In order to work properly, the hippocampus, an area of the brain crucial to memory, needs deep sleep, undisturbed by “external stress factors, such as noise and light. ”
Selleks et hipokampus – mälutalitluses oluline ajuosa – hästi töötaks, vajab ta sügavat und, mida ei sega „välised stressorid, nagu müra ja valgus ”.