Differences in the microstructure of the nucleus accumbens (NAcc), a region in the brain that plays an important role in processing food and other reward stimuli, predict increases in indicators of obesity in children, according to a study funded by the National Institute on Drug Abuse (NIDA) and nine other institutes, all part of the National Institutes of Health. The paper, published today in the journal Proceedings of the National Academy of Sciences, is based on data from the Adolescent Brain Cognitive Development (ABCD) Study. The ABCD Study will follow nearly 12,000 children through early adulthood to assess factors that influence individual brain development and other health outcomes.
Findings from this study provide the first evidence of microstructural brain differences that are linked to waist circumference and body mass index (BMI) in children. These microstructural differences in cell density could be indicative of inflammatory processes triggered by a diet
Facebook has removed 276 accounts that used fake profiles to pose as right-leaning Americans and comment on news articles, often in favor of President Donald Trump, the company announced Thursday.
The platform also permanently banned an Arizona-based digital communications firm that it said was behind the fake accounts.
The move was prompted by reporting last month in The Washington Post that a pro-Trump group known as Turning Point Action was paying teenagers to post coordinated, supportive messages, a violation of Facebook’s rules.
Facebook and Twitter have been regularly removing fake accounts — both domestic and foreign — that try to insert themselves in the U.S. political discourse and influence the election. But social media companies face broader threats around misinformation and voter suppression that at times come from President Donald Trump himself.
The latest network Facebook removed became active before the 2018 midterm elections
University of Arkansas researchers have established a link between climate patterns in the Amazon and large parts of North and South America using their newly developed tree-ring chronology from the Amazon River basin.
The discovery helps researchers better understand large-scale climate extremes and the impact of the El Niño phenomenon.
Tree growth is a well-established climate proxy. By comparing growth rings in Cedrela odorata trees found in the Rio Paru watershed of the eastern Amazon River with hundreds of similar chronologies in North and South America, scientists have shown an inverse relationship in tree growth, and therefore precipitation patterns, between the areas. Drought in the Amazon is correlated with wetness in the southwestern United States, Mexico and Patagonia, and vice versa.
The process is driven by the El Niño phenomenon, which influences surface-level winds along the equator, researchers said. El Niño is the name given to
Over the past several weeks, there has been an increasing clamour for Facebook to place its India public policy head, Ankhi Das, on leave as the company continues with an audit of its India operations.
The impetus for the audit was an article written by the Wall Street Journal in mid-August. In that piece, WSJ reported that Das had resisted against taking down inflammatory content that eventually sparked rioting in the capital city of Delhi as it was posted by members of the nationalist BJP party.
The riots left over fifty dead, most of whom were Muslims. It also led to many of these Muslims’ homes being torched.
“The company’s top public-policy executive in the country, Ankhi Das, opposed applying the hate-speech rules to [T Raja] Singh and at least three other Hindu nationalist individuals and groups flagged internally for promoting or participating in violence,” WSJ reported.
Scientists have found that as the world undergoes profound environmental change, identifying and protecting ‘novel’ communities of species can help prevent extinctions within vulnerable ecosystems.
Professor John Pandolfi and Dr Timothy Staples from the ARC Centre of Excellence for Coral Reef Studies at The University of Queensland (CoralCoE at UQ) are the lead authors of a new study in Science that looked at how combinations of plankton species changed across the world’s marine ecosystems in the past 66 million years. From this, their team developed a world first method to detect ‘novel’ communities of species across all ecosystems.
“A novel ecological community is one with combinations of species that are different to any past observations from that site,” Prof Pandolfi said. “These different species combinations can be due to new species arriving in the community, existing species leaving, or species becoming rarer or more common.”
Facebook has removed 200 fake accounts created by a marketing firm that was working for an affiliate of conservative youth group Turning Point USA.
The company announced that it had discovered a coordinated campaign to use fake accounts to comment on news articles, writing messages centered around topics like the coronavirus outbreak and the 2020 election.
In examples published by Facebook, commenters criticized mail-in ballots, promoted big game hunting, and said Democrats “will do anything to screw over Americans.”
Facebook said it discovered the campaign after reporting from the Washington Post last month found that the affiliate group, Turning Point Action, was paying teenagers to post pro-Trump messages.
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Facebook has removed hundreds of fake accounts created by a marketing firm working for Turning Point Action, an affiliate of pro-Trump youth group Turning Point USA, the company announced Thursday.
Exercise intensity appears to make no difference to risk of mortality among older adults, suggests a randomised controlled trial from Norway published by The BMJ today.
Physical activity has been highlighted as one of the most important actions people of all ages can engage in to improve health, and data from observational studies show that early death is significantly reduced in physically active compared with inactive individuals.
Yet high quality clinical trial evidence on a potential direct (causal) relation between current advice on physical activity levels and longevity is lacking.
So an international research team set out to evaluate the effect of five years of supervised exercise training compared with recommendations for physical activity on mortality in older adults (70-77 years).
The trial involved 1,567 participants (790 women and 777 men) living in Trondheim, Norway, with an average age of 73 years. In total, 87.5% of participants reported overall good
Patients who suffer an intracerebral hemorrhage (ICH) face an increased risk of acute kidney injury (AKI) during their hospitalization. AKI can lead to sudden kidney failure, kidney damage or even death. Researchers from the University of Missouri School of Medicine and MU Health Care have determined which ICH patients are at the highest risk for this kidney injury so doctors can take precautions to prevent it. They also examined how the commonly-used blood pressure lowering drug nicardipine contributes to AKI.
“Over the past five years, clinicians have been concerned about AKI as they see patients who present with ICH, then develop kidney failure and require dialysis,” said lead researcher Adnan I. Qureshi, MD, a professor of clinical neurology at the MU School of Medicine. “What we need is a more global body approach to improve the outcome of patients with ICH, rather than just focusing on the brain.”
Can’t stop checking social media for the latest COVID-19 health information? You might want to take a break, according to researchers at Penn State and Jinan University who discovered that excessive use of social media for COVID-19 health information is related to both depression and secondary trauma.
“We found that social media use was rewarding up to a point, as it provided informational, emotional and peer support related to COVID-19 health topics,” said Bu Zhong, associate professor of journalism, Penn State. “However, excessive use of social media led to mental health issues. The results imply that taking a social media break may promote well-being during the pandemic, which is crucial to mitigating mental health harm inflicted by the pandemic.”
The study, which published online on Aug. 15 in the journal Computers in Human Behavior, included 320 participants living in urban districts of Wuhan, China. In February 2020, the team
A type of anti-bacterial T cells, so-called MAIT cells, are strongly activated in people with moderate to severe COVID-19 disease, according to a study by researchers at Karolinska Institutet in Sweden that is published in the journal Science Immunology. The findings contribute to increased understanding about how our immune system responds against COVID-19 infection.
“To find potential treatments against COVID-19, it is important to understand in detail how our immune system reacts and, in some cases, perhaps contribute to worsening the disease,” says Johan Sandberg, professor at the Department of Medicine, Huddinge, at Karolinska Institutet and the study’s corresponding author.
T cells are a type of white blood cells that are specialized in recognizing infected cells, and are an essential part of the immune system. About 1 to 5 percent of T cells in the blood of healthy people consist of so-called MAIT cells (mucosa-associated invariant T cells), which