This pins goes more deeply into EEG brain wave patterns. Each stage is depicted with its correlated EEG. Each wave is different going from alpha waves to delta waves. And all changing drastically between stages.
During REM sleep a sleepers brain waves demonstrate characteristics that are similar to waking sleep; a combination of alpha, beta, and desynchronous waves.
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Chronic use of amphetamine/stimulants is associated with shortened sleep duration and REM suppression, which is due to the direct effects of the drugs releasing dopamine and noradrenaline in the brain. Adaptive homeostatic changes occur in the brain so that during the first 2 weeks of withdrawal there is a rebound of both of these. This leads to the clinical symptoms of daytime sleepiness and fatigue, plus the nocturnal effects of increased sleep duration and REM with vivid, unpleasant…
REM sleep is punctuated and immediately preceded by PGO (ponto-geniculo-occipital) waves, bursts of electrical activity originating in the brain stem. These waves occur in clusters about every 6 seconds for 1–2 minutes during the transition from deep to paradoxical sleep. They exhibit their highest amplitude upon moving into the visual cortex and are a cause of the "rapid eye movements" in paradoxical sleep.