Macroscopic Neural Oscillation during Skilled Reaching Movements in Humans

Figure 1

Experiment paradigm. (a) Illustration of the virtual visual stimuli and MEG acquisition system. MEG signals and hand positions were recorded simultaneously during reaching movements. Subjects were instructed to perform a center-out reaching task according to stereographic images on a screen. The target sphere appeared randomly on one of the four corners (upper-left, upper-right, bottom-left, and bottom-right). The red arrow illustrates the example of the reaching movements when the target is shown at the upper-left. (b) Drawings showing the sequence of visual stimuli and instructed behaviors. At the beginning of the experiments, a sphere was shown on the center of the screen. After 4 s, the target was presented for 1 s on one of the four corners. During this time, the subjects were instructed to shift their index finger from the center to the target and return to the center according to the connecting line by moving their right arm as fast as possible. This sequence was repeated during the experiments.

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