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Hemispheric asymmetries in spatial processing are generally considered to be responsible for the shorter reaction time (RT) of the left hand classically observed for right-handers when pointing at targets. Surprisingly, despite the special role which the right cerebral hemisphere is known to play in visual attention, the attentional hypothesis for hand(More)
Right-handers exhibit a left hand advantage in response preparation when pointing to targets. These manual asymmetries are generally attributed to a right hemisphere specialization for spatial processing. More precisely, the left hand reaction time (RT) advantage was recently supposed to reflect specifically the right hemisphere superiority for movement(More)
Directional coding of hand movements is of primary importance in the proactive control of goal-directed aiming. At the same time, manual reaction times are known to be asymmetric when reaching at lateralized targets. Generally, ipsilateral movements and left hand advantages are interpreted using the classical model of interhemispheric transmission for(More)
To what extent does visual feedback shape the coordination between our arms? As a first step towards answering this question, this study compares bimanual coupling in simultaneous bimanual reversal movements that control cursor movements on a vertical screen. While both cursors were visible in the control condition, visual feedback was prevented in the(More)
— This paper investigates the strategies used during the human sit to stand movement. The analysis was carried out by means of the 3D videographic examination methods and a posturographic platform. The joint trajectories corresponding to the motion were reconstructed using the Humanoid Motion Analysis and Simulation (HuMAnS) toolbox developed at(More)
This paper deals with the dynamic control of humanoid robots interacting with their environment, and more specifically the behavioral synthesis of dynamic tasks. The purpose is to link several elementary activities subjected to physical constraints , both internal as torque limits and external as contacts, within the framework of posture/tasks coordination.(More)
This paper deals with robotic control through optimization tools, as Linear Quadratic Program (LQP). This method allows whole-body control, takes account contacts between the robot and the environment, and achieves tasks simultaneously. Each task can have a priority level, so hierarchy is possible. The method is applied on a virtual robot Icub, designed(More)
Long gamma-ray bursts (GRBs) are bright flashes of high-energy photons that can last for tens of minutes; they are generally associated with galaxies that have a high rate of star formation and probably arise from the collapsing cores of massive stars, which produce highly relativistic jets (collapsar model). Here we describe gamma- and X-ray observations(More)
In this experiment we test whether the effects of manual asymmetries on movement preparation depend on the parameter (amplitude or direction) to be programmed. In two experiments, only the amplitude, or the direction, of aiming movements was constrained. Reaction and movement times were measured. Results show that RTs are always shorter for left-hand than(More)