Document Detail

Modulation of gamma and theta spectral amplitude and phase synchronization is associated with the development of visuo-motor learning.
MedLine Citation:
PMID:  21994398     Owner:  NLM     Status:  MEDLINE    
The formation of new motor memories, which is fundamental for efficient performance during adaptation to a visuo-motor rotation, occurs when accurate planning is achieved mostly with feedforward mechanisms. The dynamics of brain activity underlying the switch from feedback to feedforward control is still matter of debate. Based on the results of studies in declarative learning, it is likely that phase synchronization of low and high frequencies as well as their temporal modulation in power amplitude underlie the formation of new motor memories during visuo-motor adaptation. High-density EEG (256 electrodes) was recorded in 17 normal human subjects during adaptation to a visuo-motor rotation of 60° in four incremental steps of 15°. We found that initial learning is associated with enhancement of gamma power in a right parietal region during movement execution as well as gamma/theta phase coherence during movement planning. Late stages of learning are instead accompanied by an increase of theta power over that same right parietal region during movement planning, which is correlated with the degree of learning and retention. Altogether, these results suggest that the formation of new motor memories and, thus, the switch from feedback to feedforward control is associated with the modulation of gamma and theta spectral activities, with respect to their amplitude and phase, during movement planning and execution. Specifically, we propose that gamma/theta phase coupling plays a pivotal role in the integration of a new representation into motor memories.
Bernardo Perfetti; Clara Moisello; Eric Carl Landsness; Svetlana Kvint; Simona Lanzafame; Marco Onofrj; Alessandro Di Rocco; Giulio Tononi; M Felice Ghilardi
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of neuroscience : the official journal of the Society for Neuroscience     Volume:  31     ISSN:  1529-2401     ISO Abbreviation:  J. Neurosci.     Publication Date:  2011 Oct 
Date Detail:
Created Date:  2011-10-13     Completed Date:  2011-12-06     Revised Date:  2014-11-13    
Medline Journal Info:
Nlm Unique ID:  8102140     Medline TA:  J Neurosci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  14810-9     Citation Subset:  IM    
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MeSH Terms
Adaptation, Physiological
Biomechanical Phenomena
Brain Mapping*
Brain Waves / physiology*
Cortical Synchronization / physiology*
Functional Laterality
Learning / physiology*
Photic Stimulation
Psychomotor Performance / physiology*
Reaction Time / physiology
Wavelet Analysis
Young Adult
Grant Support
NS-054864/NS/NINDS NIH HHS; P20 MH077967/MH/NIMH NIH HHS; P20 MH077967-03/MH/NIMH NIH HHS; P20 MH077967-04/MH/NIMH NIH HHS; R01 NS054864/NS/NINDS NIH HHS; R01 NS054864-01A1/NS/NINDS NIH HHS; R01 NS054864-02/NS/NINDS NIH HHS; R01 NS054864-03/NS/NINDS NIH HHS; R01 NS054864-04/NS/NINDS NIH HHS; R01 NS054864-05/NS/NINDS NIH HHS; R01 NS055185/NS/NINDS NIH HHS; R01 NS055185-05/NS/NINDS NIH HHS

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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