Eeg And Sleep Physiology Ppt __exclusive__ [TESTED]

EEG and Sleep Physiology: A Comprehensive Overview Electroencephalography (EEG) is the primary tool used to study the neurophysiological changes that occur during sleep. By recording electrical activity from the scalp, EEG allows researchers and clinicians to categorize sleep into distinct stages and identify physiological markers of health and disorder. 1. Fundamentals of Sleep EEG

7. Functional Roles of Sleep EEG Oscillations

• Memory consolidation:
  • Thalamus plays a central role in generating rhythmic oscillations; interplay between thalamic relay neurons and reticular thalamic nucleus produces spindles and slow waves.

  EEG Signature: Alpha waves disappear and give way to low-voltage, mixed-frequency Theta waves. eeg and sleep physiology ppt

  Key Regulatory Mechanisms (The "Two-Process Model"): Memory consolidation:

  N1 (Light Sleep): Transition from wakefulness; characterized by theta waves. Thalamus plays a central role in generating rhythmic

• REM Sleep: Characterized by rapid eye movements, increased brain activity, and vivid dreams.
• Brain waves represent the summation of postsynaptic potentials (EPSPs and IPSPs) from large groups of pyramidal neurons.
• Synchronization vs. Desynchronization:
  • N1 sleep: Mix of alpha, theta, and delta waves
  • N2 sleep: Theta waves and occasional alpha waves
  • N3 sleep: High-amplitude delta waves
  • REM sleep: Mix of beta, alpha, and theta waves