All sleep is not the same. Deep sleep and REM, for instance, are two different forms of sleep which are often confused with one another.
The value of sleep to a dental professional
Difference Between Deep Sleep and REM Sleep: Chase Dental Sleepcare: Dental Sleep Medicine
Deep Vs. REM Sleep - What's The Difference?
Frontiers A Review of Equine Sleep: Implications for Equine Welfare
Stages of Sleep: What Happens in a Sleep Cycle
Deep Sleep: What Is It and How to Measure and Optimize It
Deep Sleep: What Is It and How to Measure and Optimize It
Neck muscle and masseter twitches during REM sleep following lesions in
The REM sleep circuit and how its impairment leads to REM sleep behavior disorder
Regulation of REM and Non-REM Sleep by Periaqueductal GABAergic Neurons
Frontiers The Transition Between Slow-Wave Sleep and REM Sleep Constitutes an Independent Sleep Stage Organized by Cholinergic Mechanisms in the Rostrodorsal Pontine Tegmentum
Difference Between Deep Sleep and REM Sleep: Chase Dental Sleepcare: Dental Sleep Medicine
Noradrenergic circuit control of non-REM sleep substates - ScienceDirect