Neurophys - EEG

Card Set Information

Author:
jollyvulcan
ID:
151494
Filename:
Neurophys - EEG
Updated:
2012-09-03 07:38:04
Tags:
EEG
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Description:
EEG Normal Variants, Abnormalities, and Sleep
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  1. Name this EEG Artifact ...
    Electrode Pop
  2. Name this EEG Artifact ...
    Eye Blinks
  3. Name this EEG Artifact ...
    Slow roving eye movements
  4. What is depicted here ...
    • 14 and 6
    • Bursts of arch shaped waves maximal over the
    • posterior temporal area
    • Most common in deep drowsiness and light sleep
    • 3 y/ - young adult peaking at 13 – 14 years old
  5. What is depicted here ...
    Benign Epileptiform Transients of Sleep (BETS)

    • sharps that occur bilaterally in the temporal lobes during sleep
    • Normal variant that is rare in children but more common in adults / elderly where they may be seen in 20-25%
    • Occur during deep drowsiness
  6. What is depicted here ...
    K-Complexes

    • High-amplitude, delta frequency waves with sharp apex
    • Generalized and symmetric with a frontal predominance
    • Noted during Stage II sleep and with arousals
    • Followed by runs of rhythmic theta
  7. What is depicted here ...
    Lambda Waves

    • Sharp transients in the occipital region while awake
    • Bilateral, positive, triangular, symmetrical, occipital
    • Occurs with visual scanning
    • Most common in 3-12 y/o (80%)
    • Usually bilaterally synchronous and will attenuate with eye closure or darkness
  8. What is depicted here ...
    Mu

    • Runs of central alpha frequency (8-10 HZ)
    • <5% of children <4 and 18-20% of children 8-16
    • Thought to be sensorimotor cortex at rest
    • Always rounded in one direction and sharp in the other
    • Disappear with motor activity in the contralateral arm / hand but unlike alpha are not affected by visual stimuli
    • More common after surgery when the skull have been removed
  9. What is depicted here ...
    Positive Occipital Sharp Transients of Sleep (POSTS)

    Bilateral, positive, triangular, symmetrical, occipital that occur during sleep ("reverse check mark")
  10. What is depicted here ...
    Posterior Slow Waves of Youth


  11. What is depicted here ...
    V Waves
  12. What is depicted here ...
    Wicket Spikes

    • Most common >30 y/o and usually >50 y/o - ~1%
    • 6-11 Hz negative sharps seen in the anterior / mid temporal
    • Facilitated by drowsiness
    • Unilateral with a shifting asymmetry
  13. What is depicted here...
    REM Sleep
  14. What is depicted here ...
    Stage 1 Sleep
  15. What is depicted here ...
    Stage 2 Sleep
  16. What is depicted here ...
    Stage 3 sleep
  17. What is depicted here ...
    Stage 4 Sleep

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