Sleep disorder linked with brain changes found in dementia
Sydney, July 5: A sleep disorder that causes repeated shallow or paused breathing may be associated with changes in brain structure that are also seen in the early stages of dementia.
Obstructive sleep apnoea (OSA), common among elderly, is a condition where the walls of the throat relax and narrow during sleep, stopping breathing, and is known to reduce levels of oxygen in the blood. It has also been linked with heart diseases, strokes and cancer.
The new study suggested that the drop in oxygen may be linked to a shrinking of the brain's temporal lobes and a corresponding decline in memory.
"Between 30 and 50 per cent of the risk for dementia is due to modifiable factors, such as depression, high blood pressure, obesity and smoking. In recent years, researchers have recognized that various sleep disturbances are also risk factors for dementia," said lead author, Sharon Naismith, from the University of Sydney, Australia.
"We wanted to look specifically at obstructive sleep apnoea and its effects on the brain and cognitive abilities," Naismith added.
In the study, published in European Respiratory Journal, the researchers analysed data from nearly 100 participants aged between 51 and 88 years, who had visited doctors with concerns over their memory or mood but had no OSA diagnosis.
The results showed that patients who had low levels of oxygen in their blood while they were sleeping tended to have reduced thickness in the left and right temporal lobes of the brain -- regions known to be important in memory and affected dementia.
Further, the team found that this alteration in the brain was linked with participant's poorer ability to learn new information.
"There is no cure for dementia so early intervention is the key. On the other hand, we do have an effective treatment for OSA. This research shows that diagnosing and treating OSA could be an opportunity to prevent cognitive decline before it's too late," Naismith added.
Let the Truth be known. If you read VB and like VB, please be a VB Supporter and Help us deliver the Truth to one and all.
Poll boycott in Chamarajnagar village: Govt officers, voter injured; booth, EVM destroyed by protest
Chamarajnagar: In an untoward incident reported from Indiganatta village under the Mahadeshwara Hills Gram Panchayat administration limits in Hanur taluk, government officials were injured as they attempted at pacifying a group of angry voters who had declared they were boycotting the polls on Friday.
Tahsildar Guruprasad and Taluk Panchayat Chief Officer Umesh and a police inspector were reportedly injured in the clash. In addition, the protesters are learned to have destroyed the polling booth, including the electronic voting machine (EVM), set up in the village. One of the voters who visited the booth was reportedly injured in the head in the incident.
Angry over the non-availability of infrastructure in their village, the voters in Indiganatta declared that they would not exercise their right to franchise on Friday. Guruprasad, Umesh and the police officer, who were informed of the boycott, visited Indiganatta to appease the voters and get them to cast vote. The group of voters, however, directed their anger at the officers, resulting in the trio being injured.
The protesters in Indiganatta were not only adamant about their boycott, but also infuriated by the sight of other voters in the village cast ballot at the polling booth. In anger, they initially had an argument with the voters but later forced their way into the booth and reportedly destroyed the EVM there.
Polling is currently reported to have been stalled in Indiganatta due to the violent incident.
