Fig. 8From: Sildenafil reduces neuroinflammation and restores spatial learning in rats with hepatic encephalopathy: underlying mechanismsSpatial learning in the radial maze is impaired in PCS rats and is restored by treatment with sildenafil. Spatial learning ability in the radial maze was assessed in sham and PCS rats, treated with vehicle or sildenafil (SIL). Values are the mean ± SEM of 10–14 rats per group. Values significantly different from control rats are indicated by asterisks and from PCS rats by a. *p <0.05; a p < 0.05Back to article page