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Prosthetic electrodes will return amputees' sense of touch
For all the functionality and freedom that modern prosthetics provide, they still cannot give their users a sense of what they're touching. That may soon change thanks to an innovative electrode capable of connecting a prosthetic arm's robotic sense of touch to the human nervous system that it's attached to. The device is part of a three year, $1.9 billion DARPA project and is being developed by Daniel Moran and his team at Washington University in St. Louis. The electrode, technically called a macro-sieve peripheral nerve interface, is comprised of a thin contact lens-like material less than 20 percent the diameter of a dime. It reportedly allows its users to feel heat, cold and pressure by stimulating the ulnar and median nerves of the upper arm.
The Big Picture: a closer look at live rodent nerve cells
What you're looking at up above isn't a crazy anaglyph 3D image. Well, at least not intentionally. It's actually the result of a decade-old tagging method that researchers at the European Molecular Biology Laboratory in Italy are now using in live mice. The method, called SNAP-tagging, uses proteins that latch onto specific chemical structures and don't let go. To explore rodent nerves, researchers genetically engineered the mice to produce SNAP proteins and then injected the vermin with fluorescent probes that the proteins would attach to. This allows them to be followed through the body with a microscope. For example, in the picture above, the thick blue lines are hairs and the red bundles are nerves.
Electronic neural bridge helps paralyzed mice walk again, human application might prove tricky
It's only been a week since we heard about age reversal in mice, yet already we've got another big advancement in rodent medical care: a solution for ameliorating the devastating effects of spinal cord injuries. A UCLA research team has shown off a new system that can restore walking motion to a mouse's hind legs, but not only that, it also grants control to the little fella by responding to its front legs' actions. Electromyography sensors detect when a mouse starts to walk up front, triggering electronic signals to be sent to the functional lower portion of its spine, which in turn starts up the rear muscles for a steady walking gait. It's only been tested on a treadmill so far, but the result seems to be a seamless restoration of walking capacity in rodents that doesn't require any outside assistance. The same will be pretty hard to replicate in humans, bipeds that they are, but that's why it's called research and not reobvious.
VNS implant might fix the ringing in your ears
Earlier this decade, doctors discovered that by shocking the vagus nerve -- one of twelve nerves connected directly to the brain -- they could attempt to treat chronic hiccups, epilepsy and severe depression. Now, a startup called Microtransponder believes such a device can help reduce tinnitus, too. Technology Review now reports the company's RFID-like, externally-powered implant could stimulate the vagus nerve while doctors play particular tones for those suffering ringing ears, slowly attuning the patients to frequencies other than the one that ails them. As with all new medical procedures, we don't expect to see this one on the market anytime soon, but the firm does claim it's just raised $10 million in funding and will pursue FDA clearance accordingly. Until then, you'll just have to try less invasive procedures, or simply restrain yourself from turning that volume dial to 11. Ch'yeah right!
Breakfast Topic: Performance anxiety
I know it's just a game. Sometimes, though, I feel the pressure of having to perform well. It's obvious during Arena matches, where the pressure to win gets to the point where it frays nerves and leads to nerdrage, frustration, and sometimes just plain exasperation. When our GM announced that he would be holding tryouts for Ulduar based on our raid performance, I felt pressured to perform a little more. Even though we have all content on farm, I would respec to a PvE spec for Naxxramas of all things, just to perform well enough to justify getting into our Ulduar core group.Mind you, I'm a founding officer of this guild, but the tryouts apply to me just the same. I respect that a lot, as it means that our GM looks at everything from a performance persective and not just because this or that person is a friend or this or that person has been with the guild a long time. This gives me a lot of confidence for Ulduar. While most of the game now is pretty casual, I guess there are still a precious few aspects that put butterflies in our stomach. Would you agree? Let's say, being the healer in a PUG. Do you feel the pressure to perform? Do you feel like you're under the microscope? Or being the new recruit in an Arena team, do you feel like you have to come up with the numbers to keep your slot? Or how about when your guild is going after Immortal or Undying? As easy as the game seems now, what situations give you some form of stage fright?
Researchers develop artificial nerve
Regular nerves getting you down? Why not try a bionic nerve? According to reports, researchers at the University of Michigan have developed an artificial nerve which could have the ability to bring damaged limbs and organs back to life. In a study published in the medical rag Experimental Neurology, Dr. Paul Kingham and his team at the UK Centre for Tissue Regeneration managed to take fat tissue from adult animals and differentiate them into nerve cells to be used for repair and regeneration. The team will repeat the study with human volunteers, and then develop an artificial nerve constructed from a biodegradable polymer. The "bio-material" will be rolled into a tube-like structure and inserted between two cut nerves, so that regrowing nerve fibers can spread from one end to the other. Next, the researchers hope to create a species of tyrannical man-bots called the Borg, whom they hope will move outward through the galaxy, assimilating all who stand in their way.[Via Slashdot]
