Study links nighttime micro-awakenings to higher genetic Alzheimer risk

A Belgian study has found that frequent nighttime micro-awakenings are associated with a higher genetic predisposition to Alzheimer's disease in healthy middle-aged adults. The research, conducted by the University of Liège and published in the journal Sleep, analyzed the sleep patterns of 540 healthy participants, including 453 young adults (average age 22) and 87 middle-aged adults (around 59 years old) Source: La Vanguardia. The findings suggest that certain types of brief brain activations during sleep, rather than just the number of awakenings, may serve as an early indicator of vulnerability to Alzheimer's Source: Infobae.

Key findings

• The association between micro-awakenings and genetic risk was observed only in middle-aged participants, not in younger adults Source: Infobae.
• The study used a polygenic risk score, which combines the effects of multiple genetic variants, but this score alone cannot predict who will develop the disease Source: La Vanguardia.
• Researchers also found a link between these micro-awakenings and poorer attention performance and memory changes during follow-up Source: La Vanguardia.

What it means

Experts caution that the results do not prove that waking up frequently causes Alzheimer's, nor can they be used as a diagnostic tool Source: La Vanguardia. However, the findings open a new avenue for studying sleep as a potential early marker of Alzheimer's vulnerability, potentially helping to identify at-risk individuals before memory problems appear Source: Infobae. The study received support from the Stop Alzheimer's Foundation Source: Infobae.