Eeg And Sleep Physiology Ppt Jun 2026

| Sleep Stage | EEG Waveforms | Physiological Changes | | :--- | :--- | :--- | | | Beta (13-30 Hz), Alpha (8-13 Hz, eyes closed). | Alertness, active mental processes, or relaxed wakefulness. | | Stage N1 (Light Sleep) | Theta (4-7 Hz), Vertex waves, Positive Occipital Sharp Transients of Sleep (POSTS), slow rolling eye movements (SREMs). | Transitional phase between wake and sleep. Respiration and heart rate begin to slow. Muscle tone decreases. Individuals are easily aroused. | | Stage N2 (True Sleep) | Theta (4-7 Hz), Sleep spindles (12-14 Hz) , K-complexes . | Body enters deep relaxation. Sleep spindles and K-complexes appear, often linked to memory consolidation. Heart rate, blood pressure, and temperature continue to fall. | | Stage N3 (Deep/Slow-Wave Sleep) | Delta (1-4 Hz), high amplitude. | The deepest, most restorative sleep stage. Muscles are fully relaxed. Heart rate, respiration, and blood pressure are at their lowest levels. Growth hormone is primarily secreted. | | REM Sleep (Stage R) | Sawtooth waves, desynchronized, low-amplitude, mixed-frequency pattern (similar to wakefulness). | "Paradoxical" stage: brain is highly active while body is paralyzed (atonia). Vivid dreaming occurs. Heart rate and blood pressure vary. Penile/clitoral erections occur. |

Disclaimer: This information is for educational purposes only and should not replace professional medical advice.

Mastering EEG and Sleep Physiology: A Complete Guide for Presentations

Electroencephalography (EEG) is the primary tool used to monitor and evaluate brain activity during sleep. By recording the electrical potentials generated by cortical neurons, EEG allows clinicians and researchers to map out the distinct stages of human sleep. Polysomnography (PSG): The Gold Standard eeg and sleep physiology ppt

(Provide specific citations, DOI links, or a curated bibliography when preparing a formal manuscript or slide deck; include recent review articles for up-to-date summaries.)

Short list explaining sleep fragmentation, micro-arousals, and sleep apnea impacts.

– Sawtooth waves, muscle atonia, and rapid eye movements. | Sleep Stage | EEG Waveforms | Physiological

Our internal body clock (influenced by light) that dictates when we feel sleepy or alert.

Characterized by a shortened REM latency (entering REM sleep almost immediately after falling asleep). of these EEG patterns or advanced signal processing techniques?

The in the hypothalamus acts as the primary sleep switch. The VLPO releases GABA and galanin to inhibit the ARAS, allowing the brain to transition into sleep. The Two-Process Model | Transitional phase between wake and sleep

Tracks eye movements, critical for identifying Rapid Eye Movement (REM) sleep.

In sleep medicine, EEG serves as the cornerstone of Polysomnography (PSG)—the official clinical sleep study. 🌊 Slide 3: The 4 Primary Brain Waves