Hi Everyone!
I just found this article in a newsletter I received from the "Life Rolls On" website. I thought someone might benefit from it. Thanks.
Janis Bellino
Mice With SCI Walk Again
For years it was believed that if someone sustained a spinal cord injury (SCI), cellular communication from the brain to other parts of the body would stop at the level of injury. A recent study published by Dr. Michael Sofroniew and his research team at the David Geffen School of Medicine at UCLA, however, provides new evidence that this may not be true.
Working with mice, the research team blocked long nerve fibers along different parts of the spinal cord, but left shorter nerve fibers at the center of the spinal cord intact. This resulted in paralysis in the mice, similar to an incomplete spinal cord injury in humans. After eight weeks without further surgery, many of the mice regained the ability to control their legs and, although slower than before, were able to walk.
The researchers concluded that the central nervous system was able to reorganize itself. When original routes for cellular communication along long nerve fibers were obstructed, the central nervous system utilized alternative pathways along the shorter nerve fibers enabling the brain to send signals to the body necessary for movement.
Sofroniew compared his teams findings to drivers reactions when they encounter an accident on the freeway. When faced with an obstruction along their original route, often drivers will exit the highway to take side streets in order to get around the accident. Though this path is less direct and slower than their original route, they are nonetheless able to reach their destination.
"If we can use existing nerve connections instead of attempting to rebuild the nervous system the way it existed before injury, our job of repairing spinal cord damage will become much easier," said Sofroniew.
The researchers hope to eventually identify, grow and connect the key cells that can be utilized to re-route signals from the brain around the injury site. If they are successful, it could result in new opportunities to restore mobility for those with SCI.
For the complete story, visit www.sciencedaily.com.
Citation:
University of California Los Angeles (2008 January 7) Scientists Restore Walking in Mice After Spinal Cord Injury. Science Daily. Retrieved January 16, 2008 from www.sciencedaily.com)
Photo Courtesy ABC News




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