In 8 cases of Burger's disease, an examination of galvanic skin reflex of the soles of feet, and a surveying of the electric skin resistance and the skin temperature of lower limbs were carried out before and after lumbar sympathectomy was done. Of these, in 4 cases an examination was made by the use of faradic stimulation to the lumbar sympathetic ganglion during the operation.
1) In the preoperative test, it was noted that the reflex was registered from the right and the left soles of the feet. Although there was found a certain differcnce in the electrical resistance of the sole, in the latent time of reflex-curve, in reaction time, and in the amplitude, a correlation between it and the degree of seriousness of the disease could not be scertained.
2) When a faradic stimulation was applied during the operation to the lumbar sympathetic ganglion L
2, L
3 and L
4, the reflex seemd to appear on the sole of the same side. However, by maintaining the basic current at 150-250μA, the value of current-change could be raised from several μA to several scores of μA so that it is easily verified in the μ-Ammeter. When L
1-L
5 are stimulated separately, only L
3 and L
4 gave response to the stimulation. From these findings it is assumed that the post ganglionic sympathetic fibers which control the reflex of the sole of the foot, pass L
3 and L
4.
3) After removal of L
3 and L
4 the, electric skin reflex of the sole showed marked increase as compared to the unoperated side, and it showed no decrease even vhen heat was applied indicating the complete disappearance of the electric skin resistance. In the lower limbs the electric skin resistance showed a marked increase with comparatively clear cut demarcation as was reported by Richter.
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