Short sleep, aging brain

July 1, 2014
brain
White matter fiber architecture of the brain. Credit: Human Connectome Project.

Researchers at Duke-NUS Graduate Medical School Singapore (Duke-NUS) have found evidence that the less older adults sleep, the faster their brains age. These findings, relevant in the context of Singapore's rapidly ageing society, pave the way for future work on sleep loss and its contribution to cognitive decline, including dementia.

Past research has examined the impact of on cognitive functions in . Though faster brain ventricle enlargement is a marker for and the development of neurodegenerative diseases such as Alzheimer's, the effects of sleep on this marker have never been measured.

The Duke-NUS study examined the data of 66 older Chinese adults, from the Singapore-Longitudinal Aging Brain Study(1). Participants underwent structural MRI brain scans measuring brain volume and neuropsychological assessments testing cognitive function every two years. Additionally, their sleep duration was recorded through a questionnaire. Those who slept fewer hours showed evidence of faster ventricle enlargement and decline in cognitive performance.

"Our findings relate short sleep to a marker of brain aging," said Dr June Lo, the lead author and a Duke-NUS Research Fellow. "Work done elsewhere suggests that seven hours a day(2) for adults seems to be the sweet spot for optimal performance on computer based cognitive tests. In coming years we hope to determine what's good for cardio-metabolic and long term brain health too," added Professor Michael Chee, senior author and Director of the Centre for Cognitive Neuroscience at Duke-NUS.

The study is published in the journal SLEEP on July 1, 2014.

Explore further: Shorter sleep duration and poorer sleep quality linked to Alzheimer's disease biomarker

Related Stories

Recommended for you

Neuroscientists illuminate role of autism-linked gene

May 25, 2016

A new study from MIT neuroscientists reveals that a gene mutation associated with autism plays a critical role in the formation and maturation of synapses—the connections that allow neurons to communicate with each other.

Study identifies how brain connects memories across time

May 23, 2016

Using a miniature microscope that opens a window into the brain, UCLA neuroscientists have identified in mice how the brain links different memories over time. While aging weakens these connections, the team devised a way ...

Teen brains facilitate recovery from traumatic memories

May 25, 2016

Unique connections in the adolescent brain make it possible to easily diminish fear memories and avoid anxiety later in life, according to a new study by Weill Cornell Medicine researchers. The findings may have important ...

1 comment

Adjust slider to filter visible comments by rank

Display comments: newest first

inv_slepi
1 / 5 (2) Jul 01, 2014
but Issac newton was sleep 2 hours and half.

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.