Last week during my sleep deprived EEG there was a deep breathing section. After the deep breathing portion pretty much my whole chest felt warm. I've never had that happen even during cardio exercise when I have been breathing hard over an extended period. In some ways I'm hoping, not that I wanted a seizure, that it was something other than just the deep breathing. My EEGs seem to always come back normal. They normally seem to get you when no abnormal activity is ongoing.