Musical mirror-symmetrical movement tasks: comparison of rhythm versus melody-playing.

摘要: Bimanual mirror-symmetrical movement (MSM) is relatively easy to control movement. Different MSM tasks may have different activations and interhemispheric interactions. The purpose of this study compare anatomo-physiological features such as hemispheric dominance two MSMs, namely melody-playing rhythm. We examined functional MRI (fMRI) recordings in a group fifteen right-handed pianists performing separate tasks: bimanual rhythm on keyboards with standard key order for right hand reversed left hand, which allows homolog fingers' movements. Activations laterality indices fMRI were examined. results show that significant cerebellar (especially anterior cerebellum) both groups. Significant primary sensorimotor cortical are observed the group. While there also bilaterally symmetric activations, suggest overall lateralization towards hemisphere fronto-parietal cortex, putamen thalamus conjunction cortico-thalamo-cerebellar loop be dominant loop. Dynamic causal modeling (DCM) indicates presence influences from cerebral cortex. In conclusion, complex in-phase task help activate bilateral areas, according DCM results. On other simpler subcortical might independent voluntary task.