A study published in the journal SLEEP found that narcoleptics have a high frequency of REM sleep without atonia, leading to abnormal muscle activity. In contrast, patients with idiopathic REM sleep behavior disorder (RBD) had a higher percentage of REM sleep without atonia but lower REM density.
A new Penn State study suggests ways to improve US rail safety by addressing inadequate security measures, improving coordination between agencies and leveraging the role of railroad police. The report recommends comprehensive legislation, increased funding for security efforts and enhanced training for personnel.
A new study analyzing data from CATIE participants found that schizophrenia patients who also have a history of childhood conduct problems are more likely to commit acts of violence. The researchers suggest that antipsychotic medications may not be sufficient to treat violent symptoms in these individuals, highlighting the need for tar...
Researchers found antibody levels in African American MS patients were 29% higher than Caucasians, linked to increased disability and shorter disease duration. Genetic background differences may contribute to this disparity.
A new study from Rensselaer Polytechnic Institute reveals that carbon nanotubes exhibit fatigue resistance similar to soft tissue, making them suitable for creating synthetic muscle or electro-mechanical systems. The researchers successfully compressed the nanotube block over 500,000 times without significant degradation.
Cornell researchers have solved a fundamental question about DNA strand separation by demonstrating the active role of an enzyme called helicase. The study found that helicase exerts a force onto the fork and separates the two strands, contradicting earlier passive unwinding mechanisms.
A recent study by Kent State University found that nearly 90% of senior residents in four cities were aware of heat warnings, but only half took action. The study highlights the importance of effective heat warning systems to prevent heat-related deaths.
Research reveals elevated manganese levels in scrapie-infected sheep's blood before clinical symptoms appear, hinting at a new diagnostic approach. Scrapie-resistant sheep also show increased manganese levels when challenged with the disease.
Adolescents from low-income families are at higher risk of developing migraines due to stress, poor diet, and limited access to medical care. In contrast, teenagers from affluent households have a lower prevalence of migraines, with only 2.9% experiencing symptoms annually.
A recent analysis of Medicaid data reveals that individuals with co-occurring psychiatric and substance abuse disorders are less likely to utilize community-based services. This pattern holds true for both severe and less severe mental health conditions.
Researchers found that dietary counseling leads to a 6% weight loss after one year, but dieters return to baseline weight after five years. Studies also showed high-dose cholesterol-lowering medication reduces cardiovascular risk in older and younger patients, and beta-blockers decrease plaque buildup in artery walls.
Public health researchers debate whether to inform the public about snus' potential harm reduction benefits. Experts argue that Sweden's experience may not transfer to other settings, and transnational tobacco companies will likely promote snus to increase tobacco sales.
Scientists used satellite images to show a link between rapid city growth and changes in rainfall patterns, including decreased precipitation in winter months. The study found that urbanization can lead to desertification and deforestation, threatening wetland health.
The National Institute for Health and Clinical Excellence (NICE) proposes restricting use of ranibizumab and pegaptanib to patients who have gone blind in one eye. However, the Drug and Therapeutics Bulletin concludes that this approach is 'unacceptable' and calls for universal access to these sight-saving drugs. NICE has also not issu...
Researchers used time-lapse recordings to study IVF embryo development, finding that extended culture increases the likelihood of twinning. Blastocyst collapse may be caused by failed cell junctions, leading to degeneration and the formation of a second inner cell mass.
A new study by UCSF researchers suggests that pre-kindergarten tuberculosis skin testing is not a cost-effective way to spend healthcare dollars. The test would only be beneficial if at least 7% of children tested positive, which is now less than 1%. Instead, finding and treating adults with TB would be a more effective approach.
A study of 1,491 teens aged 10-19 found that video game players spent less time on reading and homework compared to non-gamers. However, gaming habits did not affect social interactions or parent-child relationships, with girls spending more quality time with parents when playing games.
A new study analyzed predictors of sustained virologic response (SVR) in patients with hepatitis C virus (HCV) infection. The results identified several independent factors that impact SVR, including low levels of HCV in the blood, absence of cirrhosis, and genotype other than genotype 1. Patients treated with pegylated interferon alfa...
A team of experts at UCL is creating a controlled environment to study the effects of tsunamis on buildings and coastlines. The new tsunami generator will replicate devastating waves, allowing researchers to design structures better equipped to withstand their impact.
Researchers found that water quality is highest when beaches are busiest with swimmers, stirring up pathogens in the sediment. The studies recommend testing water for microorganisms like C. parvum and G. lamblia during peak usage hours to ensure safe recreational use.
A study published in The Lancet Neurology found that people with epilepsy are three times more likely to commit suicide than the general population. Women with epilepsy face an increased risk, as do those diagnosed with the condition in the previous six months.
A new study reveals that almost all middle-school youth play violent video games, with two-thirds of boys and one in four girls reporting regular play. Children use gaming to manage feelings like anger and stress, while some also play with strangers online.
A new study from British Columbia found that Aboriginal people with heroin addiction are less likely to use methadone maintenance therapy. Compared to non-Aboriginal counterparts, Aboriginal participants were significantly lower rates of methadone use throughout the follow-up period.
A new study published in Annals of Internal Medicine found that dietary counseling results in significant weight loss, with 10-15 pounds lost after one year. Moderate weight loss reduces diabetes, cholesterol, and blood pressure risk, making a lasting impact on overall health.
The journal highlights two articles on cutting-edge bioinformatics software programs, including a user's guide to BLAST and a computational pipeline for identifying DNA variants. These tools enable biologists to analyze large-scale data, infer gene functions, and identify disease predictors.
Researchers at Queen's University find Arctic ponds evaporating due to recent climate warming, crossing ecological threshold. Ponds were once permanent water bodies for millennia but are now drying up and becoming saltier as water evaporates.
A randomized controlled trial shows that the Papworth breathing technique can reduce asthma symptoms by a third, with improvements also seen in mental health outcomes. The technique, which involves diaphragmatic breathing and relaxation exercises, has no significant impact on lung function.
A recent study published in Neurology found that teenagers from low-income households are more likely to suffer from migraine compared to those from upper-income families. The study surveyed over 18,700 adolescents and their parents, revealing a significant association between socioeconomic status and migraine prevalence.
Women with endometriosis face a higher risk of certain cancers, including ovarian, kidney, and thyroid cancer. However, the risk is not affected by whether or not they have given birth. Conversely, women with endometriosis are less likely to develop cervical cancer.
A new study found that blacks with multiple sclerosis have significantly higher levels of an antibody in their spinal fluid than Caucasians, suggesting genetic factors contribute to the difference. The discovery may help explain why black patients are more likely to experience severe symptoms when they develop MS.
A survey of 2,250 people in Rwanda found a lower prevalence of blindness than expected. The study, published in PLoS Medicine, suggests that the country has made significant progress in addressing avoidable blindness in the post-conflict period.
Researchers from the University of Alberta have recorded alarming evidence that Arctic ponds are drying out rapidly, affecting waterfowl habitats and biodiversity hotspots. The study, published in PNAS, reveals a drastic shift in water levels and chemistry over 24 years, consistent with increased evaporation and warmer temperatures.
A new study found high levels of MPO to signal increased risk for heart disease nearly a decade before conventional risk factors set off alarms. Elevated MPO levels also indicate unstable plaque and may be used to detect vulnerable patients.
The use of implantable cardioverter defibrillators is increasing in Canada but remains lower than in the US. In adults who survived a cardiac arrest, the rate increased from 5.4% to 26.7% between 1995 and 2003. The devices are considered safe and effective for people at risk of life-threatening rhythm disturbances.
A 2001-2002 survey found that over 30% of US adults met criteria for an alcohol use disorder, with a significant gap in treatment uptake. The study's findings highlight the importance of identifying and addressing AUDs early in their course to prevent personal disability and societal damage.
Researchers discovered two human antibodies that can neutralize different strains of the SARS virus, which caused outbreaks in humans in 2002-2003. The antibodies were tested in lab assays and mouse models, showing potent neutralization of the virus.
A new biogeographic classification system, Marine Ecoregions of the World, is described in BioScience, providing a valuable tool for conservation planning. The system groups coastal and shelf areas into 232 distinct ecoregions, enabling researchers to identify critical areas for conserving endangered species.
Researchers report that much of Tahiti's original genetic diversity still exists in remnant populations, offering a glimmer of hope for conservation efforts. The study suggests that targeted measures may preserve a representative fraction of the island's endemic tree snail genetic diversity.
The Johns Hopkins Fogarty African Research Ethics Training Program has successfully trained 23 African professionals in bioethics, enabling them to implement changes in their home countries. Trainees have made institutional changes, drafted guidelines, and raised awareness of the need for research ethics support.
Rats who received help in the past were more likely to help another unknown partner, demonstrating generalized reciprocal cooperation. This finding suggests that evolutionary explanations for cooperation in animals may be broader than previously thought, potentially involving cultural and anonymous experiences.
Experimental studies suggest that targeting angiogenesis with dopamine agonists and dendritic cell inhibitors may inhibit endometrial lesions and decrease cancer risk. Mouse models show reduced blood vessel formation and increased old blood vessels in treatment groups.
Researchers suggest using insecticide-treated bed nets for adults and older children to protect against malaria. The strategy could substantially enhance protection of vulnerable groups by reducing mosquito transmission.
The Gerontological Society of America has awarded 20 PhD students the 2007 Hartford Pre-Dissertation Award for their research on aging. The recipients will receive funding to attend workshops and present their work at conferences.
A recent study by Northwestern University researchers found that animals who are partially sleep deprived over consecutive days no longer attempt to catch up on sleep, despite an accumulating sleep deficit. This suggests that chronic partial sleep loss negatively affects the body's ability to compensate for lost sleep.
Researchers from USC identified a technique for determining a tumor's 'immune signature,' which could lead to personalized medicine and improved diagnosis. The analysis revealed that a small subset of genes is integral in explaining immunological behavior, and may be useful for matching tumors with available therapies.
Most UK sports clubs do not conduct comprehensive preparticipation medical evaluations, despite recommended guidelines. A survey found that less than half of cricket and rugby union clubs recorded player concussion histories before employment.
An analysis of US city-specific weather data reveals that global warming will lead to more deaths in summer due to extreme temperatures. Deaths from all causes are known to rise when temperatures go up, and heart attacks and cardiac arrests are more likely when it is very cold.
A team of scientists from WWF and Conservation International has discovered the world's largest known population of grey-shanked doucs, increasing chances that the endangered monkey can be saved from extinction. The population is estimated to have over 180 individuals, with significantly more potentially living in adjacent forest areas.
Physicists have created the world's first heat transistor and remotely controlled nanomachines, enabling tiny refrigerators and heaters. The team also found that air pressure affects landing on Martian dunes, making low-pressure atmospheres favorable for robot landings.
A study found that older patients with stable cardiovascular disease can benefit from high-dose statins, which lowered LDL cholesterol levels and reduced the risk of major cardiovascular events. The study suggests that aggressive use of high-dose statin therapy can be beneficial for these patients.
Scientists have discovered that mother-of-pearl's unique mosaic architecture, with non-aligned crystals, may contribute to its exceptional strength by preventing the formation of natural cleavage planes. Researchers aim to model and reproduce this process to develop new biomimetic materials with improved mechanical properties.
Researchers at the University at Buffalo discovered that high levels of cystatin C can predict an increased risk of developing pre-diabetes. The study, based on the Western New York Health Study, found a three-fold association between cystatin C levels and progression to pre-diabetes.
A new startup company, Catilin Inc., is working to revolutionize biodiesel production using Victor Lin's nanosphere-based catalyst. The technology has the potential to make production cheaper, faster, and less toxic, while producing a cleaner fuel and glycerol co-product.
Researchers found that older adults with difficulty identifying common odors were more likely to develop mild cognitive impairment and Alzheimer's disease. Olfactory dysfunction was associated with lower cognitive scores and a faster decline in memory, supporting the idea that smell identification may be an early indicator of Alzheimer's.
Two studies published in JCI uncover regulators of squamous cell carcinoma development, highlighting the critical role of p53 tumor suppressor gene mutations and chemokine receptor D6. The findings suggest that certain p53 mutations accelerate SCC progression and that inflammation sensitizes skin cells to tumor formation.
A new algorithm for personalized ovarian stimulation therapy has been developed, demonstrating improved pregnancy rates in women undergoing fertility treatment. The formula, based on four easily measured patient characteristics, was tested in a prospective clinical study involving 161 patients.
Researchers from Indiana University found that 68% of pediatrician malpractice cases were withdrawn or dismissed, and only 5% went to trial. Pediatricians accounted for only 2.97% of all malpractice claims, with median payments rising from $65,000 in 1985 to $270,000 in 2005.
Regulatory warnings about antidepressant risks led to a 33% decrease in new prescriptions among Tennessee's expanded Medicaid program. Fluoxetine prescriptions actually increased, suggesting altered treatment decisions.
A recent study found that approximately 30% of Americans experience some form of alcohol use disorder, leading to significant impairment and distress. The study also revealed that disability levels increase steadily as dependence becomes more severe, with males and younger adults being disproportionately affected.
Researchers at Ohio State University have developed software that enables smart traffic boxes to detect road incidents more efficiently, reducing communication costs by up to 90% and achieving accuracy rates of over 90%. This innovation aims to help transportation authorities identify incidents more effectively, thereby reducing conges...