Abstract
1) Back muscles on the right side of the rat were daily stimulated with electrical pulses through implanted electrodes. As a result, a scoliosis with convexity toward the non-stimulated side wasproduced. The cobb angle increased with time and became 18.6 9.9 on average after 3 weeks.
2) On the stimulated side, type I fibers showed a significant increase in diameter. The area they occupied in the cross section, as well as the ratio of the area against that of type II fibers, were increased. These increases disappered 3 weeks after the termination of the stimulation, whereas the scoliosis remained almost the same, maintaining an average angle of 17.2 7.4 after 3 weeks.
3) From these results, the possibility was suggested that electrical stimulation is of use in treating idiopathic scoliosis.
