| Mirror activity in the human brain while observing hand movements: a comparison between EEG desynchronization in the mu-range and previous fMRI results. | |
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MedLine Citation:
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PMID: 19500557 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Mu (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 mu rhythms (mu 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 mu rhythms and the MNS, by finding parallels between the reported patterns of fMRI activations and patterns of mu suppression. The EEG power in the mu 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. Mirroring fMRI results (Shmuelof, L., Zohary, E., 2005. Dissociation between ventral and dorsal fMRI activation during object and action recognition. Neuron 47, 457-470), mu suppression was larger in the hemisphere contra-lateral to the moving hand and larger when the hands grasped different objects in different ways than when the movement was repetitive. No suppression was found while participants observed still objects but mu suppression was also found while seeing static grasping postures. These data are discussed in light of similar parallels between modulations of alpha waves and fMRI while recording EEG in the magnet. The present data support a link between mu suppression and a human MNS. |
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Authors:
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Anat Perry; Shlomo Bentin |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2009-06-03 |
Journal Detail:
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Title: Brain research Volume: 1282 ISSN: 1872-6240 ISO Abbreviation: Brain Res. Publication Date: 2009 Jul |
Date Detail:
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Created Date: 2009-07-13 Completed Date: 2009-10-09 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0045503 Medline TA: Brain Res Country: Netherlands |
Other Details:
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Languages: eng Pagination: 126-32 Citation Subset: IM |
Affiliation:
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Department of Psychology, The Hebrew University of Jerusalem, Jerusalem 91905, Israel. anat.perry@mail.huji.ac.il |
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Alpha Rhythm Brain Mapping Cerebral Cortex / anatomy & histology, physiology* Cortical Synchronization* Electroencephalography Evoked Potentials / physiology* Female Functional Laterality / physiology Hand / innervation, physiology* Humans Imitative Behavior / physiology* Magnetic Resonance Imaging Male Motor Cortex / anatomy & histology, physiology Movement / physiology* Neuropsychological Tests Photic Stimulation Psychomotor Performance / physiology Young Adult |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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