I. Introduction
The dynamics of endogenous neuronal activities has been an important issue in neuroscience since it is supposed to take control of most neuronal activities arising in the brain [1]. The huge default-mode functional network of the brain has been usually investigated through resting state neuroimaging data such as electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) [2]–[5]. One of the major goals in resting state neuroimaging research is the reliable inference of functional dynamics of spontaneous neuronal population activities from resting state neuroimaging data. However, it is not straightforward since resting state signals may be significantly affected by non-neuronal physiological factors. On the other hand, the response to stimulation in taskbased experimental paradigm is prominently correlated with brain activities either directly or indirectly.