Abstract: ObjectiveTo observe the improve effect of Yiqihuoxue Chinese materia medica for the ethology of mouse with diabetes mellitus encephalopathy induced by streptozotocin (STZ).MethodsCreating mouse model using 1% STZ intraperitoneal injection. 50 mouses were randomly divided into the normal control group, model control group, large dosis Chinese materia medica group, middle dosis Chinese materia medica group and small dosis Chinese materia medica group. Mouses'behaviors of evading dark reaction and Morris water maze in different groups were tested.ResultsYiqihuoxue Chinese materia medica had not the fuction of lower blood suga to the mouse with diabetes mellitus encephalopathy induced by STZ. But Yiqihuoxue chinese materia medica could improve the ethology show and mental status of mouse with diabetes mellitus encephalopathy induced by STZ obviosly, decrease the lightning stroke frequency when the diabetes mellitus encephalopathy mouses entered the dark chamber, extend the latency period, shorten the diabetes mellitus encephalopathy mouses swimming out time and distance, improve the study and memory ability.ConclusionYiqihuoxue Chinese materia medica had the improve effect for the ethology of mouse with diabetes mellitus encephalopathy induced by STZ.

Key words: Yiqihuoxue Chinese materia medica, animal experiment, evade dark reaction, Morris water maze