Abstract
Previous functional MRI and brain electrophysiology studies have studied the left-right differences during the tapping tasks and found that the activation of left hemisphere was more significant than that of right hemisphere. In this study, we wanted to delineate this lateralization phenomenon not only in the execution phase but also in other processing phases, such as early visual, pre-executive and post-executive phases. We have designed a finger-tapping task to delineate the left-right differences of event related potentials (ERPs) to right finger movement in sixteen right handed college students. The mean amplitudes of ERPs were analyzed to examine the left-right dominance of cortical activity in the phase of early visual process (75-120ms), pre-execution (175-260ms), execution (310-420ms) and post-execution (420-620ms). In the execution phase, ERPs at the left electrodes were significantly more pronounced than those at the right electrodes (F3 > F4, C3 > C4, P3 > P4, O1 > O2) under the situation without comparing the central electrodes (Fz, Cz, Pz, and Oz). No difference was found between left and right electrodes in other three phases except the C3 electrode still showed more dominant than C4 in the pre- and post-execution phase. In conclusion, the phenomenon of brain lateralization occur major in the execution phase. The central area also showed the lateralization in the pre- and post-execution to demonstrate its unique lateralized contributions to unilateral simple finger movements.
Highlights
IntroductionBabiloni et al (2003) [1] and Gut et al (2007) [2] surveyed the lateralization of brain during finger movement
Previous fMRI brain studies [1,2,3,4] and electrophysiological brain research [5,6,7,8,9] have reported the lateralization during the tapping task and found that the left central electrode activated more significant in the tapping task conducted by the right finger.Babiloni et al (2003) [1] and Gut et al (2007) [2] surveyed the lateralization of brain during finger movement
The event related potentials (ERPs) were reported according to the order of four sequential time windows including early visual phase (75-120 ms), pre-execution phase (175-260 ms), execution phase (310-420 ms) and postexecution phase (420-620 ms)
Summary
Babiloni et al (2003) [1] and Gut et al (2007) [2] surveyed the lateralization of brain during finger movement. In their studies, the voluntary right and left finger movements and complex movements in successive finger-thumb opposition from little finger to index finger were used. The results of Babiloni et al and Gut et al supported the findings from Mattay et al in 1998 [3] and Solodkin et al in 2001 [4] Both Mattay et al and Solodkin et al found the finger movements with the right hand activated predominantly in the left (contralateral) motor areas for the right handers [3,4]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
