a small region of the hypothalamus where circadian rhythms are controlled. See biological clock. Direct input from retina is received by this. You can also read biological clock for understanding.
Cite this page: N., Pam M.S., "SUPRACHIASMATIC NUCLEUS (SCN)," in PsychologyDictionary.org, April 13, 2013, https://psychologydictionary.org/suprachiasmatic-nucleus-scn/ (accessed March 1, 2021).