: Mention how dropped oxygen levels or movement disorders like Restless Leg Syndrome create characteristic changes on a sleep EEG. 4. Summary Table for Reference Dominant EEG Pattern Notable Features Wake Beta/Gamma waves Alertness, high muscle tone N1 Theta waves Transition stage, POSTS N2 Spindles & K-complexes Majority of total sleep time N3 Delta waves Deepest sleep, restorative REM "Sawtooth" waves Dreaming, muscle atonia Resources for Further Reading Review the Physiology of Sleep Stages at StatPearls . Explore Normal Sleep EEG Patterns on Medscape . See visual waveform examples on Learning EEG .
Electroencephalography (EEG) is the primary noninvasive tool for measuring brain electrical activity and is central to characterizing sleep. Sleep is an active, regulated physiological state composed of multiple stages with distinct EEG signatures that reflect underlying neural network dynamics. Understanding EEG patterns across wakefulness and sleep informs basic neuroscience, clinical sleep medicine, and cognitive research. eeg and sleep physiology ppt