Eeg And Sleep Physiology Ppt _verified_

seconds), which fragment sleep and eradicate deep N3 and REM stages.

Measures muscle tone (typically placed on the chin). ECG/EKG: Monitors cardiac rhythm.

Caused by a profound loss of orexin-producing neurons. Clinically, it manifests as Sleep-Onset REM Periods (SOREMPs) , where the patient bypasses NREM sleep and plunges directly into REM within 15 minutes of sleep onset. Parasomnias:

Represents the accumulation of neurochemical sleep propellants, primarily adenosine, in the brain during prolonged wakefulness. The longer an organism remains awake, the higher the sleep debt, which dissipates during sleep. eeg and sleep physiology ppt

Before the advent of EEG, sleep was considered a monolithic state of rest. In 1953, the discovery of Rapid Eye Movement (REM) sleep by Aserinsky and Kleitman at the University of Chicago revolutionized our understanding of the brain. For the first time, researchers demonstrated that the brain undergoes a predictable, cyclic pattern of activity throughout the night, alternating between REM and Non-REM (NREM) periods.

Characterized by an Alpha rhythm (8–12 Hz) occupying more than 50% of the epoch in the occipital channels when eyes are closed. If eyes are open, low-amplitude, mixed-frequency beta activity dominates. EOG: Blinks, rapid eye movements, or reading eye movements. EMG: Relatively high, tonic muscle activity. 2. Stage N1 (Non-REM Stage 1) - Drowsiness / Transition

Sharp negative high-voltage peaks followed by a slower positive complex, lasting at least 0.5 seconds. EOG: No eye movements. EMG: Low to moderate tone. Non-REM Stage 3 (N3): Slow-Wave Sleep (SWS) seconds), which fragment sleep and eradicate deep N3

Tonic muscle activity decreases slightly compared to wakefulness. 3. Stage N2 (Non-REM Stage 2) - Light Stable Sleep

EEG and Sleep Physiology: A Comprehensive Guide to Sleep Stages & Brain Activity

A distinct alpha rhythm (8–12 Hz) appears over the occipital channels. EMG: High muscle tone. Stage N1 (Light Sleep / Transition) Caused by a profound loss of orexin-producing neurons

Phasic REM is marked by bursts of eye movements and muscle twitches; tonic REM is the quiet interval between these bursts. Summary Table for Presentation Slides

By anchoring the physiological changes to the visual patterns on the EEG, your audience will not memorize lists—they will understand the architecture of slumber.

: Sleep is an active, regulated state of unconsciousness where the brain is primarily reactive to internal stimuli.