Abstract
Physical rehabilitation training is the most effective way to restore the motor ability of people who suffer from severe neurological problems. Brain activity imaging can be used as feedback control for medical rehabilitation devices and help to adjust rehabilitation strategies. The popular noninvasive brain activity imaging techniques, namely, fMRI, fNIRS, MEG, and EEG. From those techniques, EEG has some advantages in temporal resolution, portability, and relatively low cost. Processing EEG signal based on direct recording has an inherent problem. This problem has the potential to solve through EEG source localization. The essential idea of source reconstruction is to estimate primary cortical current densities during the given EEG recording from the head surface. This paper will give a short overview of the basic principle of four brain imaging techniques. The brief concept of EEG’s µ-based feedback control and EEG source localization will be described. Finally, the paper also included a case study of an estimation of the current source distribution in the brain during motor activity as part of medical rehabilitation training is demonstrated.
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