Beta-band desynchronization reflects uncertainty in effector selection during motor planning

摘要: While beta-band activity during motor planning is known to be modulated by uncertainty about where act, less its modulations how act. To investigate this issue, we recorded oscillatory brain with EEG while human participants (n = 17) performed a hand choice reaching task. The was either predetermined or of choice, and the target close one two hands at equal distance from both. measure neural in motion-artifact-free time window, location upcoming cued 1000-1500 ms before presentation target, whereby cue valid 50% trials. As evidence for cueing phase, behavioral observations showed that affected later choice. Furthermore, reaction times were longer than trials, supporting notion competitive process selection. Modulations power over central cortical regions, but not alpha-band theta-band power, line these observations. During period, reaches trials preceded larger decreases Cue direction did affect which may due being invalid retaining effector planning. Our findings suggest uncertainty, similar selectively modulates New & NoteworthyWhile reach-related areas modulate number potential targets, here show, using paradigm, frequency band, alpha theta-band, also use. This finding supports multiple possible effector-specific actions can specified parallel up level preparation.