Introduction: Sensorimotor Rhythm (SMR), 12 to 15 Hz oscillation of the sensorimotor cortex, showed to be promising as a link between adaptive mental states (automatic attention process-related ) and skilled visual-motor performance. This study examined the SMR power during performs in-phase and anti-phase patterns in bimanual coordination at different speeds.
Methodology: Participants (n=20; aged 19-24 years) performed bimanual in-phase and anti-phase movements with their wrists at three levels of speed ranging from slow to fast while EEG was recorded. The neurofeedback consisted of SMR frequency of 12-15 Hz at Cz, C3 and C4. To analyze data, descriptive statistics and Two-way (2 bimanual coordination patterns × 3 Speed) analyses of variance for repeated measures (ANOVA) were performed using Statistic software (SPSS version.18). Significant results of interest were examined post-hoc using pairwise comparisons with Bonferroni correction.
Results: Results showed that SMR power was higher in anti-phase than in-phase. In addition, the results indicated that manipulation of speed affected on SMR power and led to SMR power increase in anti-phase at the same time increasing speed, but SMR power did not increased when the in-phase pattern were performed.
Discussion: We concluded that more attention needs to anti-phase pattern, requires more SMR power wave. In addition, by increasing the amount of SMR power, bimanual linear task can be taken better.