Generalization to Local Remappings of the Visuomotor Coordinate Transformation

By Zoubin Ghahramani, D. M. Wolpert, Michael I. Jordan. 1996

During visually guided movement, visual representations of target location must be transformed into coordinates appropriate for movement. To investigate the representation and plasticity of the visuomotor coordinate transformation, we examined the changes in pointing behavior after local visuomotor remappings. The visual feedback of finger position was limited to one or two locations in the workspace, at which a discrepancy was introduced between the actual and visually perceived finger position. These remappings induced changes in pointing, which were largest near the locus of remapping and decreased away from it. This pattern of spatial generalization highly constrains models of the computation of the visuomotor transformation in the CNS. A simple model, in which the transformation is computed via the population activity of a set of units with large sensory receptive fields, is shown to capture the observed pattern.

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Citations in the corpus

Reinforcement Learning with Augmented Data (2020, background): “On the other hand, biological agents have the remarkable ability to learn quickly [10, 11], while being able to generalize to a wide variety of unseen tasks [12].”
Learning of Visuomotor Transformations for Vectorial Planning of Reaching Trajectories (2000, background): “These computational models yield intermediate degrees of generalization and have been found to correspond reasonably well with experimental results (Imamizu et al., 1995; Ghahramani et al., 1996).”
Speech Production as State Feedback Control (2011, background): “By itself, evidence of feedback being compared with a prediction derived from efference copy implies the existence of predictive forward models within the CNS, but another line of evidence for forward models comes from sensorimotor adaptation experiments (Wolpert et al., 1995; Ghahramani et al., 199”
Evidence for a dynamic-dominance hypothesis of handedness (2001, background): “…adaptations to the rotated condition and have been demonstrated in a number of previous reports (Ghilardi et al. 1995; Imamizu et al. 1995; Ghahramani et al. 1996; Ghahramani and Wolpert 1997; Goodbody and Wolpert 1998; Ghilardi et al. 2000; Krakauer et al. 2000; Rosenbaum and Chaiken…”