Suprachiasmatic nucleus - definition
nucleus in hypothalamus that regulates circadian rhythms. It is responsible for ensuring that a number of bodily functions operate on a 24-hour cycle.
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2-Minute Neuroscience: Suprachiasmatic Nucleus
Know Your Brain: Suprachiasmatic Nucleus
The suprachiasmatic nucleus is represented by the small green area within the hypothalamus (also indicated by the red arrow).