Multisensory Integration during Motor Planning

Sober, Samuel J.; Sabes, Philip N.

doi:10.1523/jneurosci.23-18-06982.2003

Cited by 356 publications

(342 citation statements)

References 44 publications

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“…A difference in reach acceleration under different sensory inputs could be related to increased uncertainty leading to less confident movement, characterised with less THE RUBBER HAND ILLUSION IN AUTISM SPECTRUM DISORDERS acceleration (Jeannerod, 1986;Rossetti et al, 1995;Kording & Wolpert, 2004;Sober & Sabes, 2003). Uncertainty can have multiple sources: uncertainty in prior assumptions, mismatch with expectations leading to prediction errors as movement unfolds, and lack of precision of sensory estimates (Bays & Wolpert, 2007).…”

Section: The Rubber Hand Illusion In Autism Spectrum Disorders 18mentioning

confidence: 99%

The Rubber Hand Illusion Reveals Proprioceptive and Sensorimotor Differences in Autism Spectrum Disorders

Paton

Hohwy

Enticott

2011

J Autism Dev Disord

123

101

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Autism spectrum disorder (ASD) is characterised by differences in unimodal and multimodal sensory and proprioceptive processing, with complex biases towards local over global processing. Many of these elements are implicated in versions of the rubber hand illusion (RHI), which were therefore studied in high-functioning individuals with ASD and a typically developing control group. Both groups experienced the illusion. A number of differences were found, related to proprioception and sensorimotor processes. The ASD group showed reduced sensitivity to visuotactile-proprioceptive discrepancy but more accurate proprioception. This group also differed on acceleration in subsequent reach trials. Results are discussed in terms of weak top-down integration and precision-accuracy trade-offs. The RHI appears to be a useful tool for investigating multisensory processing in ASD.Keywords: High-functioning autism spectrum disorder, rubber hand illusion, multimodal sensory integration, local processing bias Correspondence concerning this article should be addressed to Jakob Hohwy, Philosophy Department, Monash University, Building 11, Room w913, Clayton, VIC, 3800, Australia. E-mail: Jakob.Hohwy@monash.edu Running head: THE RUBBER HAND ILLUSION IN AUTISM SPECTRUM DISORDERS AbstractAutism spectrum disorder (ASD) is characterised by differences in unimodal and multimodal sensory

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Section: The Rubber Hand Illusion In Autism Spectrum Disorders 18mentioning

confidence: 99%

The Rubber Hand Illusion Reveals Proprioceptive and Sensorimotor Differences in Autism Spectrum Disorders

Paton

Hohwy

Enticott

2011

J Autism Dev Disord

123

101

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“…However, Sober and Sabes(2003) found that the relative contributions of vision and proprioception are not fixed but variable depending on the computation being performed. Furthermore, even for the same computation, the brain weights differently depending on the context such as the content of the visual information or the sensory modality for the target location, suggesting that the brain tries to minimize errors arising from transformation between coordinates (Sober and Sabes, 2005).…”

Section: Relative Contributions Of Vision and Proprioceptionmentioning

confidence: 99%

“…However, a recent study challenged this view. Sober and Sabes (2003) considered a reaching task where state of the limb could be estimated using both vision and proprioception. They described two important psychophysical results: First, the estimate of limb state used for kinematic planning of a reach relied mostly on a representation of limb state in terms of vision.…”

mentioning

confidence: 99%

Dissociable effects of the implicit and explicit memory systems on learning control of reaching

2006

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Adaptive control of reaching depends on internal models that associate states in which the limb experienced a force perturbation with motor commands that can compensate for it. Limb state can be sensed via both vision and proprioception. However, adaptation of reaching in novel dynamics results in generalization in the intrinsic coordinates of the limb, suggesting that the proprioceptive states in which the limb was perturbed dominate representation of limb state. To test this hypothesis, we considered a task where position of the hand during a reach was correlated with patterns of force perturbation. This correlation could be sensed via vision, proprioception, or both. As predicted, when the correlations could be sensed only via proprioception, learning was significantly better as compared to when the correlations could only be sensed through vision. We found that learning with visual correlations resulted in subjects who could verbally describe the patterns of perturbations but this awareness was never observed in subjects who learned the task with only proprioceptive correlations. We manipulated the relative values of the visual and proprioceptive parameters and found that the probability of becoming aware strongly depended on the correlations that subjects could visually observe. In all conditions, aware subjects demonstrated a small but significant advantage in their ability to adapt their motor commands. Proprioceptive correlations produced an internal model that strongly influenced reaching performance yet did not lead to awareness. Visual correlations strongly increased the probability of becoming aware, yet had a much smaller but still significant effect on reaching performance. Therefore, practice resulted in acquisition of both implicit and explicit internal models.

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“…First, the design of those and many other experiments (Flanagan and Rao, 1995;Lateiner and Sainburg, 2003;Sober and Sabes, 2003) relied on conflict between visual and kinesthetic feedback about the hand. Because both information types were available simultaneously (to create conflict), a direct visual-visual or kinesthetic-kinesthetic target-hand comparison was always possible.…”

Section: Introductionmentioning

confidence: 99%

Necessity is the Mother of Invention: Reconstructing Missing Sensory Information in Multiple, Concurrent Reference Frames for Eye–Hand Coordination

Tagliabue¹,

McIntyre²

2011

J. Neurosci.

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When aligning the hand to grasp an object, the CNS combines multiple sensory inputs encoded in multiple reference frames. Previous studies suggest that when a direct comparison of target and hand is possible via a single sensory modality, the CNS avoids performing unnecessary coordinate transformations that add noise. But when target and hand do not share a common sensory modality (e.g., aligning the unseen hand to a visual target), at least one coordinate transformation is required. Similarly, body movements may occur between target acquisition and manual response, requiring that egocentric target information be updated or transformed to external reference frames to compensate. Here, we asked subjects to align the hand to an external target, where the target could be presented visually or kinesthetically and feedback about the hand was visual, kinesthetic, or both. We used a novel technique of imposing conflict between external visual and gravito-kinesthetic reference frames when subjects tilted the head during an instructed memory delay. By comparing experimental results to analytical models based on principles of maximum likelihood, we showed that multiple transformations above the strict minimum may be performed, but only if the task precludes a unimodal comparison of egocentric target and hand information. Thus, for cross-modal tasks, or when head movements are involved, the CNS creates and uses both kinesthetic and visual representations. We conclude that the necessity of producing at least one coordinate transformation activates multiple, concurrent internal representations, the functionality of which depends on the alignment of the head with respect to gravity.

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Multisensory Integration during Motor Planning

Cited by 356 publications

References 44 publications

The Rubber Hand Illusion Reveals Proprioceptive and Sensorimotor Differences in Autism Spectrum Disorders

The Rubber Hand Illusion Reveals Proprioceptive and Sensorimotor Differences in Autism Spectrum Disorders

Dissociable effects of the implicit and explicit memory systems on learning control of reaching

Necessity is the Mother of Invention: Reconstructing Missing Sensory Information in Multiple, Concurrent Reference Frames for Eye–Hand Coordination

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