Melatonin, decrease in alertness or sluggish feeling down, including body temperature began dropping is a mechanism that helps make sleep easier.A dark intensity of stimulus and stops the secretion when vs. light.
Melatonin awake feeling down or sluggish down. The body temperature was dropping. Is a mechanism that makes it easier to fall asleep with the darkness and the actuator stop shed light on it.
Melatonin feel awake decrease or stagnation. Including body temperature starts dropping. As a mechanism to help sleep easier.The darkness is a stimulating and stop the shed when the light.