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You are here: Home / Health / Seniors With Poor Sleep Quality May Be at Higher Risk of Stroke

Seniors With Poor Sleep Quality May Be at Higher Risk of Stroke

January 15, 2016 Posted by Emma Carter

sleep fragmentation

Sleep disturbance is linked to several health consequences in all age demographics, but a new study has found that seniors with poor sleep quality may be at higher risk of stroke and dementia.

According to a team of Canadian researchers, sleep fragmentation – characterized by multiple waking episodes over the course of one night – is associated with little brain changes that are detectable only in autopsies.

It was found that the risk of small brain arteries to solidify increases proportionally with the severity of the sleep fragmentation. Experts also discovered that when sleep disturbance becomes worse, it increases the death chances of the brain tissue due to limited oxygen in small strokes.

This study focused on analyzing the relationship between sleep and the profound histopathology of stroke. Based on autopsy observations, the researchers tested the hypothesis that increased sleep fragmentation is linked to more severe lack of oxygen and brain vessel damage.

In that regard, the team studied the autopsied brains of 315 subjects, whose average age was of 90 years old. All of the participants had undergone at least a week of sleep quality evaluation before they passed away.

Roughly 29 percent of the participants had suffered a stroke, while 61 percent sustained moderate-to-severe damage to their brain blood vessels. The average waking times in the subjects were seven times over the course of an hour, but researchers noted some experienced additional waking episodes.

The conclusions showed that the subjects with higher degrees of sleep fragmentation had 27 percent more chances of developing hardened brain arteries. Two more waking episodes than the average 7 were associated with a 30 percent increase in the brain’s lack of oxygen.

Trying to explain this connection, senior author Andrew Lim from the University of Toronto said it is possible that the repeated waking episodes contribute to increased blood pressure, which in turn poses a threat to blood vessels.

However, Lim’s findings do not support a cause-and-effect relationship between sleep disturbance and stroke. Further evidence is required before the researchers can be sure that treating sleep fragmentation would make a difference.

He also explained that brain circulation could be disturbed by sleep fragmentation, or it could be vice-versa; in other words, both might also be caused by another underlying factor. That’s why more investigation about the root and other aspects of sleep fragmentation could offer clearer answers.

But until researchers find an explanation, we are prompted to improve and maintain high sleep quality, especially as we age.
Image Source: About Arthritis

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Filed Under: Health

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About Emma Carter

Emma is a Europe based writer who never imagined that one day she would be covering news from all around the world. She holds a bachelor’s degree in linguistic studies and her love for words drove her to journalism. Emma is dedicated to social issues and believes that writing about justice and equality is a good start in leaving her footprint behind.

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