Do supine position and deprivation of visual environment influence spatial neglect?

Gassama, Sahawanatou; Deplancke, A.; Saj̈, Arnaud; Honoré, Jacques; Rousseaux, M.

doi:10.1007/s00415-011-5926-z

Cited by 8 publications

(8 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The two experiments showed that participants made generally more bisection errors when they could see their hands and the workspace as compared to the conditions where they only saw the stimuli and the cursor. This finding falls into line with the observation that reducing surrounding visual information can improve visuo-spatial performance in spatial neglect (Chokron, Colliot, & Bartolomeo, 2004;Gassama, Deplancke, Saj, Honore, & Rousseaux, 2011;Hjaltason & Tegner, 1992). This could be due to the fact that attention is less captured by visual distractors.…”

Section: Discussionsupporting

confidence: 88%

Robot-assisted line bisection test in virtual reality

Filbrich¹,

Xivry²,

Verfaille³

et al. 2018

Preprint

View full text Add to dashboard Cite

There is growing evidence in the literature suggesting that sensori-motor deficits have a detrimental impact on cognitive abilities, such as the perception and representation of space. Most of the tasks classically used to assess spatial perception abilities after brain damage seem however not adequate to reveal potentially more discrete impairments in patients that are predominantly suffering from sensori-motor symptoms. To this aim we adapted the classic line bisection task in a virtual reality environment for the use with patients with upper-limb sensory-motor deficits. Here, we report the results from two pre-clinical experiments with healthy volunteers. Lines were projected horizontally on a semi-reflective mirror. Participants were asked to bisect the lines at their estimated midpoint by means of a robotic handle. Manipulated factors were the static hand, the position of the static hand (inside or outside of workspace), the visibility of the hands and the location of the lines. Results showed that participants neglected the most lateral part of the lines when they were projected distantly from the starting point. Bisection biases were in general more important when participants could see their hands. Additionally, participants took more time to initiate movements when they had to cover a short distance to reach the lines. We conclude that our robotic adaptation of the line bisection task was able to highlight subtle perceptual asymmetries in healthy individuals and that its use to reveal discrete cognitive deficits in patients with sensory-motor impairments seems therefore promising.

show abstract

Section: Discussionsupporting

confidence: 88%

Robot-assisted line bisection test in virtual reality

Filbrich¹,

Xivry²,

Verfaille³

et al. 2018

Preprint

View full text Add to dashboard Cite

show abstract

“…This was done in order to quantify patients' baseline as well as short- and long-term changes in visuospatial biases. Neglect severity was measured with the Schenkenberg line bisection task [36] (18 horizontal lines, 10–20 cm) and a variant of the bell cancellation test [37] (with 35 animal targets (among distractor objects)) [38]. Four equivalent animal search displays were used, each divided into seven virtual columns (each containing 5 targets).…”

Section: Methodsmentioning

confidence: 99%

Increased Alpha-Rhythm Dynamic Range Promotes Recovery from Visuospatial Neglect: A Neurofeedback Study

Ros¹,

Michela²,

Bellman

et al. 2017

Neural Plasticity

Self Cite

View full text Add to dashboard Cite

Despite recent attempts to use electroencephalogram (EEG) neurofeedback (NFB) as a tool for rehabilitation of motor stroke, its potential for improving neurological impairments of attention—such as visuospatial neglect—remains underexplored. It is also unclear to what extent changes in cortical oscillations contribute to the pathophysiology of neglect, or its recovery. Utilizing EEG-NFB, we sought to causally manipulate alpha oscillations in 5 right-hemisphere stroke patients in order to explore their role in visuospatial neglect. Patients trained to reduce alpha oscillations from their right posterior parietal cortex (rPPC) for 20 minutes daily, over 6 days. Patients demonstrated successful NFB learning between training sessions, denoted by improved regulation of alpha oscillations from rPPC. We observed a significant negative correlation between visuospatial search deficits (i.e., cancellation test) and reestablishment of spontaneous alpha-rhythm dynamic range (i.e., its amplitude variability). Our findings support the use of NFB as a tool for investigating neuroplastic recovery after stroke and suggest reinstatement of intact parietal alpha oscillations as a promising target for reversing attentional deficits. Specifically, we demonstrate for the first time the feasibility of EEG-NFB in neglect patients and provide evidence that targeting alpha amplitude variability might constitute a valuable marker for clinical symptoms and self-regulation.

show abstract

“…Since the majority of studies did not report spatial biases separately for male and female participants, we also calculated the percentage of male participants in each study where this data was available. Nineteen studies did not report the sex of their participants and the data from the following studies were therefore not included in this analysis: (Andrews et al 2017;Barton et al 1998;Binetti et al 2011;Corazzini et al 2005;Daini et al 2008;Doricchi et al 2002;Gassama et al 2011;Grossi et al 1999;Hatin et al 2012;Luauté et al 2012;Mennemeier et al 1997Mennemeier et al , 2001Plummer et al 2006;Richard et al 2004;Striemer and Danckert 2010;Vallar et al 2000;Veronelli et al 2014b;Williamson et al 2018;Zeller and Hullin 2018).…”

Section: Moderatorsmentioning

confidence: 99%

A meta-analysis of line bisection and landmark task performance in older adults

Learmonth¹,

Παπαδάτου-Παστού²

2021

Preprint

View full text Add to dashboard Cite

Young adults exhibit a small asymmetry of visuospatial attention that favours the left side of space relative to the right (pseudoneglect). However, it remains unclear whether this leftward bias is maintained, eliminated or shifted rightward in older age. Here we present two meta-analyses that aimed to identify whether adults aged ≥50 years old display a group-level spatial attention bias, as indexed by the line bisection and the landmark tasks. A total of 69 datasets from 65 studies, involving 1654 participants, were analysed. In the meta-analysis of the line bisection task (n = 63), no bias was identified for studies where the mean age was ≥50, but there was a clear leftward bias in a subset where all individual participants were aged ≥50. There was no moderating effect of the participant’s age or sex, line length, line position, nor the presence of left or right cues. There was a small publication bias in favour of reporting rightward biases. Of note, biases were slightly more leftward in studies where participants had been recruited as part of a stand-alone older group, compared to studies where participants were recruited as controls for a clinical study. Similarly, no spatial bias was observed in the meta-analysis of the landmark task, although the number of studies included was small (n = 6). Overall, these results indicate that over 50s maintain a group-level leftward bias on the line bisection task, but more studies are needed to determine whether this bias can be modulated by stimulus- and/or state-dependent factors.

show abstract

Do supine position and deprivation of visual environment influence spatial neglect?

Cited by 8 publications

References 23 publications

Robot-assisted line bisection test in virtual reality

Robot-assisted line bisection test in virtual reality

Increased Alpha-Rhythm Dynamic Range Promotes Recovery from Visuospatial Neglect: A Neurofeedback Study

A meta-analysis of line bisection and landmark task performance in older adults

Contact Info

Product

Resources

About