在20世纪,人们已经将大脑奖赏中心的脑电图画了出来,并且认为在大脑各区域间传导信息的化学递质是多巴胺。另外,人们对奖赏中心的功能有了一致认识,这就是对动物进行像吃东西和性交这类具有生存意义的活动进行奖赏。在此后的许多年中,从像吸食海洛因、达到性高潮这样强烈的快感,到相对平和的饱餐后的满足 In the twentieth century, brain EEGs at the Brain Reward Center have been drawn and dopamine is thought to be the chemical mediator that conducts information across all regions of the brain. In addition, there is a common understanding of the functions of the Rewards Center, which is to rewards animals for living activities such as eating and sexual intercourse. In many years thereafter, from strong feelings of pleasure such as heroin abuse, orgasm, to relatively modest satisfaction after the meal