Multijoint movements such as reaching are impaired after brain lesions involving
sensorimotor areas and pathways. However, the mechanisms by which such lesions affect …

Background and Purpose—Reaching movements made with the affected arm in hemiparetic
patients are often accompanied by compensatory trunk or shoulder girdle movements, which …

The nervous system controls the behavior of complex kinematically redundant
biomechanical systems. How it computes appropriate commands to generate movements is …

Previous studies have shown that patients with arm and hand paresis following stroke recruit
an additional degree of freedom (the trunk) to transport the hand during reaching and use …

Despite the many studies on the visual control of grasping, little is known about how and
when small variations in shape affect grasping kinematics. In the present study we asked …

Investigation of the human motor system frequently requires precise determination of the
motor response onset indicating the time of movement initiation (eg, in reaction time …

One of the first steps in analyzing kinematic data is determining the beginning and end of
movement segments. This is often done automatically on the basis of one parameter (such …

We previously demonstrated that the hand orientation for grasping (azimuth) is strongly
coupled to arm movement direction in the horizontal plane. The question is whether this …

We rarely experience difficulty picking up objects, yet of all potential contact points on the
surface, only a small proportion yield effective grasps. Here, we present extensive …

Grasping is one of the fundamental actions we perform to interact with objects in real
environments, and in the real world we rarely experience difficulty picking up objects …