Tag: "movements" at biology news
Uncovering the molecular basis of obesity
...ans. Spontaneous physical activity, subconscious movements
we make such as fidgeting while working at the computer, and food intake are two crucial factors regulating our body weight. Both are controlled by the same part of the brain, called hypothalamus, and they are intrinsically linked. When we are hungry...
Math that powers spam filters used to understand how brain learns to move our muscles
... or less predictable guesstimates of human muscle movements
to explain how the brain draws on both what it rec... it possible to predict the best ways to teach new movements
and help design physical therapy regimens for the disabled or impaired. Reza Shadmehr, Ph.D., pro...
Cold Spring Harbor Protocols features methods to understand embryos, clones, stem cells
...eller explants, contain cells that undergo dynamic movements
and interactions during embryogenesis. The slices allow scientists to observe and test morphological and molecular changes that occur in a normally opaque embryo, and to see whats happening several layers deep into the embryo. The protocol is freel...
Common treatment for methamphetamine overdose may damage brain cells
... the loss of cells results in abnormal involuntary movements
resembling Tourette's syndrome and Huntington's disease." ...
Landmark study identifies large number of new proteins implicated in Huntington's disease
...D, which is typically characterized by involuntary movements
and dementia. The disease slowly diminishes a persons ability to move, think and communicate. Those affected eventually become totally dependent on others for their care and usually die from complications such as choking, heart failure or infection. ...
Scientists offer new view of photosynthesis
...cessfully captured the contribution of the protein movements
to the rate of the reaction. The scientists were ...e experiments to help explain what sort of protein movements
may be occurring in the reaction center and then try to match these findings with current computer m...
A matter of force
...ules into a pulling force can explain the specific movements
of the mitotic spindle. The same principle might apply also to asymmetric cell division in other organisms and contexts, such as stem cell renewal. The cellular components involved in such divisions have been conserved throughout evolution making ...
Urbanization favors sedentary males
...city and forest environments. They monitored their movements
at night and during the day and measured body fat, an indicator that the bird is preparing for migration. The researchers also looked at sexual maturity, to see if migratory disposition had an impact on the seasonal timing of reproduction. Parteck...
National Academy of Sciences elects 2 Brandeis University scientists to membership
...cuits in lobsters and crabs that generate rhythmic movements
to understand how neuromodulators influence circuit behavior, and most recently to understand the limits of variability across individual animals. Miller has spent his research career studying the molecular underpinnings of the generation of ele...
Researchers create interactive map with Google technology to track avian flu spread
...ers to fly virtually around the planet and analyze movements
and changes in the genomes, or genetic blueprints, of known avian flu sub-strains that have been sequenced since the virus was first detected in Guangdong, China, in 1996. The researchers used the novel technology to chart the spread of H5N1 throu...
Motile Cilia go with the flow
...s up to 200 cilia, which have to co-ordinate their movements
to orient their effective stroke in the same direction as their cellmates and all the cilia on neighboring cells. Cilia movement is driven by an array of longitudinal microtubules arranged in 9 doublets around a central pair. A basal body anchors the...
Migratory birds: Innocent scapegoats for the dispersal of the H5N1 virus
...iruses was due to human activities, in particular, movements
of poultry or their products. This commercial scen... overwhelmingly supports the hypothesis that human movements
of domestic poultry have been the main agent of global dispersal of the virus to date. The occurrenc...
News tips from the Journal of Neuroscience
...chael S. A. Graziano It comes as no surprise that movements
in monkeys are accompanied by single neuronal acti...lly confounding contribution of overly constrained movements
in highly trained animals. The authors measured spontaneous arm movements
in untrained monkeys using...
When your brain talks, your muscles don't always listen
...he repeated contraction of muscles is essential to movements
such as walking," Knight said. "However, our muscles have a reduced capacity to contract or 'twitch' as we grow older. We lose fast-twitch muscle fibers as we age." However, there are steps we can take to preserve this critical motor capacity, acco...
Novel salamander robot crawls its way up the evolutionary ladder
...terrestrial locomotion? How are the limb and axial movements
coordinated? And how is a simple electrical signal...y evaluated and also to verify that the generated movements
are close to those of a real salamander." This research may ultimately point to a way to gain bett...
Tracking sperm whales and jumbo squid
...ice would transmit recorded data about the animals movements
to an orbiting satellite. Jumbo squid also were abundant, with numerous small fishing boats hauling in a total catch of about 10,000 squid per night throughout the six-day study. Captured squid were outfitted with a pop-up archival transmitting tag...
In Iran, cheetahs collared for the first time
...vast areas for their survival. Understanding their movements
as they travel between reserves is one of the first steps in establishing a plan to secure and connect the few remaining populations of this incredible animal." Once ranging from the Red Sea to India, the Asiatic cheetah today is hanging on by only t...
News tips from the Journal of Neuroscience
...n place to assist seizure localization. Voluntary movements
of the tongue, hand, or other body parts produced ... ranges. In the low-frequency band (LFB) (832 Hz), movements
reduced the signal amplitudes at 2030 Hz, whereas in the high-frequency band (HFB) (76100 Hz), movem...
How do marine turtles return to the same beach to lay their eggs?
...ow they detect the ocean currents: are the turtles movements
controlled by the currents or can they use them to...t for ocean drift in plotting their course. So the movements
recorded by the satellite are a combination of deliberate action by the turtles and the effect of cu...
Lizards shout against a noisy background to get points across
...he background, the faster and more exaggerated the movements
of the lizards. Anole lizards are interesting to evolutionary biologists because different species are found on different islands throughout the Caribbean. The lizards are not closely related -- they are separated by 30 million years of evolution -...
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