Leftward oculomotor prismatic training induces a rightward bias in normal subjects

Ronga, Irene; Sarasso, Pietro; Raineri, F.; Duhamel, Jean‐René; Becchio, Cristina; Neppi-Mòdona, Marco

doi:10.1007/s00221-017-4934-3

Cited by 14 publications

(14 citation statements)

References 28 publications

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“…Conversely, stimuli interpreted as less precise are down-weighted, ensuring that only the more reliable sensory signals drive learning and behavior. Apparently, this mechanism of prediction error precision weighting is not only affected by individuals' previous experience (Ronga et al, 2017), but also follows some kind of universalistic trends, shared by most individuals. As an example, in the context of the multisensory integration necessary to guide motor behavior (such as grasping), as human beings we tend to rely more on visual input (considered as more precise) as compared to proprioceptive input (Van Beers et al, 2002).…”

Section: How To Build Precise Predictions? Evolutionary-based Vs Expmentioning

confidence: 99%

“Stopping for knowledge”: The sense of beauty in the perception-action cycle

Sarasso

Neppi-Mòdona

Sacco

et al. 2020

Neuroscience & Biobehavioral Reviews

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108

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Section: How To Build Precise Predictions? Evolutionary-based Vs Expmentioning

confidence: 99%

“Stopping for knowledge”: The sense of beauty in the perception-action cycle

Sarasso

Neppi-Mòdona

Sacco

et al. 2020

Neuroscience & Biobehavioral Reviews

Self Cite

108

View full text Add to dashboard Cite

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“…Fortis, Goedert, and Barrett (2011) used the same bisection-based exposure, and studied spatial judgements via an 'incompatible' bisection task with reversed visual feedback. Ronga et al (2017) used a novel oculomotor adaptation procedure, as well as the traditional pointing method, and a memory-based line bisection task, involving pointing with the eyes closed. (Guinet & Michel, 2013; Experiments 1 and 2, this paper).…”

Section: Description Of Datasetsmentioning

confidence: 99%

Meta-analysis of the visuospatial aftereffects of prism adaptation, with two novel experiments

McIntosh

Brown

Young

2019

Cortex

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“…Interestingly, Ronchi et al (2011) demonstrated that, in a population of healthy subjects, the simple observation in a first person perspective of repeated pointing errors mimicking those executed during PA induced similar effects to those triggered by classical visuomotor PA, thus indicating that actual execution of pointing movements is not necessary to induce adaptive processes, being sufficient the observation of these same movements. Furthermore, in two recent studies on healthy subjects and neglect patients (Ronga et al, 2017a,b), we showed that an oculomotor PT, only consisting in gaze shifts toward visual targets while wearing prismatic goggles, produces similar, although weaker, after-effects in line bisection to those produced by PA induced through pointing movements (i.e., visuomotor PT).…”

Section: Introductionmentioning

confidence: 57%

“…Our predictions were that both 1st PT and 3rd PT would have ameliorated spatial neglect of patients E- in a similar way, due to the effectiveness of ocular movements alone in inducing PA (Ronga et al, 2017a,b). Conversely, in Patient 1 (E+), we expected that 1st PT was more effective than 3rd PT in ameliorating neglect symptoms due to the occurrence -in 1st PT only- of the delusional movements of the embodied ‘alien’ arm.…”

Section: Methodsmentioning

confidence: 80%

‘See Me, Feel Me’: Prismatic Adaptation of an Alien Limb Ameliorates Spatial Neglect in a Patient Affected by Pathological Embodiment

et al. 2019

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Pathological embodiment (E+) is a specific contralesional delusion of body ownership, observed following brain damage, in which patients embody someone else’s arm and its movements within their own body schema whenever the contralesional ‘alien’ arm is presented in a body-congruent position (i.e., 1st person perspective and aligned with the patient’s shoulder). This disorder is often associated with spatial neglect, a neurological syndrome in which patients are unaware of stimuli presented in the contralesional (often the left) space. Capitalizing on previous evidence demonstrating that prismatic adaptation of the ipsilesional arm to right-deviating prisms is effective in ameliorating neglect symptoms, here we investigated whether such amelioration also occurs in E+ patients with neglect when prismatic training is performed by the ‘alien’ embodied arm. Four left neglect patients (one with and three without pathological embodiment) underwent visuomotor prismatic training performed by an ‘alien’ arm. Specifically, while patients were wearing prismatic goggles shifting the visual field rightward, a co-experimenter’s left arm presented in a body-congruent perspective was repeatedly moved toward visual targets by another examiner. In a control condition, the co-experimenter’s arm was moved toward the targets from a body-incongruent position (i.e., 3rd person perspective). Neglect symptoms were assessed before and after training through paper-and-pencil tasks. In the E+ patient, neglect improved significantly more in 1st than in 3rd person perspective training, suggesting that prismatic adaptation of the ‘alien’ embodied arm is effective in modulating spatial representation. Conversely, for control E- patients (not embodying the ‘alien’ arm), we observed more limited improvements following training. These findings indicate that the ‘alien’ embodied arm is so deeply embedded in the patient body and motor schema that adaptation to prismatic lenses can affect multiple processing stages, from low level sensory-motor correspondences, to higher level body, motor and spatial maps, similarly as it occurs in normal subjects and neglect patients without pathological embodiment.

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Leftward oculomotor prismatic training induces a rightward bias in normal subjects

Cited by 14 publications

References 28 publications

“Stopping for knowledge”: The sense of beauty in the perception-action cycle

“Stopping for knowledge”: The sense of beauty in the perception-action cycle

Meta-analysis of the visuospatial aftereffects of prism adaptation, with two novel experiments

‘See Me, Feel Me’: Prismatic Adaptation of an Alien Limb Ameliorates Spatial Neglect in a Patient Affected by Pathological Embodiment

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