Definitely! My understanding is that a positive EEG is positive for seizures, a negative EEG doesn't mean no. And there are different causes of seizures. (I still don't understand it all....there are seizures and then there is epilepsy?) But fwiw, I have seizures and had a negative VEEG and sleep-deprived EEG. Although the doctors don't know the cause of my seizures (witnessed in the ER, so there's no doubt), I suspect there's hormonal imbalance involved so my brain isn't always unstable. Add stress to the mix (which wasn't there when I was away from two kids and graduate school, spending 48 hours in bed with a pile of books! ) during the time right before my period and I get explodohead. But the rest of the month....nah. My head apparently then looked just peachy.