Participant 12 in the WAY-EEG-GAL dataset. 328 grasp-and-lift trials with different weights and surfaces during which EEG, EMG, kinematics, and kinetics were recorded.

Twelve participants performed lifting series in which the object’s weight (165, 330, or 660g), surface friction (sandpaper, suede, or silk surface), or both, were changed unpredictably between trials, thus enforcing changes in fingertip force coordination.

In each of a total of 3,936 trials, the participant was cued to reach for the object, grasp it with the thumb and index finger, lift it and hold it for a couple of seconds, put it back on the support surface, release it, and, lastly, to return the hand to a designated rest position. We recorded EEG (32 channels), EMG (five arm and hand muscles), the 3D position of both the hand and object, and force/torque at both contact plates.