c-Fos expression in the spinal.

<p>Rats were divided into naïve group (virgin female rats exposed in 30% oxygen balanced by 70% nitrogen), control group (parturient rats exposed in 30% oxygen balanced by 70% nitrogen), sevoflurane group (parturient rats exposed in 0.35% sevoflurane in 30% oxygen balanced by nitrogen), or xenon group (parturient rats exposed in 35% xenon in 30% oxygen balanced by nitrogen). Photomicrographs show c-Fos expression in the dorsal horn at the lumbosacral level of the spinal cord (<b>A</b>). <b>B</b> shows the quantification of c-Fos positive cells. Data are expressed as mean ± SEM (n = 4). **p<0.01. Bar = 100 µm. The inserted box indicates the area being subjected to high magnification image.