Histological results of dorsal root stimuli on the motility of microglia in spinal dorsal horn. (A). Schematic representation of the confocal imaging and field potential recording accompany with dorsal root stimuli; (B). Digitized photomicrographs of the dorsal root stimuli model in a transverse spinal cord section. (C). Observation of microglia in one fixed section of spinal cord after low frequency dorsal root stimuli. Rectangled areas in (C) were magnified in (D) and (E) respectively. Ipsi., ipsilateral part of dorsal root; Contro., controlateral part of dorsal root. Bars equal to 100 μm in (C) and 50 μm in (D) and (E).