Non-REM 1

From EEGpedia
Jump to: navigation, search
  • Slow rolling eye movements (SREMs): SREMs are usually the first evidence of drowsiness seen on the EEG. SREMs disappear in stage II and deeper sleep stages.
  • Decrease of alpha rhythm
  • Central or frontocentral theta activity
  • Enhanced beta activity
  • POSTS (Positive occipital sharp transients of sleep)
  • Vertex waves
  • Hypnagogic hypersynchrony: Normal variant of drowsiness in children aged 3 months to 13 years. Paroxysmal 3-5 Hz bursts of high-voltage (as high as 350 µV) sinusoidal waves, maximally expressed in the prefrontal-central areas

Non REM 1 sleep with slow rolling eye movements and vertex wave in a young adult (source) Non REM 1 SREM (source) EEGpedia.png

POSTS and vertexwaves in a young female adult in non REM 1 sleep (source) POSTS en vertexwave (source) eegpedia1.png