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Locating the EEG positions T3 & P3
Dr. Rustin Berlow locates the EEG positions T3 & P3 for TMS location targeting.
The location of stimulation in between EEG positions T3 and P3
This is the location of the preauricular point, right in front of the ear, and because we know that the distance from tragus to tragus is 38(cm), we can measure the distance above the preauricular point, and it will be 3.8(cm). So that would be EEG position T3. Now, since P3 is here (points to P3), and some sources say halfway between T3 and P3, we go right there (points at the position halfway between T3 and P3).