For years, scientists thought that neurons in the brain's suprachiasmatic nuclei, or SCN, regulated our body clocks by firing a lot during the day and less at night.
很多年来，科学家们认为大脑的视交叉上核(scn)是生物钟中枢，具体机制是此处的神经元白天比夜间更兴奋。
The biological clock itself is believed to be a cluster of nerve cells called the suprachiasmatic nucleus.
生物钟被认为是叫做视交叉上核的神经细胞的聚集。
Initial theories suggested a pathway from the retina to the suprachiasmatic nucleus.
初步理论表明视网膜至视交叉上核间有一通道。
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