Functional Impact of Pain and Opioid Addiction on the Mesolimbic Dopaminergic Sys

中脑边缘系统在调节疼痛和调节对阿片类药物的反应方面都起着关键作用。 这一点已在中心总体描述一节中详细讨论。这一制度 从腹侧被盖区投射的多巴胺能神经元与奖赏有关。 阿片类药物的作用机制，是成瘾过程中的一个焦点(Koob和Le Moal，2001；Nestler，2004； Volkow等人，2004年；Nestler，2005；西班牙人和Heilig，2005)。此外，毒品的一个共同属性是 滥用是指NAC中释放的多巴胺。这一系统内的适应被认为是一种 上瘾。多巴胺能系统的改变也被发现与疼痛状态有关。 在动物和人体成像研究中(Borsook和Becera，2006；Schweinhardt等人，2006)。证据 Hagelberg最近对纹状体D2DR在调节人类疼痛中的重要作用进行了综述 等人的研究。(Hagelberg等人，2004年)。大脑区域和感受器系统的这种融合对两者都有影响 痛觉调制和滥用药物的回报效应表明，中心假说需要通过以下方式进行检验 这项提议。

The mesolimbic system plays a critical role both in modulating pain and mediating the response to opiates. This has been discussed in detail under General Description of the Overall Center. This system of dopaminergic neurons that project from the ventral tegmental area (VTA) has been implicated in the reward mechanism of opiates and is a focal point in the process of addiction (Koob and Le Moal, 2001; Nestler, 2004; Volkow et al., 2004; Nestler, 2005; Spanagel and Heilig, 2005). Moreover, a common attribute of drugs of abuse is the release of dopamine in NAc. Adaptations within this system are believed to be a mechanism of addiction. Alterations within the dopaminergic system also have been found to be associated with pain states in both animal and human imaging studies (Borsook and Becerra, 2006; Schweinhardt et al., 2006). Evidence for the important role of striatal D2DR in modulating pain in humans has been reviewed recently by Hagelberg et al. (Hagelberg et al., 2004). This convergence of brain regions and receptor system that impact upon both modulation of pain and the rewarding effects of drugs of abuse suggests the central hypothesis to be tested by this proposal.