“…Cerebellar tDCS studies using an online protocol applied tDCS during a variety of tasks: in the adaptation phase of a motor learning protocol (Galea et al, 2009 ; Jayaram et al, 2012 ; Block and Celnik, 2013 ; Hardwick and Celnik, 2014 ; Herzfeld et al, 2014 ; Avila et al, 2015 ; Calzolari et al, 2015 ; Panouillères et al, 2015a , b ; Yavari et al, 2016 ) during the learning/(mental) practicing of a task (Foerster et al, 2013 ; Shah et al, 2013 ; Dutta et al, 2014 ; Cantarero et al, 2015 ; Van Wessel et al, 2016 ; Wessel et al, 2016 ) or during the acquisition phase of a conditioned response (Zuchowski et al, 2014 ). Most studies, however, used an offline application of cerebellar tDCS, especially when clinical study populations were involved (Grimaldi and Manto, 2013 ; Bradnam et al, 2014 ; Gironell et al, 2014 ; Grimaldi et al, 2014b ; Ho et al, 2014 ; Benussi et al, 2015 ; Bersani et al, 2015 ; Bradnam et al, 2015 ; Minichino et al, 2015 ; Bation et al, 2016 ; Ferrucci et al, 2016 ). In only one study, performed by Calzolari et al ( 2015 ), online cerebellar stimulation was used in a single patient, applying cerebellar tDCS during a prism adaptation task.…”