Tuesday January 28, 2020

Small Head Blows Can Also Increase Risk of Dementia

In total, 357,558 participants, whose average age was 49, were tracked.

0
//
Concussion without loss of consciousness led to 2.36 times the risk for dementia, showed the findings published in the journal JAMA Neurology.
Head blows can cause dementia, Pixabay

Even head blows that do not result in loss of consciousness may cause brain changes that increase the risk of dementia, new research has found.

The study, which tracked more than 350,000 participants, showed that the likelihood of dementia more than doubled following concussion.

Concussion without loss of consciousness led to 2.36 times the risk for dementia, showed the findings published in the journal JAMA Neurology.

These risks were slightly elevated for those in the loss-of-consciousness bracket (2.51) and were nearly four times higher (3.77) for those with the more serious moderate-to-severe traumatic brain injury.

The researchers identified participants from two databases. The first group included all-era veterans whose traumatic brain injuries could have occurred during civilian or military life.

The second group included veterans serving in Iraq and Afghanistan, for whom most of these injuries had occurred in combat zones, such as from shockwaves in blasts.

Even head blows that do not result in loss of consciousness may cause brain changes that increase the risk of dementia, new research has found.
Dementia, Pixabay

“The findings in both groups were similar, indicating that concussions occurring in combat areas were as likely to be linked to dementia as those concussions affecting the general population,” said first author Deborah Barnes, Professor at the University of California, San Francisco, US.

In total, 357,558 participants, whose average age was 49, were tracked.

Half had been diagnosed with traumatic brain injury, of which 54 per cent reported experiencing concussion.

The study followed the participants for an average of 4.2 years.

“There are several mechanisms that may explain the association between traumatic brain injury and dementia,” said senior author and principal investigator Kristine Yaffe, Professor at the University of California, San Francisco.

Also Read: Researchers Identified Protein Associated With Breast Cancer

 “There’s something about trauma that may hasten the development of neurodegenerative conditions. One theory is that brain injury induces or accelerates the accumulation of abnormal proteins that lead to neuronal death associated with conditions like Alzheimer’s disease,” Yaffe said.

Alzheimer’s disease is the most common form of dementia.

“It’s also possible that trauma leaves the brain more vulnerable to other injuries or ageing processes,” Yaffe said. (IANS)

Next Story

Living Near a Major Road or Highway Can Cause Neurological Diseases

The researchers suggest that this protective effect could be due to several factors

0
Highway
Research found that living less than 50 metres from a major road or less than 150 metres from a highway is associated with a higher risk of developing neurological disorders -- likely due to increased exposure to air pollution. Pixabay

Researchers have revealed that living near a major road or highway is linked to higher incidence of dementia, Parkinson’s disease, Alzheimer’s disease and multiple sclerosis (MS).

For the findings, published in the journal Environmental Health, researchers from the University of British Columbia analysed data for 678,000 adults in Metro Vancouver.

They found that living less than 50 metres from a major road or less than 150 metres from a highway is associated with a higher risk of developing neurological disorders — likely due to increased exposure to air pollution.

“For the first time, we have confirmed a link between air pollution and traffic proximity with a higher risk of dementia, Parkinson’s, Alzheimer’s and MS at the population level,” said study lead author Weiran Yuchi from the University of British Columbia in Canada.

Neurological disorders, a term that describes a range of disorders, are increasingly recognised as one of the leading causes of death and disability worldwide.

Little is known about the risk factors associated with neurological disorders, the majority of which are incurable and typically worsen over time.

For the study, researchers analysed data for 678,000 adults between the ages of 45 and 84 who lived in Metro Vancouver from 1994 to 1998 and during a follow-up period from 1999 to 2003.

Highway
Researchers have revealed that living near a major road or highway is linked to higher incidence of dementia, Parkinson’s disease, Alzheimer’s disease and multiple sclerosis (MS). Pixabay

They estimated individual exposures to road proximity, air pollution, noise and greenness at each person’s residence using postal code data.

During the follow-up period, the researchers identified 13,170 cases of non-Alzheimer’s dementia, 4,201 cases of Parkinson’s disease, 1,277 cases of Alzheimer’s disease and 658 cases of MS.

For non-Alzheimer’s dementia and Parkinson’s disease specifically, living near major roads or a highway was associated with 14 per cent and seven per cent increased risk of both conditions, respectively.

When the researchers accounted for green space, they found the effect of air pollution on the neurological disorders was mitigated.

The researchers suggest that this protective effect could be due to several factors.

Highway
A Study estimated individual exposures to road and Highway proximity, air pollution, noise and greenness at each person’s residence using postal code data. Pixabay

“For people who are exposed to a higher level of green space, they are more likely to be physically active and may also have more social interactions,” said study senior author Michael Brauer.

ALSO READ: Pentagon Blocks Commerce Department-Backed Ban on Sales By Tech Giant Huawei

“There may even be benefits from just the visual aspects of vegetation,” Brauer added. (IANS)