EEG, along with EOG (eye movement) and EMG (muscle tone) in a polysomnogram (PSG), allows for the classification of sleep stages, enabling the study of sleep disorders and cognitive function.
Visual: Diagram of a human head illustrating the anatomical positions of the International 10-20 system (
REM sleep accounts for 20% to 25% of sleep time, occurring predominantly in the latter half of the night. This is the stage most closely associated with vivid, narrative dreaming. eeg and sleep physiology ppt
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Relaxed wakefulness with eyes closed; maximally attenuated over the occipital regions. 4 – 7 Hz Drowsiness, Stage N1 sleep, and prominent during REM sleep. Delta ( ) 0.5 – 2 Hz EEG, along with EOG (eye movement) and EMG
Final summary emphasizing sleep staging as a vital window into brain health.
Understanding these bands is essential for interpreting sleep. Here is a quick reference for your PPT slides: Do you need help formatting for any specific slides
The most restorative stage of sleep. This is when tissue repair, growth hormone release, and immune system strengthening occur.
: A side-by-side graphic of Alpha vs. Delta waves.