Device Allows Paralyzed Rats to Walk, Human Trials Soon

This poor rat had his little spinal cord severed in a perfectly controlled laboratory experiment… let’s tell him it was an accident; a freak lab accident. While yes, it does indeed suck to be him, the good news is that he’s walking again. The Swiss Federal Institute for Technology (EPFL) has used a new method of spinal stimulation to help the furry little dude walk again.. That’s right, they electrically stimulate the spinal cord to tell the legs what to do.

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Normally, spinal stimulation is difficult or impossible because any givenĀ amplitudeĀ and frequency of electric pulses rarely works more then once. That’s right, severed spinal cords adapt to not survive, like the galaxy’s crappiest borg. EPFL, like Captain Picard’s crew, have created a device that automatically adjusts the pulses so that the spine can learn properly. The result is that they’ve developed algorithms that allow them to electrically puppet the rats’ bodies into walking and even climbing stairs.

What’s actually cool about this, rather than just impressive, but sad and creepy, is that human trials are planned for the coming summer. Of course, rather than a gaggle of scientists forcing you to walk up stairs, the plan is to use this in concert with existing technology to help paralyzed people regain control of their lost limbs. That’s awesome.

[via IFL Science]

Duke melds two rats’ minds through the internet, Spock may not approve

Duke University melds two rats' thoughts over the internet we're not sure Spock would approve

Some would say the internet already lets us share every minute detail of our thoughts, much to our followers' dismay. Duke University isn't deterred by our behavior -- if anything, it just took oversharing literally by connecting two rats' minds in an experiment, first in a lab and ultimately online. Electrodes attached to the brain of a host "encoder" rat in Brazil processed the motor-oriented mental activity for a desired behavior, such as pressing a lever on cue, and converted it into a signal that was then received by a "decoder" rat as far away as Duke's US campus. The majority of the time, the decoder rat performed the same action as the encoder. Researchers also found that rewarding the encoder alongside the decoder created a virtuous loop, as treating the first rat for a job well done focused its attention and improved the signal strength.

We're not sure that Vulcans would endorse this kind of mind meld, though: apart from immediately depriving the decoder rat of self-control, prolonged testing led to the same rodent developing additional sympathetic reactions to the encoder. There's also concerns that the test was too binary and didn't reflect the complexity of the whole brain. All the same, Duke's study is proof enough that we can export brainwaves in a meaningful way.

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Via: Discovery News

Source: Nature

Fake jellyfish made from rat cells have a place in our hearts (video)

Fake jellyfish made from rat cells have a place in our hearts (video)

There's a whole sea of jellyfish out there ready to sting indiscriminately. So, why do we keep trying to make them? Scientists from Harvard and Caltech have a pretty good reason for creating fake jellies -- they hope to mend broken hearts by adapting their 'pumping' style of movement. Much like our own vital organ, the creatures are a mass of muscle adept at shifting fluid, meaning the research has several medical applications, such as bioengineered pacemakers for busted tickers. In creating the Medusoids, the team used a silicon scaffold coated in functional rat cardiac tissue, copying the muscle layout of a real jellyfish as best they could. When immersed in salt water and treated to bursts of current, the cells contract and cause the silicon sheet to move in a way eerily similar to the real thing. Next step for the team? An autonomous version that can move and potentially feed without their influence, of course. And, after seeing the little swimmers in action, we've certainly got palpitations. See what we mean after the break.

Continue reading Fake jellyfish made from rat cells have a place in our hearts (video)

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Fake jellyfish made from rat cells have a place in our hearts (video) originally appeared on Engadget on Mon, 23 Jul 2012 14:59:00 EDT. Please see our terms for use of feeds.

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