06/07/2026
Sleep and Brain Health: Why Rest Deserves Attention
Sleep is not a luxury. It is part of caring for the brain.
A 2025 meta-analysis published in GeroScience, bringing together findings from 39 prospective cohort studies, reported that common sleep disorders were associated with a higher risk of dementia and cognitive decline.
The researchers found that:
🌙 Obstructive sleep apnoea was associated with a higher risk of all-cause dementia and Alzheimer’s disease.
🌙 Insomnia was associated with a higher risk of all-cause dementia, Alzheimer’s disease, and vascular dementia.
🌙 Other sleep disorders, including excessive daytime sleepiness and circadian rhythm sleep disturbances, were also linked with dementia risk.
This does not mean that every person who has trouble sleeping will develop dementia. It also does not prove that sleep disorders directly cause dementia. But it reminds us that persistent sleep problems deserve attention, not dismissal.
Sleep supports memory, attention, mood, physical health, and overall well-being. When someone is not sleeping well, they may feel exhausted, foggy, irritable, anxious, or less able to cope with daily life.
For older adults, and for families supporting someone living with dementia, it is important to notice changes such as:
Ongoing difficulty falling or staying asleep
Loud snoring, gasping, or pauses in breathing during sleep
Excessive daytime sleepiness
Increased confusion or agitation at night
A disrupted sleep-wake pattern
These symptoms should not simply be accepted as “part of getting older.” They may need assessment and support from a healthcare professional.
Caring for brain health is not about blame or guarantees. Dementia is never anyone’s fault. But paying attention to sleep, alongside movement, nutrition, social connection, hearing, vision, and cardiovascular health, is an important part of supporting well-being across life.
A good night’s rest may not be a cure, but sleep is still an important part of brain health.
