الثلاثاء، 15 أكتوبر 2013

ScienceDaily: Health & Medicine News

ScienceDaily: Health & Medicine News

Stepping out in style: Toward an artificial leg with a natural gait

Posted: 14 Oct 2013 12:57 PM PDT

Humans rarely walk the straight and narrow; something's always in the way. So scientists are developing a computer-controlled artificial limb that can turn like a flesh-and-blood foot.

A blueprint for restoring touch with a prosthetic hand

Posted: 14 Oct 2013 12:56 PM PDT

New research is laying the groundwork for touch-sensitive prosthetic limbs that one day could convey real-time sensory information to amputees via a direct interface with the brain.

Birth gets the brain ready to sense the world

Posted: 14 Oct 2013 09:17 AM PDT

Neurons that process sensory information are arranged in precise, well-characterized maps that are crucial for translating perception into understanding. A study reveals that the actual act of birth in mice causes a reduction in a brain chemical called serotonin in the newborn mice, triggering sensory maps to form. The findings shed light on the role of a dramatic environmental event in the development of neural circuits and reveal that birth prepares newborns for survival.

Adult stem cells help build human blood vessels in engineered tissues

Posted: 14 Oct 2013 08:37 AM PDT

Researchers have identified a protein expressed by human bone marrow stem cells that guides and stimulates the formation of blood vessels. Their findings could help improve the vascularization of engineered tissues.

Pandoravirus: Missing link discovered between viruses and cells

Posted: 14 Oct 2013 07:23 AM PDT

With the discovery of Mimivirus ten years ago and, more recently, Megavirus chilensis, researchers thought they had reached the farthest corners of the viral world in terms of size and genetic complexity. With a diameter in the region of a micrometer and a genome incorporating more than 1,100 genes, these giant viruses, which infect amoebas, had already largely encroached on areas previously thought to be the exclusive domain of bacteria. For the sake of comparison, common viruses such as the influenza or AIDS viruses only contain around ten genes each.

Go to bed: Irregular bedtimes linked to behavioral problems in children

Posted: 14 Oct 2013 06:38 AM PDT

Researchers have found that children with irregular bedtimes are more likely to have behavioral difficulties. The study found that irregular bedtimes could disrupt natural body rhythms and cause sleep deprivation, undermining brain maturation and the ability to regulate certain behaviors.

Database of disease genes shows potential drug therapies

Posted: 13 Oct 2013 01:33 PM PDT

Researchers have created a massive online database that matches thousands of genes linked to cancer and other diseases with drugs that target those genes. Some of the drugs are approved by the U.S. Food and Drug Administration, while others are in clinical trials or just entering the drug development pipeline.
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