Fig. 9

Number of NR2B-positive immunoreactive neurons at the lumbosacral (L6-S2) segmental level in the four rat groups (model, EA, sham EA, control; n = 8 rats in each group). Abscissa Number of NR2B-staining neurons, ordinate observed areas (see caption to Fig. 3 for definition of abbreviations) in the spinal dorsal horn observed at low magnification (×100) under a microscope. Data are presented as the mean ± SE. *Significant difference at P < 0.05 vs. control, ^#significant difference at P < 0.05 vs. model, ^$significant difference at P < 0.05 vs. control, ^&significant difference at P < 0.05 vs. EA