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  • Social isolation may...

Social isolation may impact brain volume in regions linked to higher risk of dementia

Dr. Kamal Kant KohliWritten by Dr. Kamal Kant Kohli Published On 2022-06-13T19:45:56+05:30  |  Updated On 13 Jun 2022 4:20 PM GMT
Social isolation may impact brain volume in regions linked to higher risk of dementia

MINNEAPOLIS: Social isolation is linked to lower brain volume in areas related to cognition and a higher risk of dementia, according to research published in the June 8, 2022, online issue of Neurology, the medical journal of the American Academy of Neurology. The study found that social isolation was linked to a 26% increased risk of dementia, separately from risk factors like depression...

MINNEAPOLIS: Social isolation is linked to lower brain volume in areas related to cognition and a higher risk of dementia, according to research published in the June 8, 2022, online issue of Neurology, the medical journal of the American Academy of Neurology. The study found that social isolation was linked to a 26% increased risk of dementia, separately from risk factors like depression and loneliness.

"Social isolation is a serious yet underrecognized public health problem that is often associated with old age," said study author Jianfeng Feng, PhD, of Fudan University in Shanghai, China. "In the context of the COVID-19 pandemic, social isolation, or the state of being cut off from social networks, has intensified. It's more important than ever to identify people who are socially isolated and provide resources to help them make connections in their community."

The study looked at 462,619 people across the United Kingdom with an average age of 57 at the beginning of the study who were followed for nearly 12 years before the pandemic. Of those, 41,886, or 9% of people reported being socially isolated, and 29,036, or 6% of people felt lonely. During the study, 4,998 developed dementia.

Researchers collected survey data from participants, along with a variety of physical and biological measurements, including MRI data. Participants also took thinking and memory tests to assess their cognitive function. For social isolation, people were asked three questions about social contact: whether they lived with others; whether they had visits with friends or family at least once a month; and whether they participated in social activities such as clubs, meetings or volunteer work at least once a week. People were considered socially isolated if they answered no to at least two questions.

Of the 41,886 people with social isolation, 649 people developed dementia, or 1.55%, compared to 4,349 people of the 420,733 people who were not socially isolated or 1.03%.

After adjusting for factors including age, sex, socioeconomic status, alcohol intake and smoking, and other conditions like depression and loneliness, researchers found that socially isolated individuals had lower volume in the brain's gray matter in various regions involved with learning and thinking. Researchers found that people who were socially isolated were 26% more likely to develop dementia than those with no social isolation. Researchers also looked at loneliness, but after adjusting, saw no strong correlation with developing dementia.

"People who reported high levels of social isolation had significant differences in brain volume, also associated with cognition and dementia," said Feng. "Given the findings of this study, social isolation may be an early indicator of an increased risk of dementia."

People who reported higher levels of social isolation were more likely to have lower gray matter volume in areas of the brain associated with learning and thinking. Overall, the results showed that lower gray matter volumes were associated with higher social isolation.

A limitation of the study was that participants reported fewer health conditions and were less likely to live alone than the general population, so the results may not apply to the general population.

The study was supported by the Chinese Ministry of Science and Technology, National Natural Sciences Foundation of China, the municipal government of Shanghai, ZJ Lab, Shanghai Center for Brain Science and Brain-Inspired Technology and the Wellcome Trust.

The study was a collaboration between Fudan University, the University of Cambridge and the University of Warwick.

Neurology isolation brain social isolation dementia COVID 19 cognitive function MRI Parkinson’s disease epilepsy 
Source : Neurology
Dr. Kamal Kant Kohli
Dr. Kamal Kant Kohli

    Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Before Joining Medical Dialogues, he has served at important positions in the medical industry in India including as the Hony. Secretary of the Delhi Medical Association as well as the chairman of Anti-Quackery Committee in Delhi and worked with other Medical Councils in India. Email: editorial@medicaldialogues.in. Contact no. 011-43720751

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