Effects of nerve lesions on the numbers of p75-ir ring structures in the DRGs ipsi- and contralateral to the lesions. The surgical procedures were as described in Materials and Methods.Shaded bars, Ipsilateral DRGs; filledbars, contralateral DRGs. Sci. n, Sciatic nerve division; VR, ventral root section;DR, dorsal root section. ANOVA: F = 31.7, p < 0.01; *p < 0.01 compared with control; +p < 0.05 compared with DRG contralateral to sciatic nerve division alone (filledbar).