Σφακιανάκης Αλέξανδρος
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Κυριακή 29 Οκτωβρίου 2017

Reduced motor cortical inhibition in migraine: A blinded transcranial magnetic stimulation study

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Publication date: December 2017
Source:Clinical Neurophysiology, Volume 128, Issue 12
Author(s): J.P. Neverdahl, P.M. Omland, M. Uglem, M. Engstrøm, T. Sand
ObjectiveTo investigate motor cortical excitability, inhibition, and facilitation with navigated transcranial magnetic stimulation (TMS) in migraine in a blinded cross-sectional study.MethodsResting motor threshold (RMT), cortical silent period (CSP), short-interval intracortical inhibition (SICI), and intracortical facilitation (ICF) were compared in 27 interictal migraineurs and 33 controls. 24 female interictal migraineurs and 27 female controls were compared in subgroup analyses. Seven preictal migraineurs were also compared to the interictal group in a hypothesis-generating analysis. Investigators were blinded for diagnosis during recording and analysis of data.ResultsSICI was decreased in interictal migraineurs when compared to healthy controls (p=0.013), CSP was shortened in female interictal migraineurs (p=0.041). ICF was decreased in preictal compared to interictal migraineurs (p=0.023). RMT and ICF were not different between interictal migraineurs and controls.ConclusionCortical inhibition was decreased in migraineurs between attacks, primarily in a female subgroup, indicating an importance of altered cortical inhibition in migraine.SignificancePrevious studies on motor cortical excitability in migraineurs have yielded varying results. This relatively large and blinded study provides support for altered cortical inhibition in migraine. Measuring intracortical facilitation in the period preceding migraine attacks may be of interest for future studies.



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