It appears to involve more primitive aspects of the brain, activating deep structures that may block pain at a spinal level — similar to how opioid analgesics work.
The research team discovered changes in mu opioid receptors and dopamine transporters of the brain -- areas important to reward pathways.
研究团队发现在的末梢神经及大脑的多巴胺传输中，区域对酬谢路径非常重要。
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After a month, the structure of the brains of these rats ADAPTS to increased dopamine levels, showing fewer of a certain type of dopamine receptor than they used to have and more opioid receptors.