Your talking potentially "unsafe" vs somewhat likely hazard. Most of the "danger" comes from poor isolation. The skin resistance is too high for EEG to cause m

Your talking potentially "unsafe" vs somewhat likely hazard. Most of the "danger" comes from poor isolation. The skin resistance is too high for EEG to cause major problems. I realize the actual standards have requirements that are detailed and somewhat strict. The difference is that ECG has sensors that can directly put current through the path to the heart so the risk is higher if there is a worse-case ESD latchup. 5mA is enough to stop a heart in certain conditions. EEG isn't ECG or EMG and have different characteristics even though they seem vaguely similar. PS. My contact info is in my profile.