Brain damaged adults with either hemiparesis and/or hemineglect. Brain damaged children with developmental and/or acquired disease inducing hemiparesis and/or hemineglect.

Healthy adults and children.

Cognitive and motor testing and/or experimental cognitive or motor changes and/or cognitive or motor rehabilitation depending on part of the study investigated.

Kinematics will be measured with a robotic tool called the REAplan. This tool is a distal effector robotic device that enables the patients to perform upper limb movements in a horizontal plane. The robot comprises a distal effector, a visual interface for the patient and a visual interface for the experimenter. It is fitted with incremental position sensors allowing the record of the distal effector's trajectory in the X and Y plane as function of time (125 Hz). From these records, all kind of quantitative and objective indices of upper limb quality of movement can be computed. Motor and cognitive tasks have been created on this device and have to be validated. These new tools on the robot provide a more accurate measure to better understand the participant's motor and cognitive functioning through kinematics analyses. Moreover, the robot can be used as a rehabilitative device, providing cognitive and motor assistance for specific exercises depending on participant performance.

Cognition and motor performance will be also measured with standardized paper and pencil tests, scales and questionnaires using the three dimensions of the International Classification of Functioning (Body structure and function / Activity limitation / Participation restriction).