The Suprachiasmatic nucleus reference article from the English Wikipedia on 24-Jul-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Suprachiasmatic nucleus

The suprachiasmatic nucleus(SCN) is a nucleus in hypothalamus. It regulates the circadian rhythm. It consists of various cell types, some which possess ability for light-induced gene expression, they have direct connection to the retina.

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