%0 Journal Article %T What is the Nature of the Reach-and-Grasp Deficit in Glaucoma? %+ Laboratoire Sciences Cognitives et Sciences Affectives - UMR 9193 (SCALab) %A Corveleyn, Xavier %A Lenoble, Quentin %A Rouland, Jean-François %A Boucart, Muriel %< avec comité de lecture %@ 1057-0829 %J Journal of Glaucoma %I Lippincott, Williams & Wilkins %8 2020 %D 2020 %Z Life Sciences [q-bio]Journal articles %X Purpose: Vision plays an important role in planning and executing manual prehension (reaching and grasping). We assess the impact of glaucoma on motor production, as a function of the visual exploration time available to the patients. Methods: We compared performance in two reach and grasp tasks determined by whether or not the participants (16 glaucoma patients, 14 age-matched and 18 young controls) had time to explore the objects before reaching and grasping a target object defined by its color.Results: Differences were observed between glaucoma patients and age-matched controls on movement duration and peak velocity (reaching phase) only when participants were not provided time to look at the objects before the movement (immediate condition).Conclusions: Glaucoma patients exhibited a motor disorder (grasping phase) only when they had no time to explore their environment before performing the reach-and-grasp task. The motor abnormalities in reaching phase observed in glaucoma patient in previous studies seem to result from difficulties in target identification rather than from visuo-motor deficits. From a clinical point of view, motor performances of glaucoma patients could be modulated by task, especially by temporal constraints of task. %G English %2 https://cnrs.hal.science/hal-03018698/document %2 https://cnrs.hal.science/hal-03018698/file/Reach%20and%20Grasp%20in%20Glaucoma_2020.pdf %L hal-03018698 %U https://cnrs.hal.science/hal-03018698 %~ CNRS %~ SCALAB %~ UNIV-LILLE %~ TEST-HALCNRS