"I'm really proud of the Finnish general public," said Nummenmaa. "We had no problem whatsoever in recruiting people for the experiment."
努曼玛表示:“我为芬兰大众感到非常骄傲。”“我们不费力气就找到了愿意参与本次实验的志愿者。”
When the researchers compared the men's scans, they noticed that gentle stroking caused a drop in natural opioids in brain areas called the ventral striatum and the anterior cingulate cortex, which are mainstays of the brain's reward circuitry. This was counter to expectations: they had expected levels to rise.
当研究人员对比两次扫描结果后发现,轻柔的抚摸导致大脑内部腹侧纹状体与前扣带脑皮质分泌自然阿片类物质,而二者正是大脑奖励回路机制的重要区域。但这一发现与之前的预测相违背:研究人员本期待阿片类物质在分泌浓度上有所提升。
Nummenmaa said that opioid might work in a similar way to a painkiller, with the body needing less the more comfortable it was. "The opioid system is typically engaged during pain, so you get a boost in painful situations. The social touching might be doing exactly the opposite. You can think of it as pain alleviation. That might be the underlying mechanism for why hooking up with others makes us feel so good in the first place," said Nummenmaa. Details of the study were given at theSociety for Neuroscience meeting in San Diego.
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