How closing our eyes for about 10 mins trigger our brain to sleep

Question

It isn’t that I wanna know how we fall asleep, more how closing our eyes specifically triggers it.

In: Biology

Answer 1

The suprachiasmatic nucleus, a very small part of the brain made up of thousands of different nerve clusters can receive information about light exposure from the eyes. This is the actual structure that is needed to percieve the “lack of stimulus”