Sept. 21, 2009 - Paralyzed rats whose spinal cords had been severed from their brains were made to run again using a technique that scientists say can work for people, according to a study released Sunday.
Consistent electrical stimulation and drugs enabled the rats to walk on their hind legs on a treadmill - bearing the full weight of the body - within a week of being paralyzed.
With the addition of physical therapy, the rodents were able after several weeks to walk and run without stumbling for up to 30 minutes, reported the study, published in the journal Nature Neuroscience.
Remarkably, the animals could adjust their movements in response to stimuli despite the lack of signals to and from the brain: when the treadmill was reversed, for example, the rats walked backwards.
"This means that the spinal network is almost capable of cognitive processing," explained Gregoire Courtine, a professor at Zurich University.
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Paralyzed Rats Regain Their Footing
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Tuesday, September 22, 2009
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