The reach-to-grasp movement exhibits both parallel and serial combinations of tightly scheduled movement components. Among the movement components are a free movement phase involving transport and pre -shaping of the hand, and in-contact phases, involving grasping, lifting, and manipulation of objects with appropriate forces. Several factors are known to influence the shape of the hand (hand preshaping) during a reach-to-grasp movement, including the initial aperture of the fingers, object size, or movement speed. Moreover, the spatio-temporal specification of the parameters for hand pre-shaping may evolve gradually during the reach-to-grasp movement. in this paper we simulate three computational models of coordination between hand transport and hand preshaping under different initial finger aperture conditions to investigate the spatio-temporal dynamics of hand pre shaping.
展开▼
