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Legs in Biological News

Scary ancient spiders revealed in 3-D models, thanks to new imaging technique

... features of the creature, which had four pairs of legs and looked similar to a spider. In the new ... reveal that Cryptomartus hindi 's first two legs were angled towards the front of the body, which suggests that it used its legs to grab its prey before killing them. The ...

Crab claws pack strengthening bromide-rich biomaterial

... and hold prey. It also is present on the walking legs of Dungeness crabs (Cancer magister), a dining ... and are not tipped with this material. But their legs are, he said. "The next time you are eating a ... material at the tips of crab claws and legs is a new member of a class of structural ...

Mayo Clinic researchers suspect a novel gene is causing restless legs syndrome in a large family

... Mayo Clinic campus in Florida, diagnosed restless legs syndrome. This common neurologic disorder interrupts sleep because of unpleasant sensations in the legs at rest, especially in the evening, that are temporarily relieved by movement. Restless legs syndrome affects between 5 and 11 percent of the ...

Four, three, two, one . . . pterosaurs have lift off

... birdlike in many ways, such as using only two legs to take flight. Now comes what is believed ... get as big as the biggest bird." Birds use legs to launch, wings to flap. They don't get launch ... from legs. In fact, when a bird is aloft, its legs become payload, or cargo. The muscle on the two ...

Earliest animal footprints ever found -- discovered in Nevada

... creature suggests that animals walked using legs at least 30 million years earlier than had been ... you find evidence, like we did, of an animal with legs -- an animal walking around -- then that makes ... onto the soft marine sediment, because its legs only pressed shallow pinpoints into that long-ago ...

So-called 'sandfish' could help materials handling and process technology specialists

... now, it was thought that the sandfish pulled its legs in against its body, but the experiments revealed that it actually moves its legs back and forth in a fixed pattern."This seems ... leg.The time displaced-movements of the lizard's legs according to this principle add up to a very ...

Photo reveals rare okapi survived poaching onslaught

... NEW YORK (September 10, 2008)A set of stripy legs in a camera trap photo snapped in an African ... from the Wildlife Conservation Society. The legs belong to an okapia rare forest giraffewhich ... to 6 feet at the shoulder, the okapi has striped legs that give the animal a superficial resemblance to ...

At risk for peripheral arterial disease? Simple quiz provides key so you can circulate better

... in three who are over the age of 50 develop PAD). legs for Lifea community health and public information ... results with his or her doctor. Additionally, legs for Life offers a free national screening program ... radiologist Timothy P. Murphy, M.D., legs for Life chair. "Older men and women need to be ...

American Chemical Society's Weekly PressPac -- July 30, 2008

... FOR IMMEDIATE RELEASE Perfectly proportioned legs keep water striders striding Langmuir The ... are reporting that the insect's long, flexible legs have an optimal length that keeps it afloat. ... water-repellant structure of the water strider's legs and how it allows them to efficiently scoot and ...

Mutation may cause inherited neuropathy

... Symptoms include pain in the hands and arms, legs and feet--sometimes constant and quite severe--as ... 1, Dync1h, led to movement defects in the hind legs of mice. These defect resembled human ... axons, for example those that innervate the legs and feet, says Popko. It has been previously ...

Restless legs syndrome affects nearly 2 percent of US/UK children

... Restless legs syndrome is a common problem in children 8 years ... Pediatrics. This study suggests that restless legs syndrome is common and troublesome in children ... Foundation Hospital in Urbana, Ill. Restless legs syndrome (RLS) is a neurological sleep disorder ...

Tracking feline memories on the move

... an obstacle with its front legs, how do its hind legs know what to do" A new study in the August 21st ... that the long-lasting memory for guiding the hind legs over an obstacle requires stepping of the ... for a long time and stepped up with their hind legs to clear the necessary height. However, if the ...

Trading energy for safety, bees extend legs to stay stable in wind

... themselves against wind and turbulence by extending their sturdy hind legs while flying. But this approach comes at a steep cost, increasing ... at high flight speeds, negotiating the turbulence by extending their rear legs while in flight. "This increases the bees' moment of inertia and ...

UF scientist tapped by Howard Hughes Medical Institute to pursue 'best ideas'

... as hands on the ends of arms at the shoulders, and feet on the ends of legs protruding from the trunk. His research led him to the Hox family of ... form fingers and toes, and identified the molecular basis for the loss of legs during whale evolution. The group has also published widely on the origin ...

Researchers uncover world's oldest fossil impression of a flying insect

... moved once it landed on a surface, as well as its stance, position of its legs and details about its abdomen and thorax. The impression is about three ... imprint that it has a very squat position when it lands," Engel says. "Its legs are sprawled and its belly is pressed down. The only group that does that ...

Prosthetic vein valve designed to direct blood flow shows promising pre-clinical results

... valve leaflets allows blood to flow the wrong way, causing swelling in the legs and ankles." Ku is leading a research team that has developed a ... option because finding a suitable donor valve in one of the patient's legs can be difficult, according to Ku. "Previous studies have ...

Phoenix mission to Mars will search for climate clues

... the Phoenix Mars Mission space vehicle will be touching down on its three legs to make a soft landing onto the northern Mars terrain called Green Valley. ... Green Valley with the aid of a parachute, retro rockets and three strong legs with shock absorbing footpads to slow it down. That's sol (a Martian ...

Promising new nanotechnology for spinal cord injury

... six weeks the animals had a greatly enhanced ability to use their hind legs and walk. The research is published today in the April 2 issue of the ... -- up the spinal cord to the brain (the sensory axons) and down to the legs (the motor axons.) "Not everybody realizes you have to grow the fibers up ...

Darwin was wrong about the wild origin of the chicken

... researchers mapped the genes that give most domesticated chickens yellow legs and found to their surprise that this genetic heredity derives from a ... is why humans bred this characteristic. Maybe chickens with bright yellow legs were seen as being healthier or more fertile than other chickens, or were ...

Was ability to run early man's Achilles heel?

... The earliest humans almost certainly walked upright on two legs but may have struggled to run at even half the speed of modern man, new ... is a virtual robot where we can activate muscles and get it to move its legs in a physically realistic fashion; the tricky bit is getting it to ...

Inside the brain of a crayfish

... antennae. Look closer, and you will see them feeling around with their legs and flicking their antennules the small, paired sets of miniature feelers ... that also could indicate the presence of food, a fling or danger. The legs also have receptors that detect chemical signatures, preferably those ...

Knee injuries may start with strain on the brain, not the muscles

... to combat fatigue fallout. In a related paper, McLean's group again tested the single leg landings of 13 men and 13 women after working the legs to fatigue. While both men and women suffer an epidemic of ACL injuries, women are two to eight times likelier to tear this ligament than men while ...

Study explains potential failure of oral contraceptives with obese women

... prescribe lower-dose oral contraceptives to obese patients in an effort to decrease their risk of venous thrombosis. These are blood clots in the legs or elsewhere that can increase the risk of stroke and heart attacks. The study was done with 20 women of ages 18 to 35, all of them healthy and ...

Down Under dinosaur burrow discovery provides climate change clues

... that they were made by small ornithopod dinosaurs herbivores that were prevalent in the region. These ornithopods stood upright on their hind legs and were about the size of a large, modern-day iguana. "It's fascinating to find evidence connecting a type of behavior between dinosaurs that are ...

Evolution: Crabs go deep to avoid hot water

... live largely undiscovered. The fraction that we have found includes some weird and wonderful examples - Paralomis seagrantii has its eight walking legs and claws entirely covered in long fur-like setae; while related group Lithodes megacanthus grows to lengths of 1.5 metres, and has 15-20-cm long ...

Triggering muscle development -- a therapeutic cure for muscle wastage?

... Scientists in the UK and Denmark have shown that if elderly men were given growth hormone and exercised their legs showed an appreciable muscle mass increase. Dr. Geoff Goldspink (Royal Free and University College Medical School, UK) says: "This raises the ...

Oscar Pistorius: Previously confidential study results released on amputee sprinter

... with the ground 14% longer on each sprinting step He spends 34% less time in the air between steps He takes 21% less time to reposition (swing) his legs between steps. In summary, the team concluded that Pistorius' physiology (energy cost and fatigability) is generally similar to that of ...

New research shows dinosaurs may have been smaller than we thought

... on pillars," says Birchard. "The bigger the building, the larger the pillars must be to support the weight of the building. In the same way, the legs of an animal are the pillars supporting its body." According to Birchard, this new research suggests that some dinosaurs were much more slender ...

Beetle shell inspires brilliant white paper

... however, is created through a random structure, which produces 'scattering' of all colours simultaneously. Studies of the beetle's body, head and legs showed them to be covered in long flat scales, which have highly random internal 3D structures. These irregular internal forms are the key to its ...

Wildlife Conservation Society supports world's first study of egg-laying mammal

... groups of which give birth to live young. Echidnas resemble anteaters with long course hairs and spines. They are powerful diggers and possess short legs with long claws. The snout of the echidna ends in a tiny mouth with no teeth. Long-beaked echidnas feed on insect larvae, worms, and other ...

A new mouse model provides insight into genetic neurological disorders

... a protein-making molecule, a mouse was made to help understand nervous system diseases that impair feeling and cause paralysis of the arms and legs in humans. Scientists have created a mouse to help understand human neuronal diseases that impair a patient's ability to feel and to move their ...

Protein identified as critical to insulating the body's wiring could also become treatment target

... arms require proper insulation, called myelin, composed mostly of lipids and some proteins. Axons that transmit quick messages such as telling legs to walk need a lot of insulation. Sensory nerves such as those on the fingertips that prompt retraction from a hot stovetop need less. "In any ...

Bone deformities linked to inbreeding in Isle Royale wolves

... or lower back, and 33 percent display a specific deformitylumbosacral transitional vertebraewhich can cause full or partial paralysis of the rear legs and tail, as well as back pain. It is a condition also seen in domestic dogs. Other malformations were found in the wolves as well. For the last ...

Research links evolution of fins and limbs with that of gills

... image duplicate of the structure as the embryo develops. According to the researchers, the genetic circuitry that patterns paired appendages (arms, legs and fins) has a deep evolutionary origin that actually predates the origin of paired appendages themselves. "These findings suggest that when ...

American Chemical Society's weekly PressPac -- March 11, 2009

... and planes. Scientists have often turned to nature for inspiration. One source: The water strider, whose highly water-repellant (superhydrophobic) legs allow this insect to literally scoot across water surfaces at high speeds. But researchers still have not found a practical way to apply this ...

Young dinosaurs roamed together, died together

... an ancient tragedy. Two of the skeletons fell one right over the other. Although most of their skeletons lay on a flat horizontal plane, their hind legs were stuck deeply in the mud below. Only their hip bones were missing, which was likely the handiwork of a scavenger working over the meatiest part ...

'Seeing' stem cells helps in fight against peripheral arterial disease

... Administration. The future hope is to use adult stem cells extracted from a healthy donor's bone marrow and inject the cells into the patients' legs where circulation problems exist, stimulating the growth of new or more blood vessels in the leg, thus improving circulation, said Wacker. Previous ...

Simple test helps predict heart attack risk

... disease, as well as for managing established PAD," said Murphy. ABI, used to diagnose PAD, is a painless test that compares the blood pressure in the legs to the blood pressure in the arms to determine how well the blood is flowing and whether further tests are needed. Elevated results for plasma ...

'Freaks' help scientist unravel nature and nurture

... In 1940, a Dutch goat born without front legs learned to walk upright. So did Faith, a two-legged dog in Oklahoma. Johnny Eck, a "half-man" born without legs, grew naturally into a ...

Famous fossil Lucy scanned at the University of Texas at Austin

... arms versus how she used her legs. These new data will allow us to examine the theory that she climbed about in the trees, as well as walked on two legs when she was on the ground." Although Lucy is small (about one meter tall), her contribution to science has been large. She represents a distinct ...
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