Viewing geometry determines the contribution of binocular vision to the online control of grasping.

ABSTRACT: Binocular vision is often assumed to make a specific, critical contribution to online visual control of grasping by providing precise information about the separation between digits and object. This account overlooks the 'viewing geometry' typically encountered in grasping, however. Separation of hand and object is rarely aligned precisely with the line of sight (the visual depth dimension), and analysis of the raw signals suggests that, for most other viewing angles, binocular feedback is less precise than monocular feedback. Thus, online grasp control relying selectively on binocular feedback would not be robust to natural changes in viewing geometry. Alternatively, sensory integration theory suggests that different signals contribute according to their relative precision, in which case

SUBMITTER: Keefe BD 

PROVIDER: S-EPMC5671520 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature