Motor transfer from map ocular exploration to locomotion during spatial navigation from memory

Demichelis, A M; Olivier, Gérard; Berthoz, Alain

doi:10.1007/s00221-012-3336-9

Cited by 11 publications

(8 citation statements)

References 33 publications

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“…A novel test for locomotor navigation, suitable for both children and adults, has been developed for the study of spatial orientation, visual–spatial memory, and cognitive strategies during navigation: the Magic Carpet (MC) ( Meilinger et al, 2011 ; Demichelis et al, 2013 ; Belmonti et al, 2014 ; Perrochon et al, 2014 ). The MC was derived from the previous Walking–Corsi test ( Piccardi et al, 2008 ), and both are transpositions of the traditional Corsi Block-tapping Task (CBT) to locomotor space.…”

Section: Introductionmentioning

confidence: 99%

Navigation strategies as revealed by error patterns on the Magic Carpet test in children with cerebral palsy

et al. 2015

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Introduction: Short-term memory develops differently in navigation vs. manual space. The Magic Carpet (MC) is a novel navigation test derived from the Walking Corsi Test and the manual Corsi Block-tapping Task (CBT). The MC requires mental rotations and executive function. In Cerebral Palsy (CP), CBT, and MC scores relate differently to clinical and lesional factors. Hypotheses of this study are: that frontal lesion specifically affect navigation in CP; that brain lesions affect MC cognitive strategies.Materials and Methods: Twenty-two children with spastic CP, aged 5 to 14 years, 14 with a unilateral and 8 with a bilateral form, underwent the CBT and the MC. Errors were classified into seven patterns by a recently described algorithm. Brain lesions were quantified according to a novel semi-quantitative MRI scale. Control data were partially drawn from a previous study on 91 typically developing children.Results: Children with CP performed worse than controls on both tests. Right hemispheric impairment correlated with spatial memory. MC span was reduced less than CBT span and was more selectively related to right middle white-matter and frontal lesions. Error patterns were differently distributed in CP and in typical development, and depended on right brain impairment: children with more extensive right lesions made more positional than sequential errors.Discussion: In CP, navigation is affected especially by extensive lesions involving the right frontal lobe. In addition, these are associated with abnormal cognitive strategies. Whereas in typical development positional errors, preserving serial order, increase with age and performance, in CP they are associated with poorer performance and more extensive right-brain lesions. The explanation may lie in lesion side: right brain is crucial for mental rotations, necessary for spatial updating. Left-lateralized spatial memory strategies, relying on serial order, are not efficient if not accompanied by right-brain spatial functions.

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Section: Introductionmentioning

confidence: 99%

Navigation strategies as revealed by error patterns on the Magic Carpet test in children with cerebral palsy

et al. 2015

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“…Moreover, the effect was amplified when the participants were right-handed. Demichelis et al (2013) investigated whether, when attempting to restore walking a path learned on a map from our memory, we remember it by simulating the ocular exploration that we originally used to learn it. In one hand the results showed that horizontal movements being more efficient than vertical ones, in other hand, they suggest that the participants had mentally repeated their previous ocular exploration of the map, and that it is this oculomotor memory that was used to perform the locomotor memory task.…”

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confidence: 99%

Enactive Memory

Brouillet

2020

Front. Psychol.

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“…We have shown that gaze (as evidenced by eye and head direction in space) anticipates the trajectory and that the control of walking is a top‐down mechanism in which gaze control is essential. The importance of gaze in the planning of walking trajectories has also been shown in the ‘magic carpet’ paradigm (see below) . To study the anticipation of the locomotor trajectory by gaze and the problem of spatial reference frames in these children, we have designed a paradigm (Fig.…”

Section: The ‘Locomotor Trajectory’ Paradigmmentioning

confidence: 99%

“…The importance of gaze in the planning of walking trajectories has also been shown in the 'magic carpet' paradigm (see below). 5 To study the anticipation of the locomotor trajectory by gaze and the problem of spatial reference frames in these children, we have designed a paradigm ( Fig. 2) in which the child has to reach, by walking in a room, one of three visual targets from an initial departure point.…”

Section: The 'Locomotor Trajectory' Paradigmmentioning

confidence: 99%

New paradigms and tests for evaluating and remediating visuospatial deficits in children

Berthoz

Zaoui

2015

Develop Med Child Neuro

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This review suggests several hypotheses about the cognitive developmental mechanisms involved in the motor deficits of children with cerebral palsy. We suggest a new theory that visuospatial deficits involving the manipulation of multiple spatial reference frames are crucial components of the disorder in spatial orientation, manipulation, locomotion, navigation, and even social interactions. We review basic knowledge about the brain networks involved in spatial memory and cognition. We then present several potential paradigms for studying specific deficits. We consider first the use of vestibular signals for egocentric spatial orientation in children and the 'locomotor trajectory paradigm' for studying gaze anticipation and perceptual components of walking. We then describe new paradigms for studying egocentric and allocentric strategies in spatial tasks: the 'virtual path length', the 'virtual palace' and the 'virtual star maze'. We also consider paradigms involving the use of other persons and perspective change from a first person's to a third person's viewpoint as reference in spatial tasks or social interactions: the 'designation' paradigm, the 'harlequin', and the 'tightrope walker'. Finally, we briefly present a new experimental set up involving a 'virtual carpet', which follows previous studies of cognitive strategies for generating locomotor trajectories using the 'magic carpet' and which will allow a large variety of studies involving executive functions and inhibition of the first-appearing strategies during development. Several of these new paradigms could be used for remediation.Children with cerebral palsy (CP) suffer from several 'motor' or 'sensory-motor' deficits in tasks involving spatial cognition.1 These deficits can be observed either in spatial orientation, in manipulation, or in locomotion. Most of the available neuropsychological tests about this problem are table tests, or even simple paper tests. However, what is required are tests exploring the competences of these patients in more ecological situations and in relation to the cognitive brain functions involved for visuospatial tasks in proximal but also in remote environments, requiring navigation, locomotion, and use of multiple scales of space from the nearest to the environment.In this review we shall first state some general hypotheses proposed by one of us (AB) about the cognitive visuospatial and spatial memory deficits that may be involved in the observed 'motor' deficits of children with CP. We shall then review a few potential new paradigms for studying these deficits, and potentially their remediation, and briefly describe a new version of the 'magic carpet' as proposed by one of us (MZ). The purpose of this paper is therefore not to give a report of each study, whose details can be found in the cited papers, but to provide a conceptual and practical framework of the understanding of these deficits from childhood to adulthood and potentially in elderly patients. The work is essentially based on that done by our laboratory or ...

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Motor transfer from map ocular exploration to locomotion during spatial navigation from memory

Cited by 11 publications

References 33 publications

Navigation strategies as revealed by error patterns on the Magic Carpet test in children with cerebral palsy

Navigation strategies as revealed by error patterns on the Magic Carpet test in children with cerebral palsy

Enactive Memory

New paradigms and tests for evaluating and remediating visuospatial deficits in children

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