Fig. 2
From: Trigeminal activation patterns evoked by chemical stimulation of the dura mater in rats
Diagrams show the mean number of c-Fos IR neurons in the dorsal horns in NAT a and FRE b groups. Representative photomicrographs of the dorsal horn from NAT c and FRE groups d. Scale bar: 200 μm. Use of stereotaxic frame caused robust increase of c-Fos positive cells in the area corresponding to maxillary nerve in NAT group. Number of c-Fos IR cells was minimal in FRE group (maximal cell number 3.83 ± 1.68 in the ophthalmic nerve area) (mean + SEM)