Fig. 4From: Trigeminal activation patterns evoked by chemical stimulation of the dura mater in ratsDiagrams illustrate the number of c-Fos positive neurons (mean + SEM) 4 h after CFA a or saline b treatment. Representative photomicrographs of the dorsal horns in 4CFA c, 4PHYS d. Scale bar: 200 μm. Cells were displayed according to somatotopic area of V/1, V/2, V/3 nerve. No difference was seen between 4CFA a and 4PHYS b groupBack to article page