Which motor cortical region best predicts imagined movement?
- Which motor cortical region best predicts imagined movement?
- 박창현; 장원혁; 이민지; 권규현; 김래현; 김성태; 김연희
- fMRI; Multivariate Bayes; Motor imagery; Motor execution; Motor cortex
- Issue Date
- VOL 112, 101-110
- In brain-computer interfacing (BCI),motor imagery is used to provide a gateway to an effector action or behavior. However, in contrast to themain functional role of the primarymotor cortex (M1) in motor execution, the M1's involvement inmotor imagery has been debated, while the roles of secondary motor areas such as the premotor cortex (PMC) and supplementarymotor area (SMA) inmotor imagery have been proposed. Weexaminedwhich motor cortical region had the greatest predictive ability for imaginedmovement among the primary and secondary motor areas. For two modes of motor performance, executed movement and imagined movement, in 12
healthy subjects who performed two types of motor task, hand grasping and hand rotation, we used the multivariate Bayes method to compare predictive ability between the primary and secondary motor areas (M1, PMC, and SMA) contralateral to themoved hand.With the distributed representation of activation, executed movementwas best predicted from theM1while imagined movement from the SMA, among the three motor cortical regions, in both types of motor task. In addition, the most predictive information about the distinction between executed movement and imagined movement was contained in the M1. The greater predictive ability of the SMA for imaginedmovement suggests its functional role that could be applied tomotor imagery-based BCI.
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