My Q and A With Claire Sexton on How Sleep — and Lack of Sleep — Affects Our Brains

How does the brain change as we age, and what steps can we take to help our brains stay healthy as time goes by? These are some of the questions Claire Sexton, a post-doctoral research assistant at the Oxford Centre for Functional Magnetic Resonance Imaging of the Brain, is asking. Given that sleep problems affect as much as half of the adult population, this field of study has wide-ranging consequences not only for the quality of our sleep but for our collective well-being.

In answer to my questions, Sexton elaborated on some of her latest scientific findings, shared her thoughts on the next frontier for sleep and brain studies and offered some tips on how to improve the quality of our sleep.

Describe your research on poor sleep and declining brain volume.

Poor sleep quality, which can include difficulties falling asleep, waking up during the night or waking up too early, has previously been linked to reduced brain volume by clinical studies of insomnia. In a study published in the journal Neurology, we used magnetic resonance imaging (MRI) to examine if sleep problems were linked to declining brain volume in a sample of 147 community-dwelling adults aged between 20 and 84 years. We found that poor sleep quality was associated with an increased rate of decline in brain volume over three to five years.

What impact does lack of sleep have on an aging brain, and how early can the effects be seen?

Sleep problems affect up to half of older adults and are associated with an increased risk for dementia. We found that the links between sleep problems and decline in brain volume were particularly strong in adults over the age of 60 years.

We are just beginning to discover the vast implications poor sleep has on the brain. What are —> Read More