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.
REM sleep has minute-scale rhythms in mice and humans: A non-binary continuum between phasic and tonic microstates
Rapid eye movements associated with REM sleep is involved in consolidation of visuospatial learning in rats - ScienceDirect
Deep Sleep vs REM: How Deep Sleep Is Different From REM Sleep
The importance of ligand gated ion channels in sleep and sleep disorders - ScienceDirect
What are Sleep Cycles? Learn about REM, Deep, & Light Sleep
Mastering the Art of Sleep: Finding the Perfect Balance of Deep, Light, and REM Sleep
Insomnia insight #66: Rem sleep vs Deep sleep
I'm 15, I sleep walk, I can vividly remember doing part of sleepwalking and I can answer simple questions while sleepwalking. What is this specifically known as and is it different from
Deep Sleep: What Is It and How to Measure and Optimize It