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Link between Social Isolation and Brain Volume - Video

Published On 2022-06-17T09:00:02+05:30  |  Updated On 17 Jun 2022 3:24 PM IST
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Overview

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.

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 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.

Speakers

Isra Zaman

B.Sc Life Sciences, M.Sc Biotechnology, B.Ed

Isra Zaman is a Life Science graduate from Daulat Ram College, Delhi University, and a postgraduate in Biotechnology from Amity University. She has a flair for writing, and her roles at Medicaldialogues include that of a Sr. content writer and a medical correspondent. Her news pieces cover recent discoveries and updates from the health and medicine sector. She can be reached at editorial@medicaldialogues.in.

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. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751
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