EEG-based sleep monitoring is essential for identifying various conditions: Sleep Apnea Narcolepsy Parasomnias (Sleepwalking, Night Terrors)
: Patients awakened from N1 often feel like they never fell asleep.
– Visual chart comparing Beta, Alpha, Theta, and Delta waves.
Diagram of a pyramidal neuron in the cortex with EPSPs (Excitatory Post-Synaptic Potentials) occurring at the dendrites. Bullet Points: eeg and sleep physiology ppt
: The EMG channel drops to its lowest baseline level of the entire night. The brain sends inhibitory signals down the brainstem to alpha motor neurons, preventing the physical acting out of dreams. Slide 9: Neural Mechanisms Driving Sleep Physiology
: Cortical responses to internal or external stimuli, representing a mechanism that keeps the cortex suppressed. Slide 7: Non-REM Stage N3 – Slow-Wave Sleep (SWS) Core Concept : Deep, highly synchronized, restorative sleep.
Relaxed wakefulness with eyes closed; highest in occipital leads. 4 – 7 Hz Drowsiness, light sleep (Stage N1). Delta (δ) High (> 75 µV) Deep slow-wave sleep (Stage N3). Slide 4: Sleep Architecture and the Hypnogram Bullet Points: : The EMG channel drops to
Analyzing the sleep EEG allows physicians to identify neurological and respiratory disruptions. Micro-Arousals
An EEG, or , is a non-invasive test that uses small metal discs called electrodes attached to the scalp to measure electrical impulses produced by brain cells. These impulses appear on a recording as wavy, variable-frequency lines.
An electroencephalogram (EEG) measures and records the electrical activity of populations of neurons in the brain. It utilizes electrodes placed on the scalp to detect postsynaptic potentials. In sleep medicine, the EEG is the most critical component of a Polysomnography (PSG) study—the gold standard diagnostic test for sleep disorders. The Role of EEG in Sleep Analysis Slide 7: Non-REM Stage N3 – Slow-Wave Sleep
: EEG is a core component of polysomnography , used to differentiate between wakefulness and various sleep stages. 2. Core EEG Waveforms
EEG measures the collective electrical activity of cortical neurons. In sleep studies, it transforms invisible neurological transitions into predictable, visual waveforms. The Biophysical Basis
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