Eeg And Sleep Physiology Ppt |work| May 2026

EEG and Sleep Physiology: A Comprehensive Overview Electroencephalography (EEG) is the primary tool used to study the neurophysiological changes that occur during sleep. By recording electrical activity from the scalp, EEG allows researchers and clinicians to categorize sleep into distinct stages and identify physiological markers of health and disorder. 1. Fundamentals of Sleep EEG

Slide 19 — Example Hypnogram + EEG Traces

• Composite slide: hypnogram with aligned 10–20s example traces for Wake, N1, N2 (spindle/K-complex), N3 (delta), REM (sawtooth/atonia)
• Annotated features

Slide 12: Summary & Clinical Pearls

• EEG is the gold standard for staging sleep and diagnosing disorders.
• N3 (Delta) = Deep, restorative sleep; impaired in aging & fibromyalgia.
• REM = Dreaming, paralysis, memory; abnormal REM in narcolepsy (early onset) and depression.
• Common Disorders:
  • EEG: sleep spindles and K-complexes on a background of mixed-frequency, generally lower amplitude.
  • Sleep spindles: 11–16 Hz, typically maximal over central leads; generated by thalamic reticular nucleus interactions.
  • K-complexes: single large biphasic waves (sharp negative deflection followed by positive) maximal frontocentrally; may reflect cortical response to stimuli and gating of sensory input.

  Physiology, Sleep Stages (StatPearls): A concise, clinical summary that defines EEG characteristics for each stage (e.g., delta waves in N3) and their physiological implications. eeg and sleep physiology ppt

  Slide 17 — Polysomnography (PSG) Setup & Sensors

  • Channel list: EEG (recommended leads), EOG, chin/limb EMG, ECG/respiratory belts, oximetry
  • Sampling rates, filter settings, montage suggestions for sleep scoring

  before a test to trigger abnormal electrical activity that only appears when the brain is stressed or transitioning to sleep. Further Exploration Learn about the standard International 10-20 System for electrode placement on Physiopedia Review technical nuances of sleep staging and the visual markers for each phase on Understand how doctors use sleep-deprived EEG tests to diagnose seizures at Kaiser Permanente or a more detailed breakdown of pathological EEG patterns (like spikes or sharp waves)? Slide 12: Summary & Clinical Pearls