Fig. 1. Immunofluorescence of dorsal horn (DH) from an ipsilateral L3 spinal segment taken from a naive rat (A ) (of the same age and weight as for B and C ), at postoperative day (POD) 3 after skin–muscle incision retraction (SMIR) treatment (B ), and 3 days after sham treatment (C ). By comparison, segments from L3 were also taken from SMIR-treated rats at POD 12 (E ), and 12 days after sham treatment (F ). The naive control for the second group (D ) shows a similar low density of positive cells. Scale bar = 100 μm.