What is the suprachiasmatic nucleus?

The suprachiasmatic nucleus (SCN) is a central clock in the brain, located right above the roof of your mouth. It is crucial for regulating the body's cortisol and melatonin rhythms, which are vital for maintaining good health. Disruptions in these rhythms can lead to serious health issues such as cardiovascular disease, dementia, and depression. The SCN receives input from retinal ganglion cells in the eyes, which detect light and send signals to help time these rhythms properly. Ensuring that this system receives adequate light, particularly in the morning, is vital for aligning these rhythms accurately, thereby promoting better overall health 1.