze advanced brain images. These images confirmed that people with poor sleep showed lower brain activity related to waste clearance. Additionally, brain regions in those with poor sleep did not work well together, which may further affect cognition.
Published in Molecular Psychiatry in October, the research aims to enhance healthcare for Taiwan’s aging population. By the end of 2025, people aged 65 and older will comprise 20.7% of Taiwan’s residents, according to the National Development Council. Ultimately, this study highlights that good sleep quality can protect the brain and slow memory loss in elderly adults.
