Fig. 3.

Difference scores in percentage calculated by dividing the threshold of the experimental side by that of the control side in the L4/5 disk incision and adjacent nerve displacement with and without sympathectomy series. a Mechanical stimulation. The reductions caused by the combination of disk incision and nerve displacement on days 3 and 7 after spine surgery were significantly prevented by sympathectomy (P<0.05). b Thermal stimulation. The reduction caused by the combination of disk incision and nerve displacement on day 21 after spine surgery was significantly prevented by sympathectomy (P<0.05). Filled square disk incision + nerve displacement group, open circle disk incision + nerve displacement with sympathectomy group