This Presentation discusses the variously commonly seen artifacts in EEG, and how to recognize them. In EEG interpretation, it is often more important to identify an artifact than to identify true pathology. Once all the artifacts are ruled out, one is sure that what one is dealing with represents disease/abnormality

1. Artifacts in EEG
Dr. Rahul Kumar

2. Recording EEG
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EPSP at apical dentritic trees
of pyramid cells
Dentritic membrane 
depolarized
Potential difference cause a
current  flow through
volume conductor from the
nonexited membrane of the
soma to the apical dentritic
tree
Extracellular currents =
secondary / volume currents

3. The EEG machine
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8 – 64 identical channels
recording simultaneously
from as many different pairs
of electrodes
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Electrodes & electrode board
Amplifiers
Filters
Pen & chartdrive (screen)
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4. Artifacts
Physiologic artifacts
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Eye movement
Muscle activity
ECG artifacts
Skin artifacts
Extraphysiologic artifacts
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Electrodes
Alternating current (60 Hz)
artifact
Movements in the
enviroment

9. Photomyoclonic Response

11. NHIỄ U (ARTIFACTS)

12. NHIỄ U (ARTIFACTS)

13. NHIỄ U (ARTIFACTS)

19. NHIỄ U (ARTIFACTS)

20. NHIỄ U (ARTIFACTS)

25. SUMMARY

26. Artefacts in EEG Recordings

27. Artefacts in EEG Recordings

28. Artefacts in EEG Recordings