I know that some authors applied TMS to depolarize interneurons of the cerebellum. With EMG (and in combination with conditioning methods, i.e. H-reflexes) changes in motor control associated with a modulated excitability of the cerebellum can be displayed.
See Article Role of the cerebellum in time perception: ATMS study in nor...
I'm no expert in this area, but I have heard colleagues discuss fMRI techniques for assessing the function of different brain regions. Here is a paper which you might find useful;
Stoodley CJ, Valera EM, Schmahmann JD. Functional topography of the cerebellum for motor and cognitive tasks: an fMRI study. Neuroimage. 2012 Jan 16;59(2):1560-70.
Thank you so much for your useful guidance. Also we want to know that it is measurable by EEG or it is excitable by tDCS. We pleasure for your guidance.