Fig. 2
From: Melatonin treatment decreases c-fos expression in a headache model induced by capsaicin
Photomicrographs of the Fos expression in the TNC/II layers. a Tissue from animal that received vehicle; b tissue from capsaicin-injected animal; c tissue from animal that received capsaicin and melatonin; d tissue from pinealectomized animal; e tissue from sham-operated animal; and f tissue from pinealectomized rat that received capsaicin injection. ×200, scale bar 150 μc. Arrow shows positive-like staining that was counted as c-fos-positive cells