Dépendance visuelle après accident vasculaire cérébral récent

Derighetti, F.; Gellez-Leman, M C; Bradaï, N.; Yelnik, A.

doi:10.1016/j.annrmp.2006.01.010

Cited by 14 publications

(3 citation statements)

References 23 publications

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“…They had relevant absolute directional error, but most of them did not cancel these errors in a predictive way as the training proceeded, they just corrected the second part of the cursor trajectory by using visual feedback. This finding is supported by the hypothesis that many subjects with hemiplegia have an excessive reliance on visual feedback [ 54 ] and this is observable since the acute stage [ 58 , 59 ]. Thus, a training based only on continuous visual feedback may decrease in a significant manner the role of proprioceptive, tactile and vestibular feedback in the control of posture [ 60 – 62 ] even when these sensory modalities remain intact after the stroke.…”

Section: Discussionmentioning

confidence: 62%

Effects of continuous visual feedback during sitting balance training in chronic stroke survivors

Pellegrino

Giannoni

Marinelli

et al. 2017

J NeuroEngineering Rehabil

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BackgroundPostural control deficits are common in stroke survivors and often the rehabilitation programs include balance training based on visual feedback to improve the control of body position or of the voluntary shift of body weight in space. In the present work, a group of chronic stroke survivors, while sitting on a force plate, exercised the ability to control their Center of Pressure with a training based on continuous visual feedback. The goal of this study was to test if and to what extent chronic stroke survivors were able to learn the task and transfer the learned ability to a condition without visual feedback and to directions and displacement amplitudes different from those experienced during training.MethodsEleven chronic stroke survivors (5 Male - 6 Female, age: 59.72 ± 12.84 years) participated in this study. Subjects were seated on a stool positioned on top of a custom-built force platform. Their Center of Pressure positions were mapped to the coordinate of a cursor on a computer monitor. During training, the cursor position was always displayed and the subjects were to reach targets by shifting their Center of Pressure by moving their trunk. Pre and post-training subjects were required to reach without visual feedback of the cursor the training targets as well as other targets positioned in different directions and displacement amplitudes.ResultsDuring training, most stroke survivors were able to perform the required task and to improve their performance in terms of duration, smoothness, and movement extent, although not in terms of movement direction. However, when we removed the visual feedback, most of them had no improvement with respect to their pre-training performance.ConclusionsThis study suggests that postural training based exclusively on continuous visual feedback can provide limited benefits for stroke survivors, if administered alone. However, the positive gains observed during training justify the integration of this technology-based protocol in a well-structured and personalized physiotherapy training, where the combination of the two approaches may lead to functional recovery.

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Section: Discussionmentioning

confidence: 62%

Effects of continuous visual feedback during sitting balance training in chronic stroke survivors

Pellegrino

Giannoni

Marinelli

et al. 2017

J NeuroEngineering Rehabil

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“…The vertical line was presented 24 times straight (0°) and 36 times tilted by −30°, −25°, −20°, −15°, −10°, −5°, 5°, 10°, 15°, 20°, 25°, or 30° (3 times each). A circle and an irregular frame were also presented on the screen so as to avoid systematic strategies and frame effects (14).…”

Section: Methodsmentioning

confidence: 99%

Functional Neuroanatomy of Vertical Visual Perception in Humans

2019

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Vertical representation is central to posture control, as well as to spatial perception and navigation. This representation has been studied for a long time in patients with vestibular disorders and more recently in patients with hemispheric damage, in particular in those with right lesions causing spatial or postural deficits. The aim of the study was to determine the brain areas involved in the visual perception of the vertical. Sixteen right-handed healthy participants were evaluated using fMRI while they were judging the verticality of lines or, in a control task, the color of the same lines. The brain bases of the vertical perception proved to involve a bilateral temporo-occipital and parieto-occipital cortical network, with a right dominance tendency, associated with cerebellar and brainstem areas. Consistent with the outcomes of neuroanatomical studies in stroke patients, The data of this original fMRI study in healthy subjects provides new insights into brain networks associated with vertical perception which is typically impaired in both vestibular and spatial neglect patients. Interestingly, these networks include not only brain areas associated with postural control but also areas implied in body representation.

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“…Stroke patients are highly visually dependent (Corriveau et al 2004 ; Bonan et al 2004 , 2006 , 2013 , 2015 ; Yelnik et al 2006 ; Tasseel-Ponche et al 2017 ). This visual dependence is also accompanied by an increased sensitivity to proprioceptive and vestibular information (Marsden et al 2005 ).…”

Section: The Sensory Sidementioning

confidence: 99%

Perceptual-motor styles

Vidal

Lacquaniti

2021

Exp Brain Res

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Even for a stereotyped task, sensorimotor behavior is generally variable due to noise, redundancy, adaptability, learning or plasticity. The sources and significance of different kinds of behavioral variability have attracted considerable attention in recent years. However, the idea that part of this variability depends on unique individual strategies has been explored to a lesser extent. In particular, the notion of style recurs infrequently in the literature on sensorimotor behavior. In general use, style refers to a distinctive manner or custom of behaving oneself or of doing something, especially one that is typical of a person, group of people, place, context, or period. The application of the term to the domain of perceptual and motor phenomenology opens new perspectives on the nature of behavioral variability, perspectives that are complementary to those typically considered in the studies of sensorimotor variability. In particular, the concept of style may help toward the development of personalised physiology and medicine by providing markers of individual behaviour and response to different stimuli or treatments. Here, we cover some potential applications of the concept of perceptual-motor style to different areas of neuroscience, both in the healthy and the diseased. We prefer to be as general as possible in the types of applications we consider, even at the expense of running the risk of encompassing loosely related studies, given the relative novelty of the introduction of the term perceptual-motor style in neurosciences.

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Dépendance visuelle après accident vasculaire cérébral récent

Cited by 14 publications

References 23 publications

Effects of continuous visual feedback during sitting balance training in chronic stroke survivors

Effects of continuous visual feedback during sitting balance training in chronic stroke survivors

Functional Neuroanatomy of Vertical Visual Perception in Humans

Perceptual-motor styles

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