Binocular advantage for prehension movements performed in visually enriched environments requiring visual search.

摘要: The purpose of this study was to examine the role binocular vision during a prehension task performed in visually enriched environment where target object surrounded by distractors/obstacles. Fifteen adults reached and grasped for cylindrical peg while eye movements upper limb kinematics were recorded. complexity visual manipulated varying number distractors saliency target. Gaze behavior (i.e., latency primary gaze shift frequency shifts prior reach initiation) comparable between viewing conditions. In contrast, advantage evident performance accuracy. Specifically, participants picked up wrong twice as often monocular when increased. Reach more efficient viewing, which demonstrated shorter reaction time overall movement time. Reaching approach phase had higher peak velocity viewing. During trajectories exhibited direction bias acceleration phase, leftward left rightward right This can be explained presence esophoria covered eye. grasping interval also extended ~20% viewing; however, duration return after across conclusion, provides important input planning execution environments. Binocular evident, regardless set size or saliency, indicating that plan their cautiously even relatively simple environments with highly salient Nevertheless, visually-normal sufficient information engage online control correct initial errors planning.