“This rocking is very gentle, very smooth, oscillating every four seconds. It’s not like rocking like you would see some mothers rocking their babies, it’s more gentle,” explained Sophie Schwartz, Professor of Neurology who led the study.
During the research, a dozen adult subjects napped for 45 minutes in a custom-made bed while scalp electrodes record brain activity. Each subject took an afternoon nap while the bed was stationary and another while it was rocking gently like a hammock.