In this video, Dr. Kushner examines the science of sleep, including sleep stages (N1, N2, N3, REM) and sleep cycle.
Digital notes for students and teachers: https://www.etsy.com/listing/14725605...
Corrections:
➡3:20: "Suprachiasmatic nucleus" is off screen
➡9:15: I should have stated "Electroencephalogram"