Eeg And Sleep Physiology Ppt -

The structural progression of these cycles is visually plotted using a , a time-course graph displaying the time spent in each sleep stage throughout the night.

(0.5–2 Hz). This is the period of physical restoration and hormonal regulation. REM Sleep:

Identified by frequent arousals and fragmented sleep architecture. Narcolepsy: eeg and sleep physiology ppt

(large, singular spikes). These markers are vital for memory consolidation and protecting sleep from external noise. NREM Stage 3 (N3): Slow Wave Sleep (SWS) or Deep Sleep. The EEG is dominated by high-amplitude Delta waves

High amplitude, low frequency. These represent deep, slow-wave sleep (NREM Stage 3). 4. The Stages of Sleep and Their EEG Signatures The structural progression of these cycles is visually

Developmental Changes in EEG Sleep Content:

Normal human sleep does not exist in a static state. Instead, it progresses through predictable, cyclic architecture. A standard night of adult sleep consists of , with each cycle lasting approximately 90 to 110 minutes . Structural Evolution of a Night's Sleep REM Sleep: Identified by frequent arousals and fragmented

Brief bursts of 11–16 Hz activity lasting at least 0.5 seconds.

Scientists realized sleep is not a passive shutdown, but an incredibly active, structured neurological process.

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:

Visual: A line graph showing the accumulation of Adenosine crossing the circadian alertness curve. Content: Definition of PSG. Roles of EEG, EOG, and EMG.