Fig. 3.

Bright-field photomicrographs of 50 μm transverse sections through the dorsal horn showing B-HRP labeling of central terminals of the sciatic nerve in a sham-operated animal at the L5 (a) and L3 (b) level. Note that lamina II is devoid of any B-HRP reaction product (arrows). Territory occupied by saphenous afferent central terminals can be seen to interrupt B-HRP labeling in the center of the dorsal horn inb. In a capsaicin-treated animal at L5 (c) and L3 (d), lamina II now displays dense B-HRP staining (arrows). Scale bar, 200 μm.