Today is a motivation-less day. Still here at work though. Sad fais.
Like a parent singing nursery rhymes to a toddler, melatonin coaxes the body to fall asleep. High levels remain in the bloodstream into the morning. The discovery of this hormone helped scientists identify the gears behind the biological clock: a small cluster of cells deep behind the eyes called the suprachiasmatic nucleus (known as the SCN to biologists).
These cells let the pineal gland know when the eyes pick up bright light. When it’s dark for a while, the pineal gland assumes it is bedtime and sends melatonin throughout the body to let the organs know that it is time to close up shop.
But here’s the thing: the pineal gland can be tricked pretty easily. For all of its wonders, the human body is still a reflection of a world where the only source of bright light was the sun. Abundant white light — especially white light with a slight blue tint that mimics the sky on a clear day — can fool the pineal gland into thinking that the sun is still up. That is why watching television or working on a laptop late at night can make it harder to fall asleep.
With enough bright light over the right amount of time, the pineal gland becomes something of a reverse snooze button, holding off on releasing melatonin because it thinks that it is still daytime."
— David K. Randall — Dreamland: Adventures In The Strange Science of Sleep (via scinerds)