Non-rapid eye movement sleep activation occurs during NREM that is comparable to the type that occurs during REM. It is this sub-cortical activation that results in dreaming during the NREM stage during the morning hours. During non-REM sleep, the tonic drive to most respiratory muscles of the upper airway is inhibited. This has two consequences: However, because the diaphragm is largely driven by the autonomous system, it is relatively spared of non-REM inhibition. As such, the suction pressures it generates stay the same. This narrows the upper airway during sleep, increasing resistance and making airflow through the upper airway turbulent and noisy. For example,
REM World REM World REM World is a fantasy/science fiction novel by Rodman Philbrick about a boy who orders a device that will help him lose weight, and when using it he enters a world where he will not only lose weight, but go on the biggest adventure of his life. Other books made by Rodman Philbrick are "Freak the Mighty", "Max the Mighty", and "The Last Book in the Universe". The title comes from the 4th stage of sleep (a.k.a. Rapid Eye Movement). Arthur Woodbury is very tired of being overweight and being called "Biscuit Butt". The reason he is overweight