Originally posted by adrenaline
Never seen one, but I know there is a lot of controversy if this related to interictal (between periods of epilepsy) personality changes or not.
Eve La Plante goes into great detail about the syndrome and the controversy in her book
Seized. It is not found in all people with epilepsy, only those with temporal lobe (or more accurately, temporolimbic) involvement.
a lot of people with Epilepsy just don't want to hear about it, regarding it as just another stigma to add to what they already have. The Epilepsy Foundation of America, and many neurologists deny it's existence out of loyalty to their patients for the same reason (according to La Plante).
It is being mentioned however in newer books more and more in a partially euphemized way: "You and your family members may notice changes in your personality after the onset of seizures..." that sort of thing.
I believe this diagnosis has also been found in those not suffering seizures...
If you recall where you read this I'd be interested in reading it. This is the first I've heard of that. You may be thinking of
hypergraphia, one of the common elements of Geschwind's. Forms of hypergraphia have been noted in bipolar, obsessive-compulsive, Asperger's, and Basilar Migraine patients, that I know of. Geschwind's has a lot more to it than just hypergraphia.
I mention Geschwind's because it will present as a "Personality Disorder Not Otherwise Specified" to shrinks who haven't heard about it, when the symptoms are on the extreme side.
One aspect of it is a meticulous attention to detail and preoccupation with clarity of thought. Something to consider in Newton's case for anyone into retroactive diagnosis of greats of the past.