Sensors 2007, 7(6), 960-978; doi:10.3390/s7060960
Article

Time-varying Brain Potentials and Interhemispheric Coherences of Anterior and Posterior Regions during Repetitive Unimanual Finger Movements

1,* email, 1 and 2email
Received: 15 May 2007; Accepted: 12 June 2007 / Published: 14 June 2007
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: Previous brain electrophysiological research has studied the interregionalconnectivity during the tapping task and found that inter-hemispheric alpha coherence wasmore significant under bimanual task conditions than that under unilateral conditions, butthe interregional connectivity situation in the unilateral tapping condition was not exploredclearly. We have designed a unilateral repetitive finger-tapping task to delineate the anteriorand posterior cortex contributions to unilateral finger movement. Sixteen right handedcollege students participated in this study. Event related potentials (ERPs) and the strengthof event related coherence (ERCoh) were analyzed to examine the antero-posterodominance of cortical activity in the phase of early visual process (75-120ms), pre-execution(175-260ms), execution (310-420ms) and post-execution (420-620ms). Results showed thatthe occipital (Oz, O1 and O2), frontal (Fz, F3, and F4), fronto-central (Fz, Cz, F3 and C3),and parietal regions were the most pronounced in the early visual, pre-execution, execution,and post-execution phases, respectively. Moreover, among four inter-hemispheric pairs onlythe Coh (C3 and C4) was significantly correlated to reaction time (RT) of tapping in theexecution phase. In conclusion, the aforementioned variability of electrophysiological data(ERPs and coherence) and the change of antero-postero regional dominance with timereflect the relative importance of different mechanisms in different phases. The mechanismsof visual processing, motor planning, motor execution and feedback reward wereoperational, respectively.
Keywords: Lateralization; event-related potential; cortical connectivity; unilateral movement
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MDPI and ACS Style

Meng, L.-F.; Lu, C.-P.; Chan, H.-L. Time-varying Brain Potentials and Interhemispheric Coherences of Anterior and Posterior Regions during Repetitive Unimanual Finger Movements. Sensors 2007, 7, 960-978.

AMA Style

Meng L-F, Lu C-P, Chan H-L. Time-varying Brain Potentials and Interhemispheric Coherences of Anterior and Posterior Regions during Repetitive Unimanual Finger Movements. Sensors. 2007; 7(6):960-978.

Chicago/Turabian Style

Meng, Ling-Fu; Lu, Chiu-Ping; Chan, Hsiao-Lung. 2007. "Time-varying Brain Potentials and Interhemispheric Coherences of Anterior and Posterior Regions during Repetitive Unimanual Finger Movements." Sensors 7, no. 6: 960-978.

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