Fig. 8

NR2B-positive immunoreactive neurons in transverse sections of the spinal dorsal horn and central canal region at the lumbosacral (L6-S2) segmental level (magnification ×100). a Low expression of NR2B in the spinal dorsal horn of the control rat; b high expression of NR2B in the spinal dorsal horn of the model rat (without any treatment); c low expression of NR2B in the spinal dorsal horn of the EA-treated model rat; d high expression of NR2B in the spinal dorsal horn of the sham EA-treated model rat; e low expression of NR2B in the central canal region of the control rat; f high expression of NR2B in the central canal region of the model rat (without any treatment); g low expression of NR2B in the central canal region of the EA-treated model rat, h high expression of NR2B in the central canal region of the sham EA-treated model rat. Scale bar 100 μm