Neural basis of circadian rhythms
Circadian rhythms are regulated by a biological clock located in the suprachiasmatic nucleus of the hypothalamus, which receives information from the eyes about the light-dark cycle and uses this information to regulate the release of hormones and other molecules that control the timing of biological processes. Disruptions to circadian rhythms can have negative effects on health and wellbeing, such as an increased risk of depression, metabolic disorders, and certain types of cancer. To better understand the neural basis of circadian rhythms, researchers have explored the roles of various brain regions, neurotransmitters, and hormones in regulating the biological clock.