Central vs. peripheral spontaneous behavioral abnormalities in experimental hepatic encephalopathy.

The most common behavioral disturbance reported in experimental chronic hepatic encephalopathy (HE) refers to changes in spontaneous activities in an open field in the portacaval-shunted (PCS) rat. A major problem at present is that not all of these findings of abnormal PCS behavior are in agreement. We, therefore, investigated the total, central, and peripheral locomotor and rearing activities in an open field 2 and 6 months after PCS surgery.