Studies reveal that the ventral frontal lobe and orbitofrontal cortex respond to somatosensory stimulation, while other areas show less consistent activation. The findings suggest a more modality-specific sensory process in humans compared to monkeys.
Researchers used fMRI to compare representation of repetition rate across cortical and subcortical structures in human auditory pathway. Findings revealed distinct patterns of activity in response to trains with varying repetition rates, shedding new light on neural representations of sound perception.
A study using MRI found that procedural learning and declarative learning activate the same neural networks, despite requiring different levels of awareness. The brain's prefrontal cortex, inferior parietal cortex, and putamen were active in both cases, suggesting a shared underlying network.
Dr. Barbara Block, a MacArthur Award winner, will present the Scholander Award for outstanding research on comparative physiology. The award recognizes her work on tuna migration patterns using satellite-based tagging technology, which has implications for preserving tuna species and managing fisheries.
A new study investigates blood flow in toads' pelvic skin while absorbing water, finding a significant increase in red cell velocity prior to water exposure and a seven-fold increase within one minute. The results support the initial hypothesis that increased blood flow is associated with water absorption behavior.
A study by Pauline Entin, PhD, found no significant gender difference in running speed for horses, which contradicts the assumption that men are faster than women. In contrast, female horses have been successful in premier events and dogs show a similar lack of gender-based segregation in racing.
Researchers have discovered that hibernating ground squirrels can tolerate extreme cold and stress without damage, which could lead to breakthroughs in organ preservation for humans. Their intestines display reduced oxidative stress during hibernation, and their livers show improved viability when stored at low temperatures.
Research suggests that hammerheads' electrosensory function enhances their food-finding capabilities along the ocean floor. The study also found that the cephalofoil acts like a canard to increase maneuvering capabilities, enabling the sharks to turn more sharply and with greater velocity than comparable species.
Researchers discover four distinct hemoglobin types in newborn Tammar wallabies, which persist for several days after birth. These embryonic-type hemoglobins have low oxygen affinity and do not function as tetrameric molecules.
Researchers studied muskrats' response to hypothermia, finding no metabolic benefit despite reduced diving heart rate. The study suggests alternative explanations for the muskrat's unique diving abilities.
Researchers are developing robots inspired by cockroaches' legs using biomimetics and Shape Deposition Manufacturing. The study found that a cockroach leg's response to displacement inputs can be modeled as a viscoelastic material, enabling the design of stable and compliant robot legs.
Yellowfin tuna have a carotid rete that acts as a thermal barrier, regulating brain temperature during rapid changes in environmental temperatures. The study found that the heat-exchanger system is effective in minimizing heat loss, but can be adjusted to regulate warmer brain temperatures.
Scientists suggest elephants have an aquatic ancestry, supported by their unique pleural space and snorkeling behavior. The elephant's dense connective tissue replaces delicate pleura, allowing for some sliding of the two surfaces across each other.
Researchers found that pythons exhibit specific dynamic action responses to certain foods, which are associated with increased energy expenditure. These findings suggest that pythons have evolved to optimize their metabolic rate by consuming specific diets.
Researchers found that linoleic acid significantly improved vasodilatory responses and decreased systolic blood pressures in spontaneously hypertensive rats. The study also showed that linoleic acid administration improved spatial reference memory in older SHRs, suggesting a positive link between D1 receptor density and cognitive funct...
A study finds that a lack of physical activity disrupts normal homeostatic mechanisms, leading to an increased risk of chronic conditions. The research highlights the importance of physical activity in preventing common chronic diseases, including cancer, cardiovascular diseases, and metabolic disorders.
A recent study by the American Physiological Society found that non-coffee drinkers experience a greater ergogenic benefit from caffeine consumption compared to regular users. Caffeine's effect on physical productivity was also examined, revealing no significant increase in performance for sustained coffee drinkers.
Research study finds a positive association between obesity and long QTc, as well as an inverse association between physical activity and QTc duration in African American women. The study suggests that otherwise healthy individuals with obesity are at increased risk for acquiring Long QT Syndrome.
A new study examines the relationship between adiponectin levels, body composition, and obesity-related risk factors in children. The research suggests that children from lower socio-economic backgrounds are at high risk of developing type-2 diabetes due to dysregulation of adiponectin secretion.
Researchers found that chokeberry extract can protect coronary arteries from oxidant injury, while bilberry extract provides partial protection. The study suggests that individual components in berries may be responsible for their vascular effects.
Researchers found that a unique blood plasma volume expander can resuscitate rats after severe hemorrhage and apnea, with some surviving up to 7 days without blood transfusions. Hyperbaric oxygen appears to confer advantages in resuscitation and maintenance of circulation.
A green tea extract has been shown to prevent primary graft failure after transplantation of fatty livers, increasing survival rates to 75%. This study confirms the association between increased free radical formation and graft failure, suggesting a potential therapy to prevent failure of previously rejected livers.
A recent study found that bainiku-ekisu inhibits AngII-induced EGF receptor transactivation and ERK activation in vascular smooth muscle cells, suggesting its potential as a new therapeutic agent for cardiovascular diseases like hypertension and atherosclerosis.
The American Physiological Society has awarded 44 minority travel fellowships to graduate students, postdoctoral students, and advanced undergraduate students from underrepresented groups. The fellowships provide opportunities for mentors to guide attendees, introduce them to other scientists, and offer career advice.
A Brazilian study found that anticonvulsant therapy can lead to cognitive disabilities in epileptic children, affecting their ability to recall information. The research suggests a need for cooperation between physicians and educators to develop strategies to mitigate these effects.
Researchers found that diabetes causes a phase shift in the heart's circadian clock, leading to changes in gene expression and potentially disrupting the synchronization between stimulus and response. This alteration may contribute to contractile dysfunction and increased risk of heart failure in patients with diabetes.
A recent study found significant dietary deficiencies in African American females with low incomes, particularly in folate, iron, calcium, and vitamin D. The study also highlighted excessive energy intake and high levels of saturated fats. To address these concerns, nutrition education is essential to promote healthier eating habits.
Researchers found that fibromyalgia patients exhibit a blunted response to exercise-induced sympathetic nervous activity, indicating normal muscle physiology. The study also revealed no increased pain or fatigue in the post-exercise period, challenging previous assumptions about the role of physical effort in exacerbating symptoms.
Researchers found that diets rich in soy protein and flaxseed can decrease total cholesterol, triglycerides, and glucose levels in obese rats. Flaxseed also showed a greater effect on various parameters than soybean, suggesting potential benefits for humans.
Researchers discovered significantly higher plasma ANP and proANP-(1-30) levels in women with primary ovarian cancer compared to healthy controls. The study suggests that these peptides may play a role in the development of malignant ascites associated with ovarian cancer.
The study found that lower levels of cigarette smoke exposure decrease NaPi-IIb cotransporter gene and protein expression, while higher smoke exposure increases its expression. This suggests a compensatory mechanism for surfactant production in smokers.
Researchers used a new type of pedometer that measures body motion to estimate total daily energy expenditure (TDEE) in sailors. The study found that the pedometer technology provided accurate results, with a 95% confidence interval of +193 kcal/day.
Researchers have identified ten new genes associated with salt sensitivity and hypertension in rats, which may help develop a treatment regimen for hypertensive patients. The study used DNA microarrays and a global gene screening tool to analyze the genetics of salt-sensitive hypertension.
Researchers have identified the first genetic loci associated with aerobic capacity in rats, revealing a complex relationship between inherited traits and exercise. The study used a genome scan to find quantitative trait loci (QTLs) linked to aerobic running capacity and found significant associations on chromosomes RNO16 and RNO8.
A study found that young African American males without hypertension have arteries with reduced capacity to expand, indicating a potential risk factor for the disease. The research also revealed decreased baroreflex sensitivity and sympathovagal balance, suggesting an increased likelihood of developing hypertension in the future.
Researchers found Tibetans retain no deterioration in physiological processes when exposed to acute hypoxia, unlike lowlanders. This discovery could lead to novel treatments for hypoxic injury and prevention of mountain sickness.
A new study found that sedentary men with higher levels of abdominal visceral fat have lower cardiovagal baroreflex gain, increasing their risk of cardiovascular disease. The study suggests that weight loss may improve cardiovagal baroreflex gain and reduce the risk of cardiovascular disease.
Researchers discovered that heparin inhibits the adhesion of sickle red blood cells to P-selectin on blood vessel walls, preventing blockages and organ damage. The study suggests that oral heparin preparations may provide a convenient and safe treatment option for patients with sickle cell disease.
A study of 101 newborns found that 40% tested positive for drugs, with cocaine and heroin being the most common. The researchers argue for more funding on rapid-screening technology and better educational outreach to prevent drug exposure during pregnancy.
Research reveals women fatigue less than men under aerobic conditions, but equally when deprived of oxygen. Efficient utilization of aerobic pathways results in reduced by-product production, leading to decreased muscle fatigue. Further study is needed to explain the mechanism behind this difference.
The American Physiological Society hosts a series of briefings on the physiology and pathophysiology of obesity, featuring renowned experts who examine gene-environment interactions, neurobiology, endocrine/metabolic consequences, and cardiovascular regulation. The conference aims to advance understanding of human health and disease.
A new study found that sustained caffeine intake counteracts the benefits of creatine supplementation, reducing muscle relaxation time and fatigue. This means that consuming high amounts of caffeine over a short period can negate the effects of creatine on exercise performance.
A study published in the Journal of Applied Physiology found that ultra-long-distance runners experience a decline in maximal voluntary force capacity due to central fatigue, but also exhibit strengthened twitch mechanical responses and unaltered M-wave characteristics.
A Harvard research team studied human running on various surface stiffnesses, finding a 12.5-fold decrease in surface stiffness led to a 12% decrease in metabolic rate and a 29% increase in leg stiffness, with support mechanics remaining unchanged.
A new study suggests that galanin, previously thought to be detrimental to Alzheimer's patients, may actually enhance acetylcholine release from remaining cholinergic basal forebrain neurons. This compensatory role could delay disease progression and inform the development of galanin antagonists as a potential treatment option.
The study examined PON1 activity in children and adolescents with high lipid levels, finding associations between certain genotypes and HDL cholesterol levels. The researchers also found that dietary fat intake increased over time, contradicting expected trends in the nutritional intervention population.
Researchers investigate whether genetics are the sole cause of high blood pressure in Hispanic populations, finding that environment plays a key role. The study reveals that physical activity and reduced smoking/salt use can help prevent high blood pressure in this demographic.
Researchers have identified key genes associated with cardiac hypertrophy, hypertension, and dilated cardiomyopathy. Genetic testing is also being developed to predict susceptibility to coronary artery disease, offering new avenues for preventive medicine.
Researchers mapped the primary auditory cortex of a pallid bat, revealing insights into the structure and function of its hearing system. The study found that neurons in the low-frequency noise-preferring region are systematically organized with respect to their sensitivity to interaural intensity differences.
A study found that blind individuals using Braille reading strategies activate areas of the brain normally reserved for vision, suggesting a novel way of utilizing occipital cortex. This activation is similar to what is observed in sighted individuals when reading print or receiving tactile stimulation.