Hypergraphia and /or a pressure to speak excessively without knowing why ,wanting to or being able to stop is a symptom of temporal lobe epilepsy, a condition of reoccurring seizures caused by excessive neuronal activity, but it is not a common symptom among patients.
Kindling (direct energy ) induced in rodents by repeated electrical stimulation of sensitive brain regions demonstrate that structural damage of the brain may lead to spontaneously recurrent convulsions in rats and that kindling may be involved in the evolution of such a condition. This finding suggests that kindling mechanisms underlie the development of epileptic foci from structural brain lesions. Such mechanisms may be involved in the etiology of some forms of epilepsy in humans.
Kindling models respectively caused gross edema in the palatal and orbital membrane with repeated spaced delivery of high-frequency stimulation.