Design and Use of an Apparatus for Presenting Graspable Objects in 3D Workspace

The neural principle underlying reach and grasp has been studied extensively in past decades, however, few devices has been developed to enable a flexible combination of both movements in one task. By coupling a custom turning table with a 3-dimensional translational device, our apparatus enable a trial-wise combination of multiple positions in 3-dimensional space, and differently shaped objects in each position. Our apparatus provides a valuable platform to study upper limb function and their underlying neural principles.

It may also facilitate simultaneous reconstruction of reaching and grasping movements in brain-machine interface. Begin by fixing two Y rails onto the top surface of the frame in parallel, by securing the pedestals to the top surface with screws. Then, connect two Y rails with a connecting shaft and two diaphragm couplings.