EEG, Electroencephalography - Is That Right?

Hans Berger, probably, who was able to record EEG signals from the scalp and showed that it was modulated by your level of arousal. That was a very... It was a microvolt electric signal, but that was a clear indication that there was electrical signals flying around inside the brain. So when was that, like 1920s or something? Or was that ... No, no, like 1910, something around there, 12. Around the same time as electrocardiography was being invented. Is that right? Well, that was EEG, electroole encephalography. I mean, the heart version of that, the EKG. Yes, okay, electrocardiology. Yeah