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Daily Rhythms Linked to Brain Atrophy
17 Apr
Summary
- Fragmented daily rhythms linked to smaller memory brain areas.
- Disrupted rest-activity patterns correlate with brain shrinkage.
- Regularity in daily rhythms may support brain health.
A recent study has uncovered a link between disrupted circadian rhythms and brain atrophy in older adults. Researchers found that individuals with more fragmented daily rest-activity patterns exhibited smaller volumes in key brain regions associated with memory and emotion. These areas, including the hippocampus and amygdala, are particularly vulnerable in Alzheimer's disease.
The study, published in Alzheimer's & Dementia: The Journal of the Alzheimer's Association, analyzed data from 344 participants over age 73. Using wrist accelerometers and MRI scans, scientists measured rest-activity rhythms and brain volumes. Results indicated that a less fragmented rhythm was associated with larger brain volumes in memory-related areas and less shrinkage in the amygdala.
Furthermore, fragmented rhythms correlated with a faster increase in the volume of brain ventricles, suggesting a connection to more widespread brain tissue loss over time. Experts advise maintaining regularity in daily routines, such as consistent sleep-wake cycles and meal times, to potentially support brain health.
While the study demonstrates a strong association, it does not definitively prove causation between fragmented rhythms and brain shrinkage. Consulting a clinician about sleep issues or medications that might affect alertness is also recommended for maintaining healthier brain aging.
