Tag: "leg" at biology news
The frontier of microelectronics: Building nano-machines, part by part
...at a football game." Ellenbogen is fine-tuning the leg
and motor designs of the test chip, and the plan is to further refine these before moving on to make six-legged insect-like "walkers" that would only be a fraction of the size of the test chip: 3x5 millimeters, no larger than a small housefly. The ...
Cell transplantation could restore cardiac function after heart attack
... undifferentiated stem cells transplanted from his leg
had evolved into well developed skeletal myotubes with a preserved contractile structure. Lead author Albert Hagge from Hopital Europeen Georges Pompidou, Paris, France, comments: "Irrespective of the mechanism, these results lend support to the use...
Multiple factors affect flight power curves among species
...n comparison, humans have 45 muscles in the thigh, leg
and foot region alone, most of which are active during locomotion. The researchers established mechanical power curves for cockatiels (Nymphicus hollandicus) and turtledoves (Streptopelia risoria) by measuring the wing and body movements as the birds...
For spinal cord injury patients, new insights for rehabilitation therapy
...ric oxide release; (2) after deconditioning of the leg
muscles, oxygen demand will be low, and oxygen del...ted poor wound healing are suggestive of a reduced leg
blood flow and possibly of increased vascular resistance. A New Study This apparent conflict betwe...
Scientists hone in on cause of amphibian deformities
...d salamanders. It is less relevant to the range of leg
deformities seen in nature, and does not lead to t...atode appears to cause a significant amount of the leg
deformities in amphibians, as it works through a complex ecological cycle that at various times incl...
Supervised exercise program is an effective remedy for cramping leg pain
...g the benefits of exercise in people with cramping leg
pain, the most common symptom of peripheral arteri..., should walk until they reach a moderate level of leg
pain and then continue for several minutes," says Kerry J. Stewart, Ed.D., Hopkins' director of clin...
From the bone of a horse, a new idea for aircraft structures
...ave recreated part of a unique bone in the horse's leg
with an eye toward lighter, stronger materials for...acecraft. The third metacarpus bone in the horse's leg
supports much of the force conveyed as the animal moves. One side of the cucumber-sized bone has a p...
A new twist on an age-old problem: Making knee replacements last
...eotomy, which involves realigning one of the lower leg
bones to redistribute loads on the knees of patien... educated guess about how much to rotate the lower leg
bone, Fregly said. By recording how patients walk normally and with heel wedges that approximate the...
Coils slash death/disabilty from brain aneurysms
...g, a catheter is inserted through an artery in the leg
up into the brain to fill the aneurysm there with tiny platinum coils. The coils are like "miniature slinkies that are folded gently into the aneurysm like a ball of yarn one by one to stop the bleeding," says Murphy. Noting that the procedure also...
Cancer pain control possible with gene therapy
... combination of amino acids. Mice with tumors in a leg
bone that received injections with the altered virus showed a substantial and significant reduction in pain-related behavior, the authors report. "Although we have many powerful medications to treat pain, unwelcome side effects of these drugs limit o...
Needle-free blood and tissue measurements
... variables, we can take measurements on the arm or leg
or even sew sensors into clothes." The final step will be to develop clinical guidelines for the measurements, so that physicians know the significance of the readings. "Tissue pH and oxygenation are new medical parameters, so we have to determine sp...
African-Americans more likely to lose limbs due to vascular disease than other groups
...s or improve the quality of life for patients with leg
pain due to vascular insufficiency....
Queen's invention connects brain functioning to limb control
...o help understand the role of the brain in arm and leg
movement will dramatically improve the assessment and rehabilitation of stroke and spinal cord victims. It will also help lay the groundwork for development of neural prostheses that can re-activate paralyzed limbs. Dr. Stephen Scott's unique mathema...
Climate and cholera: An increasingly important link
...h symptoms that may include diarrhea, vomiting and leg
cramps, is caused by the bacterium Vibrio cholerae. People usually get the disease by eating or drinking contaminated food or water. The greater role of ENSO in cholera dynamics probably reflects known changes in ENSO itself, the researchers believe...
Tomorrow's super robots may owe their mobility to a cockroachs legs today
...ns. One fertile area for biomimetic design is the leg
of walking or hopping robots, where leg
compliance is especially important. One method for manufacturing such robots is Shape Deposition Man...
Estrogen combined with calcium and vitamin D may prevent tooth loss
...ensity of the lumbar spine and the left femur, the leg
bone attached to the hip. Women taking estrogen had a significant increase in bone mineral density in the femur (3.59 percent), whereas their placebo counterparts did not (.22 percent). Women in the estrogen group gained 1.01 percent bone mineral den...
Human ancestor Australopithecus did indeed walk upright
...The pelvis is tilted in humans to give leverage to leg
muscles that extend the legs backward during bipedal striding and running. However, unlike modern humans, Australopithecines have relatively small vertebral bodies and exhibit much pathology in these vertebral bodies. This suggests that while the bac...
Stanford scientist seeks participants in NASA hypergravity study
...me when they return to Earth, while others undergo leg
muscle atrophy - a classic case of ``use it or lose it,`` Cohen noted. During a typical shuttle flight, astronauts spend less than a half hour in hypergravity conditions - up to 3.2 G during takeoff and 1.4 G on re-entry. Most of their journey is spe...
Human running on surfaces of different stiffnesses
... (March 12, 2002) -- Bethesda, MD -- The loss of a leg
or severe leg
injury can be devastating. In addition, even the most advanced prosthetic and orthotic devices have ...
Tyrannosaurus rex probably could not run fast, scientists say
...ers created a computer model to calculate how much leg
muscle a land animal would need to support running...iomechanical parameters - posture, center of mass, leg
weight and total weight - the researchers can quickly quantify the physical forces exerted during mo...
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