Who’s still afraid of the link between headache and epilepsy? Some reactions to and reflections on the article by Marte Helene Bjørk and co-workers

I was delighted to be invited to comment on the article by Marte Helene Bjørk and co-workers entitled ‘‘Interictal quantitative EEG in migraine: a blinded controlled study’’, published in this issue of The Journal of Headache and Pain [1]. I was delighted for three reasons. Firstly, because this article makes a major effort to shed light on the interictal cortical excitability changes using a quantitative EEG (QEEG) investigation in migraine-affected subjects. Secondly, because this commentary offers me the opportunity to stress the need to, respectively, define and revise criteria in both the International League Against Epilepsy (ILAE) classification and International Classification of Headache Disorders Second-Revision (ICHD-II). Indeed, to date neither the International Headache Society nor the International League against Epilepsy mention that headache/ migraine may, on occasion, be the sole ictal epileptic manifestation.