Eeg And | Sleep Physiology Ppt ((free))
Frequent micro-arousals (abrupt shifts to higher EEG frequencies) often caused by Sleep Apnea or Periodic Limb Movement Disorder (PLMD).
Alpha waves drop below 50% of the epoch. They are replaced by low-amplitude, mixed-frequency theta waves (4–7 Hz). Vertex sharp waves may appear at the end of the stage. EOG: Slow, rolling eye movements. EMG: Muscle tone begins to decrease. Stage N2 (Stable NREM Sleep)
– Title, Presenter Name, Institutional Affiliation.
: 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.
: Sleep-deprived EEGs can uncover abnormal activity not seen while awake. Suggested Visuals for Your PPT: eeg and sleep physiology ppt
Sleep EEGs are vital for diagnosing various disorders by tracking abnormal brain waves, breathing, and movement: Neurotech EEG Sleep Apnoea:
Marked by repetitive pauses in breathing, leading to frequent EEG arousals and fragmented N3/REM sleep.
Measures muscle tone, typically using electrodes placed on the chin, which is crucial for identifying the muscle atonia (paralysis) characteristic of REM sleep. 3. EEG Waveforms Found in Wakefulness and Sleep
Waveform Frequency (Hz) Associated State --------------------------------------------------------- Beta 13 – 30 Hz Active wakefulness, intense focus Alpha 8 – 12 Hz Relaxed wakefulness (eyes closed) Theta 4 – 7 Hz Drowsiness and light sleep Delta 0.5 – 3.5 Hz Deep, slow-wave sleep 2. Neurobiology of the Sleep-Wake Cycle Vertex sharp waves may appear at the end of the stage
Tracks eye movements (crucial for identifying REM).
If you'd like to explore this topic further, I can help you with: How do sleep studies diagnose specific disorders? What is the role of light in regulating the sleep cycle? Let me know what you'd like to know next! Share public link
Conditions like sleepwalking occur when a patient gets stuck between deep N3 sleep and wakefulness, creating a state of partial arousal.
: N2 makes up the largest percentage of total night sleep. Stage N2 (Stable NREM Sleep) – Title, Presenter
Should we focus deeper on , or keep it centered on normal physiology? Share public link
: A side-by-side graphic of Alpha vs. Delta waves.
– Core learning goals (understanding waveforms, stages, and neurobiology).
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later.