Some binocular advantages for planning reach, but not grasp, components of prehension
| Autor: | Miriam L. Conway, Simon Grant |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Adult
Male Online control genetic structures Computer science Internal model Kinematics Motor Activity 050105 experimental psychology Young Adult Visuomotor behaviour 03 medical and health sciences 0302 clinical medicine Feedback Sensory Vision Monocular Humans Object type 0501 psychology and cognitive sciences Computer vision Stereopsis Depth Perception Vision Binocular business.industry General Neuroscience 05 social sciences GRASP Feed forward Visual feedback eye diseases Biomechanical Phenomena body regions Monocular vision RC0321 Female RE Artificial intelligence business Binocular vision Psychomotor Performance 030217 neurology & neurosurgery Research Article |
| Zdroj: | Experimental Brain Research |
| Popis: | Proficient (fast, accurate, precise) hand actions for reaching-to-grasp 3D objects are known to benefit significantly from the use of binocular vision compared to one eye alone. We examined whether these binocular advantages derive from increased reliability in encoding the goal object’s properties for feedforward planning of prehension movements or from enhanced feedback mediating their online control. Adult participants reached for, precision grasped and lifted cylindrical table-top objects (two sizes, 2 distances) using binocular vision or only their dominant/sighting eye or their non-dominant eye to program and fully execute their movements or using each of the three viewing conditions only to plan their reach-to-grasp during a 1 s preview, with vision occluded just before movement onset. Various kinematic measures of reaching and grasping proficiency, including corrective error rates, were quantified and compared by view, feedback and object type. Some significant benefits of binocular over monocular vision when they were just available for pre-movement planning were retained for the reach regardless of target distance, including higher peak velocities, straighter paths and shorter low velocity approach times, although these latter were contaminated by more velocity corrections and by poorer coordination with object contact. By contrast, virtually all binocular advantages for grasping, including improvements in peak grip aperture scaling, the accuracy and precision of digit placements at object contact and shorter grip application times preceding the lift, were eliminated with no feedback available, outcomes that were influenced by the object’s size. We argue that vergence cues can improve the reliability of binocular internal representations of object distance for the feedforward programming of hand transport, whereas the major benefits of binocular vision for enhancing grasping performance derive exclusively from its continuous presence online. |
| Databáze: | OpenAIRE |
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