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Movement in Biological News

1-finger exercise reveals unexpected limits to dexterity

... maximal voluntary downward force would scale with movement speed. Surprisingly, maximal force was independent of movement speed." The observation challenges theories ... significant differences between slow, and fast movement speeds even though ...

US-Mexico border wall could threaten wildlife species

... border with Mexico could significantly alter the movement and "connectivity" of wildlife, biologists say, ... security wall could have a bigger impact on the movement of bighorn sheep, which range widely among the ... fence, especially species that have low rates of movement among habitat patches." Epps, who is an ...

Protein regulates movement of mitochondria in brain cells

... that plays a critical role in regulating the movement or transport of mitochondria in neuron cells. ... they dubbed hypoxia upregulated mitochondrial movement regulator (HUMMR), is produced in a state of low ... Understanding the mechanisms that regulate the movement of mitochondria may help scientists identify how ...

Brain-computer interface, developed at Brown, begins new clinical trial

... the brain signals that ordinarily accompany movement and to translate those signals into actions on a ... like moving a cursor on the screen, or the movement of a robotic or prosthetic limb." A previous ... a computer cursor by simply thinking about the movement of their own paralyzed hand. "We learned an ...

Grouping muscles to make controlling limbs easier

... more than 30 muscles in your arm, controlling movement -- whether it's grasping a glass or throwing a ... muscle synergies, the researchers could control movement without degrading performance. "Having all ... to patients. "The end goal is to restore movement in people who are paralyzed," he said. ...

Spring fishing season arrives... and with it, amphibian diseases

... for understanding the consequences of unregulated movement of amphibians and their pathogens," says Collins. ... is narrowed to several distributors, the movement of animals from these dealers could be stopped," ... he says. "Random monitoring of pathogen movement through the bait trade may help limit the spread ...

Flight of the bumble (and honey) bee

... Although several studies have focused on pollen movement among cucurbits, the plant family that includes ... of pollen flow showed a definite pattern of bee movement and gene migration in watermelon. "Although we detected pollinator movement that was strongly directional in both directions ...

The continents as a heat blanket

... the Earth's mantle, a process similar to the movement of warm water in a cooking pot. This heat-driven ... surface, this process leads not only to plate movement but also to drifting of the continents floating ... describing the interaction between the convective movement in the Earths mantle and the continental drift. ....

Researchers advance knowledge of little 'nano-machines' in our body

... have developed a novel method to detect the movement of single proteins that control the ion exchange ... proteins open and close and thereby control the movement of ions between the cells and their environment, ... seek to better understand the structure and movement of ion channels because the malfunctioning of ...

New movement models tested at the Smithsonian in Panama

... what they are up to. However, general theories of movement are lacking. In a special feature on movement Ecology in the journal Proceedings of the ... , researchers present integrative models for movement of organisms as diverse as gut bacteria, tree ...

How do bacteria swim? Brown physicists explain

... Imagine yourself swimming in a pool: It's the movement of your arms and legs, not the viscosity of the ... Nov. 25), the researchers show how this microbe's movement is affected by drag and a phenomenon called ... which helps explain the bacterium's nonlinear movement through a fluid. What Tang and his team found, ...

Acoustical Meeting, Nov. 10-14, 2008 in Miami, Florida

... who have undergone laryngectomy, rhythm and movement disorders, visualizing the sound of musical ... 9) Understanding Rhythm may Help People with movement Disorders 10) Virtual Harmony: ... 9) UNDERSTANDING RHYTHM MAY HELP PEOPLE WITH movement DISORDERS The ability to move rhythmically to ...

Rong Li Lab probes mechanism of asymmetry in meiotic cell division

... during meiosis in oocytes. By tracking chromosome movement in live mouse oocytes, the team discovered that ... by which the actin cytoskeleton drives chromosome movement in mammalian meiotic oocytes," said Hongbin Li, ... author on the paper. "Failure in the chromosome movement will lead to failed oocyte maturation and ...

Scientists identify a molecule that coordinates the movement of cells

... called ACF7, helps regulate and power this movement from the inside - findings that could have ... can not only access energy stores to power this movement from within but also coordinate it by linking two ... directed manner. They also noticed that cellular movement slowed, suggesting that the sticky adhesive sites ...

Ocean floor geysers warm flowing sea water

... An international team of earth scientists report movement of warmed sea water through the flat, Pacific Ocean floor off Costa Rica. The movement is greater than that off midocean volcanic ... are surprisingly warm as well. Finding so much movement in a bland area of the ocean was surprising. ...

Colorful spy tactics track live cells supporting cancerous tumors

... is allowing scientists to better understand the movement of cells in the area around tumors, also known as ... methods of laser microscopy to track the movement of live cells in a mouse model of breast cancer. ... beyond studying cancer, such as watching cell movement in other tissues and organs, both diseased and ...

Carnegie Mellon MRI technology that non-invasively locates, quantifies specific cells in the body

... which allows us to track their location and movement and to count the apparent number of cells ... College of Science. The ability to track the movement and eventual location of specific immune cells is ... In this way, we could use MRI to visualize the movement of the therapeutic cells in the patient to ...

Discovery of a mechanism that regulates cell movement

... of the CSIC, reveal a mechanism that controls the movement of cells in a tissue by regulating cell adhesion. ... Drosophila at IRB Barcelona, explains that "when movement starts, the levels of this protein in the cells ... the researchers induced or blocked cell movement by modifying the elements that control the ...

Researchers catch ion channels in their opening act

... one-billionth of a meter in ion channels. This movement is critical to how these tiny pores in the cell ... the oily membranes of the cell. They regulate the movement of charged particles, called ions, into and out ... channel to open or close. One model for the movement of the voltage sensor suggests that it moves up ...

Climate change hastens extinction in Madagascar's reptiles and amphibians

... 30 species of amphibians and reptiles. Uphill movement is a predicted response to increased ... records and climate change simulations, the movement of animals could be linked to temperature ... decade, which corresponds to an expected upslope movement of 17 to 74 meters (59 to 243 feet). Raxworthy's ...

Researchers observe spontaneous 'ratcheting' of single ribosome molecules

... transfer (FRET) to observe in real time the movement of the ribosomal subunits that is essential for ... back and forth at a fairly rapid rate. And that movement is not just some random movement, but it's the most important movement of the ribosome for its locomotion." Future ...

Ecological globalization

... are constantly exchanging materials through the movement of air in the atmosphere, the flow of water in ... been connected via a common atmosphere and the movement of water, says Debra Peters, an author in the ... also becoming highly interconnected through the movement of people and the transport of goods locally to ...

Sudden Oak Death pathogen is evolving, says new study that reconstructs the epidemic

... areas are infested. These findings suggest that movement of infected plants between different regions ... The researchers found that the vast majority of movement occurred within 200 to 300 meters. However, ... noted that current regulations restrict the movement of known host plant material from natural areas ...

American Chemical Society's Weekly PressPac -- March 26, 2008

... synthetic microcapsules can trigger and direct movement of these capsules. Their study is scheduled for ... of the empty capsule, which in turn caused the movement of the filled signaling capsule. The same ... into futuristic nanomachines to help direct their movement through the body or through fuel cells, the ...

Study suggests new way to screen infants for fetal alcohol syndrome

... system, were measured in the first bowel movement of the newborns. The babies were then given ... with higher levels of FAEE in their first bowel movement were found to be at risk for developmental ... the levels of FAEE in an infants first bowel movement could be a useful method for identifying children ...

Invasion of the cane toads

... movement, but also by the evolution of higher movement rates. Natural selection might cause the evolution of increased movement rates in individuals at the edge of a species' ... environmental and genetic variation affects the movement rates of invading populations will generate ...

'Smart' flower bulbs pull themselves to deeper ground

... the ground, but our research proved that this movement occurs.", explained Leopold. Leopold and the ... plants for decades, but had never focused on bulb movement in soil. The duo was interested in working on the ... the root and advancing toward the root tip. The movement function occurs in shallowly planted materials, ...

Northwestern study looks at sensing, movement and behavior

... in any animal the three-dimensional volumes for movement and sensation. They showed that the knifefish is ... stop, said MacIver. They have evolved an amazing movement system to match their omnidirectional sensing ... method of quantifying and comparing sensing and movement volumes, have given researchers a good place to ...

Beginning scientists receive presidential awards

... of neuroscience, studying how the brain plans movement and how a stroke damages a person's motor skills. ... a prototype robotic system that is assessing the movement of stroke patients and helping him fine-tune his ... applied by stroke patients and help direct the movement of those with coordination difficulties. "As ...

Dominant cholesterol-metabolism ideas challenged by new research

... been knocked out. Exacting measurements of the movement of various phospholipids across the membrane of ... or deletion of ABCA1 had any effect on the movement of PS to the cell surface in apoptotic cells," ... hypothesis that the ABCA1enzyme catalyzes the movement of PS across the cell membrane to the outer ...

Bursts of waves drive immune system 'soldiers' toward invaders

... how this protein might be organizing cell movement - an idea that our subsequent experiments ... Similarly, faulty regulation of white blood cell movement plays a role in heart attack - another promising ... they have discovered in neutrophils also controls movement and shapes changes in other cells and organisms. ...

Abnormal brain circuits may prevent movement disorder

... MANHASSET, NY -- Most people who carry a genetic mutation for a movement disorder called dystonia will never develop symptoms, a phenomenon that ... with inherited dystonia are normal at autopsy and the exact cause of their movement abnormality is unknown. David Eidelberg, MD, the senior author of the ...

A crystal ball for brain cancer?

... -- before the patient ever starts treatment. By linking high water movement in tumors to positive drug response, the UCLA team predicted with 70 ... within six months and which would not. They detected greater water movement in the tumors of those persons who later responded best to Avastin. ...

'Microfluidic palette' may paint clearer picture of biological processes

... a new paper,* is that the gradients are generated by diffusionthe gentle movement of matter from one point to another by random molecular motion. ... application of the microfluidic palette is the study of chemotaxis, the movement of cells along a chemical gradient, a biological phenomenon that plays a ...

Scientists track impact of DNA damage in the developing brain

... source of neurological problems in humans. The cerebellum coordinates movement and balance. The cerebellar interneurons fine tune motor control. ... other movement. AOA1 is among the most common form of certain inherited movement disorders in Japan and Portugal. McKinnon said those reports sparked new ...

Spontaneous assembly

... membrane proteins are able to assemble into clusters that direct cell movement to select chemicals in their environment. Their results provide valuable ... to the E.coli chemotaxis network of signaling proteins, which direct the movement of the bacteria towards or away from sugars, amino acids, and many other ...

New method separates cancer cells from normal cells

... cells tend to move more than their non-metastatic variants but this movement is poorly understood. Scientists are studying cancer cells intently with ... wide. The asymmetric obstacles inside these channels direct cell movement along a preferred direction. Details are published online by the ...

Pliable proteins keep photosynthesis on the light path

... binding proteins. The research team had previously demonstrated that the movement of the reaction center proteins during photosynthesis facilitates the light-driven movement of electrons between molecules in the reaction center, helping the plant ...

American Chemical Society's weekly PressPac -- April 29, 2009

... RELEASE Toward giving artificial cells the ability for sustained movement Journal of the American Chemical Society Scientists in Japan ... years to find a method for producing oil droplets that undergo controlled movement from one point to another. Despite identifying several promising ...

Satellites show how Earth moved during Italy quake

... Italian Space Agency's COSMO-SkyMed, scientists have begun analysing the movement of Earth during and after the 6.3 earthquake that shook the medieval town ... A complete set of coloured bands, called 'fringes', represents ground movement relative to the spacecraft of half a wavelength, which is 2.8 cm in the ...
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