Pérez-Cruet J
Pavlov J Biol Sci. 1976 Oct-Dec;11(4):237-50. doi: 10.1007/BF03000317.
Psychotropic drugs such as methadone, morphine and bulbocapnine produce increments in dopamine metabolism as an unconditioned reflex. When a buzzer noise is used as a conditioned stimulus (CS) with these drugs as unconditioned stimuli, the buzzer CS acquires the properties of the drugs in increasing dopamine metabolism. These results suggest that the brain, like other visceral organs, can be conditioned in terms of neurotransmitter release or metabolism.
美沙酮、吗啡和荷包牡丹碱等精神药物会作为一种非条件反射使多巴胺代谢增加。当将蜂鸣声用作条件刺激（CS），而将这些药物用作非条件刺激时，蜂鸣条件刺激在增加多巴胺代谢方面获得了这些药物的特性。这些结果表明，大脑与其他内脏器官一样，可以在神经递质释放或代谢方面形成条件反射。
