GFAP-positive cells in Vc of the IANX rats and that from sham-control rats. A–I, Low- and high-magnification photomicrographs of Vc in sham-control rats (A–C), and in rats 1 (D–F) and 7 (G–I) d after IAN transection. The percentage area occupied by GFAP-positive cells was analyzed for the dorsal portion of the Vc innervated by third branch of the trigeminal nerve (B, E, H) and the middle portion of the Vc innervated by the second branch of the trigeminal nerve (C, F, I) (see Noma et al., 2008). Histograms in J indicate the relative mean area occupied by GFAP-positive cells in that part of Vc innervated by the second and third branches of the trigeminal nerve, respectively. **p < 0.01.