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Tag: "physiological" at biology news

Modeling the restless brain

...ics approaches, which use extensive anatomical and physiological data sets to describe the macacque's brain, allowed Sporns and Honey to collect data on all the activity that occurred during their simulations. Sporns said he wants to create a similar large-scale computer model of the human brain that will allo...

ASU research shows connection between testosterone, dietary antioxidants and bird coloration

...ur veggies and good things will happen. In a new physiological study of birds, a researcher at Arizona State Univ...Most previous studies of this sort have focused on physiological or even genetic links between testosterone and health. He adds that it is worth considering the impl...

In nature, proteins sweep up nanoparticles

...hen scavenged by zinc sulfide. Or there could be a physiological reason. Perhaps the bacteria use the protein to sequester their sulfide waste product, which could otherwise accumulate and entomb the bacteria or interfere with their cellular machinery. Think of it as trash pickup at the nanoscale. Regardless, the ...

Research finds that circadian rhythms dominate all life functions

...iod of about 24 hours and regulate timing for most physiological functions and behaviors such as sleeping, eating and activity. As a checks-and-balances procedure, Ptitsyn analyzed the sets of data with several mathematical approaches to achieve the same results. The research also shows that gene oscillation is ...

Putting feelings into words produces therapeutic effects in the brain

...strengthen this brain region. Does therapy lead to physiological changes in the right ventrolateral prefrontal cortex" Lieberman, UCLA psychology professor Michelle Craske and their colleagues are studying this question. Combining Buddhist Teachings and Modern Neuroscience After the participants left the b...

Better insight into brain anatomical structures

...n help to make these images even clearer and allow physiological processes to be followed in real time. Conventiona...iple should allow other disease-related changes or physiological systems to be visualized by using the appropriate antibodies....

'Virtual Patient' to simulate real-time organ motions for radiation therapy

...and air volume change that are affected by several physiological factors over the course of the radiation treatment." Real-time simulations could allow doctors to spot the small fractions of time when the lungs, liver, kidneys, and eventually the heart, are stationary relative to the external radiation beams. T...

Hearts of male and female rainbow trout are different

..., ventricle strips were electrically-stimulated at physiological rates and temperature in tissue baths containing buffer, with (a) glucose and (b) glucose + DCA (dichloroacetate, an activator of PDH and a therapeutic drug used to treat human heart disease and cancer), or (c) glucose + NaCN under oxygenated and hyp...

pHLIP, a novel technology to locate and treat tumors

... be acidic are a target for pHLIP. “Acidosis is a physiological marker of many diseases ?and pHLIP feels acidity,?said Reshetnyak. “Therefore, pHLIP could also be used for monitoring of disease development and therapeutic outcomes. It might play very important role in the study of arthritis, ischemia and stroke.?...

Nitric oxide: Key to cardiovascular and pulmonary function and drug effectiveness

...that it demonstrates how two of the most pervasive physiological systems -- G-protein coupled receptors and nitric oxide -- come together to influence one another," said Erin Whalen, Ph.D., who spent six years focusing on the link between the two biological systems. Whalen is a postdoctoral fellow in the laborator...

Intelligent materials to regenerate bone tissue

...ary for the implant to provide both functional and physiological properties of the damaged item. Given this hypothe...ing genes, as well as respond appropriately to the physiological and biological changes, both internal and external, of that system. Also necessary are size an...

To sleep, perchance to dream: New insight into melatonin production

...ythm (the roughly-24-hour cycle around which basic physiological processes proceed). Normally, melatonin production is inhibited by light and enhanced by darkness, usually peaking in the middle of the night. Melatonin's expression pattern is mimicked by a protein called AANAT, which is a key enzyme in the melaton...

Stanford-led study closes in on genes that may predispose some people to severe depression

...ely mixed in as well, things such as non-genetic physiological problems or psychological traumas. Some 10 to 15 percent of people suffer from severe depression at some point in their lives, and 3 to 5 percent have it more than once. Women are twice as likely to develop depression as men, although the reas...

Mutation improves memory, may lead to memory-enhancing pill

...these data strongly support the notion that, under physiological conditions, a decrease in eIF2a phosphorylation constitutes a critical step for the activation of gene expression that leads to the long-term synaptic changes required for memory formation," the researchers concluded. "These findings also raise the i...

How appetite-stimulating brain cells work overtime during fasting

...olism. Previous studies had also established a key physiological role for the active thyroid hormone, triiodothyronine (T3), in the regulation of body temperature by heat-generating brown fat. The molecular underpinning of heat production, or thermogenesis, in brown fat is the activation of mitochondrial uncoup...

Imaging techniques permit scientists to follow a day -- or four -- in the life of a cell

...vement and growth of cells are critical for normal physiological processes, and--when perturbed--can result in negative outcomes such as tumor formation. Understanding how live cells function is therefore invaluable for molecular and cellular biologists, and advanced techniques to visualize cells in action are of ...

Mimicking how the brain recognizes street scenes

... output stimuli ?according to neural recordings in physiological labs. Like the brain, the model alternates several times between computations that help build an object representation that is increasingly invariant to changes in appearances of an object in the visual field and computations that help build an objec...

How fish species suffer as a result of warmer waters

...h Sea. The goal of the study was to identify those physiological processes exhibiting the most immediate response to warming in the field. Comparing ecological field data with laboratory investigations of the eelpout's physiology, the authors were able, for the first time, to demonstrate a direct link between tem...

Wired for sound: How the brain senses visual illusions

...ly than we thought before," said Mishra. "We show physiological evidence that visual and auditory stimulation might not be processed separately, then merged together, as previously assumed, but that an almost-simultaneous integration of the sensations may actually take place in the brain." The UCSD scientists ...

Scripps research team discovers a chemical pathway that causes mice to overeat and gain weight

...t inflammatory mediator that controls a variety of physiological functions including fever, fertility, and blood pressure. The most common anti-inflammatory and analgesic treatments like ibuprofen are aimed at reducing PGE2 signaling at all four prostaglandin receptors. The absence of EP3 receptors has long bee...

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