Fig. 2. Photomicrograph showing cFos expression induced by uterine cervical distension. There is a significant increase in cFos expression in the deep dorsal horn regions of animals receiving 60 min of distension (A ) compared with animals having surgery but no distension (B ) and lidocaine infiltration of the cervix prior to distension (C ). Photomicrographs (D ), (E ), and (F ) show the cFos immunostaining in the central canal region (lamina X) in animals with 60 min of distension, surgery without distension, or distension after local lidocaine infiltration, respectively.