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- W2099650267 startingPage "10" @default.
- W2099650267 abstract "Eye–hand coordination is complex because it involves the visual guidance of both the eyes and hands, while simultaneously using eye movements to optimize vision. Since only hand motion directly affects the external world, eye movements are the slave in this system. This eye– hand visuomotor system incorporates closed-loop visual feedback but here we focus on early feedforward mechanisms that allow primates to make spatially accurate reaches. First, we consider how the parietal cortex might store and update gaze-centered representations of reach targets during a sequence of gaze shifts and fixations. Recent evidence suggests that such representations might be compared with hand position signals within this early gaze-centered frame. However, the resulting motor error commands cannot be treated independently of their frame of origin or the frame of their destined motor command. Behavioral experiments show that the brain deals with the nonlinear aspects of such reference frame transformations, and incorporates internal models of the complex linkage geometry of the eye–head–shoulder system. These transformations are modeled as a series of vector displacement commands, rotated by eye and head orientation, and implemented between parietal and frontal cortex through efficient parallel neuronal architectures. Finally, we consider how this reach system might interact with the visually guided grasp system through both parallel and coordinated neural algorithms." @default.
- W2099650267 created "2016-06-24" @default.
- W2099650267 creator A5009732432 @default.
- W2099650267 creator A5035681062 @default.
- W2099650267 creator A5044243996 @default.
- W2099650267 date "2004-07-01" @default.
- W2099650267 modified "2023-09-27" @default.
- W2099650267 title "Spatial Transformations for Eye–Hand Coordination" @default.
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