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A team of researchers from the University of California, Los Angeles (UCLA), the California Institute of Technology (Caltech), and the University of Louisville have used a stimulating electrode array to assist a paralyzed man to stand, step on a treadmill with assistance, and, over time, to regain voluntary movements of his limbs. The electrical signals provided by the array, the researchers have found, stimulate the spinal cord's own neural network so that it can use the sensory input derived from the legs to direct muscle and joint movements.
Rather than bypassing the man's nervous system to directly stimulate the leg muscles, this approach takes advantage of the inherent control circuitry in the lower spinal cord (below the level of the injury) to control standing and stepping motions. The study is published May 19 in the British medical journal The Lancet.
The scientists aren't yet fully sure how these functions were regained -- or, indeed, how the control of voluntary function was returned through the procedure. "Somehow, stimulation by the electrodes may have reactivated connections that were dormant or stimulated the growth of new connections," Burdick says. Almost certainly, reorganization of the neural pathways occurred below and perhaps also above the site of injury.
Originally posted by Schkeptick
I noticed the study was paid for by the Christopher & Dana Reeve Foundation.
Also noticed the method was found using animal research. Necessary evil?