AUTHOR=Cantone Mariagiovanna , Lanza Giuseppe , Ranieri Federico , Opie George M. , Terranova Carmen TITLE=Editorial: Non-invasive Brain Stimulation in the Study and Modulation of Metaplasticity in Neurological Disorders JOURNAL=Frontiers in Neurology VOLUME=12 YEAR=2021 URL=https://www.frontiersin.org/journals/neurology/articles/10.3389/fneur.2021.721906 DOI=10.3389/fneur.2021.721906 ISSN=1664-2295