Mirror activity in the human brain while observing hand movements: Equivalence between EEG desynchronization in the µ-range and fMRI


Mu (?) rhythms are EEG oscillations between 8–13 Hz distinguished from alpha by having more anterior distribution and being desynchronized by motor rather than visual activity. Evidence accumulating during the last decade suggests that the desynchronization of ? rhythms (? suppression) might be also a manifestation of a human Mirror Neuron System (MNS). To further explore this hypothesis we used a paradigm that, in a previous fMRI study, successfully activated this putative MNS in humans. Our direct goal was to provide further support for a link between modulation of ? rhythms and the MNS, by finding parallels between the reported patterns of fMRI activations and patterns of ? suppression. The EEG power in the ? range has been recorded while participants passively observed either a left or a right hand, reaching to and grasping objects, and compared it with that recorded while participants observed the movement of a ball, and while observing static grasping scenes or still objects. Mi

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Last updated on 01/02/2018