1. Intro to EEG Nicholas J. Beimer, MD

2. Lead placement 10-20 system

3. Common montages longitudinal bipolar transverse

4. Normal 20 year old

8. Frequency ranges of EEG 0.5-4 HzDelta 4-8 HzTheta 8-12 HzAlpha >13 HzBeta * Difference between alpha frequency and alpha rhythm

9. Normal 20 year old 10 Hz PDR (posterior dominant rhythm)

10. Normal PDR by age 3-4 Hz3-4 months 5-6 Hz1 year 7 Hz2 years 8 Hz3 years 8.5 Hz8-10 years

11. Normal

12. Eye closure

13. Normal

14. Alpha squeak: transient increase in alpha rhythm after eye blink

15. Normal

16. Lambda waves: sharply contoured, occipital, occur with visual scanning

17. Normal

18. POSTS: positive occipital sharp transients of sleep

19. Normal

20. Sleep spindles: about 13 Hz, 0.5 sec burst, characteristic of stage II sleep

21. Normal

22. K complex: Negative sharp wave, then slower positive component, associated with spindles

23. Normal

24. Vertex waves

25. Normal

26. Posterior slow waves of youth (prominent in ages 3-10)

27. If this is normal, how old is the patient?

28. Normal 75 year old Age >65: Focal temporal delta slowing once every several minutes Increase in frontal beta PDR still 8.5 hz or greater

29. Normal

30. Hypnagogic hypersynchrony: 4-5 Hz rhythmic bursts in young children, a marker of drowsiness and transitional sleep

31. Normal Rapid lateral eye movements

32. Normal Sawtooth waves: theta frequency, sawtooth shape

33. REM

34. Provocative measures

35. Photic driving

36. Provocative measures Photic driving

37. Provocative measures Slowing with hyperventilation

38. Benign variants

39. Mu: frontocentral alpha rhythm that disappears when pt. opens and closes contralateral hand

40. Benign variants

41. RMTTD: rhythmic temporal theta of drowsiness

42. Benign variants

43. BETS: benign epileptiform transients of sleep

44. Benign variants

45. Wicket spikes

46. Benign variants 14 and 6 positive bursts 14 and/or 6 Hz 6 Hz more common in early childhood 14 Hz more common in late childhood/adolescence

47. Benign variants 14 and 6 positive bursts 14 and/or 6 Hz 6 Hz more common in early childhood 14 Hz more common in late childhood/adolescence