@A MyEpilepsyTeam Member , Can it happen? Yes. Does it happen all of the time? No. I don't have stats or studies to share but from what I understand, heredity and lifestyle are the biggest influences of Alzheimer's and Dementia.

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A MyEpile...

However, if you read Kurt Eichenwald's book, then you would have an excellent example of when an EEG can miss epileptic seizure activity. He had already been diagnosed to have Epilepsy. He was in the hospital because a research neurologist had been treating him. The doctor checked the level of the anticonvulsant in his body only the first time and then never checked again. When Kurt was in the ER at the Chicago hospital, the level of the anticonvulsant was so high that it was a toxin with the label "organ killer". They managed to get all of the blood out of his body and replace it with fresh blood before any organs were killed by the toxin in the blood. He was then placed in EEG Long Term Monitoring while he was recovering.
Kurt's medical record indicated that he had grand mal seizures (1979), yet because he is having them and the EEG is not indicating any epileptic seizure pattern, the neurologist had the gall to tell him that he had hysteria. And Kurt was sent to a neuropsychiatrist at the hospital. And a few minutes into conversing with Kurt (no visible testing being done thus confusing Kurt), he tells Kurt that he does not have hysteria. And then the doctor explains to Kurt that there are some traits of hysteria that are always visible and easy to spot by a professional who knows them, thus why he knew he did not have hysteria. And then the neuropsychiatrist called the neurologist and told him that Kurt did not have hysteria. And the arrogant neurologist dared to tell a neuropsychiatrist that he knows how to recognize hysteria better than him.

EEGs just like every other device created by human beings (because human beings are not perfect either) can have cases where they do not pick up a reading of an epileptic seizure even when one is occurring. However, if you interviewed a 1000 neurologists, then you would be lucky to get 1 or 2 that would acknowledge that this was possible. Even when the person is someone who has been diagnosed with grand mal seizures and the video is showing a grand mal seizure, they do not believe that it is one because the EEG does not pick up any epileptic seizure activity.

And it even more challenging to tell because of other factors involved. Read the details via this link to the National Institute of Aging page on Dementia.
https://www.nia.nih.gov/health/what-is-dementia

@A MyEpilepsyTeam Member. I believe only my mother's and father's doctor and maybe my primary doctor maybe have some of this medical history but not my neurologist which is why I wanted to discuss and update it with him at my upcoming visit it would also be useful as I've donated my brain to epilepsy research when I pass away because of the severity of my epilepsy and my sezuire disorder as I've had it all my life and developed the sezuire disorder when I was 5 years old and as I get older turning 51 this April I want to find out just where I stand with all this new information and even though I was doing better things then turned for the worst.

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A MyEpile...

no. seizures themselves have a recovery time. now if there is family history outside of epilepsy, then possibly. example: john doe has epilepsy and a history of heart attack. his wife jane doe has epilepsy and a history of memory issues. john is worried about the about the heart on a seizure website. it is possible but it is on the wrong site.