Methods:Microinjected agonist or antagonist of dopamine receptors into caudate nucleus of anesthetized rats then observed the changes of arterial blood pressure and heart rate.

• 结果:一侧尾核内微量注射多巴胺或多巴胺受体激动剂阿朴吗啡均引起大鼠动脉血压、心率的显著增加。