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EEG (ERP (ERP components (important examples (N200 - mismatch negativity…

- - - - N200 - mismatch negativity component
      - P300 (rare) stimulus is attended
      - N400 unexpected stimulus (e.g. violation of semantics)
      - after 100 ms modulated by attention - N100 and P100 - selective attention
      - <100 ms associated with sensory processes
    - - aaaah not so easy:
        
        sometimes component falls between a range (300 -650), but is still labeled as P300 as reference to its initial discovery at this position
        
        polarity depends also on which electrode is used as active site and reference site
        
        sometimes P1 = first peak after stimulus- position in the waveform
        
        position in the waveform depends on location where it is recorded
  - - - occur at the same time and sum up
  - - - depends on the size of the ERP - for a large component (e.g. P3) 10-30, for a small (like P1) 100-500
      - depends on number of participants
      - size of difference between conditions
  - - - Type I error
- - - - therefore only (mainly) from neurons inf the fissures (sulci)- Lorentz-rule - electrical current - magnetic current -...
- - - - capacitive conduction: two pools of charges separated by an insulating layer - charge difference builds across the insulating layer - negative ions push against one side of the membrane, positive ions accumulate on the other side