, where large groups of neurons fire in rhythmic, slow patterns. Stages of Sleep Physiology
Electroencephalography (EEG) is the cornerstone of modern sleep medicine. By recording the brain's electrical activity, EEG allows scientists and clinicians to peer into the sleeping brain, mapping out distinct stages and identifying sleep disorders.
Waveform Frequency (Hz) Associated State --------------------------------------------------------- Beta 13 – 30 Hz Active wakefulness, intense focus Alpha 8 – 12 Hz Relaxed wakefulness (eyes closed) Theta 4 – 7 Hz Drowsiness and light sleep Delta 0.5 – 3.5 Hz Deep, slow-wave sleep 2. Neurobiology of the Sleep-Wake Cycle eeg and sleep physiology ppt
Disrupted slow-wave sleep transitions can trigger sleepwalking or night terrors (NREM parasomnias), while a lack of muscle atonia during REM indicates REM Sleep Behavior Disorder (RBD). 5. Slide-by-Slide PPT Presentation Outline
Tie the physiology back to clinical practice to keep your audience engaged. , where large groups of neurons fire in
Low-amplitude, mixed-frequency, desynchronized beta waves (13–30 Hz).
What is the for this presentation? (e.g., undergraduate students, medical residents, general public) eeg and sleep physiology ppt
Stage N1 – Drowsiness (Light Sleep) Content:
Occipital alpha waves are replaced by low-amplitude, mixed-frequency (LAMF) activity covering 4–7 Hz (theta range).
Absence of slow rolling eye movements; stable, moderate muscle tone. Stage N3: Deep Sleep (Slow-Wave Sleep / SWS)
: It transforms invisible neural networks into measurable waveforms, making it the backbone of Polysomnography (PSG).