Biased Visuospatial Attention in Cervical Dystonia

2017 ◽  
Vol 24 (1) ◽  
pp. 22-32 ◽  
Author(s):  
Gaetana Chillemi ◽  
Caterina Formica ◽  
Adriana Salatino ◽  
Alessandro Calamuneri ◽  
Paolo Girlanda ◽  
...  
Keyword(s):  
Cervical Dystonia ◽  
Ocular Dominance ◽  
Visuospatial Attention ◽  
Bisection Task ◽  
Left Hand ◽  
Pattern Type ◽  
Gender Education ◽  
Visuospatial Processing ◽  
True Center ◽  
Line Bisection Task

AbstractObjectives: There is increasing evidence of non-motor, sensory symptoms, mainly involving the spatial domain, in cervical dystonia (CD). These manifestations are likely driven by dysfunctional overactivity of the parietal cortex during the execution of a sensory task. Few studies also suggest the possibility that visuospatial attention might be specifically affected in patients with CD. Therefore, we asked whether non-motor manifestations in CD might also comprise impairment of higher level visuospatial processing. Methods: To this end, we investigated visuospatial attention in 23 CD patients and 12 matched healthy controls (for age, gender, education, and ocular dominance). The patients were identified according to the dystonia pattern type (laterocollis vs. torticollis). Overall, participants were right-handers, and the majority of them was right-eye dominant. Visuospatial attention was assessed using a line bisection task. Participants were asked to bisect horizontal lines, using their right or left hand. Results: Participants bisected more to the left of true center when using their left hand to perform the task than when using their right hand. However, overall, torticollis patients produced a significantly greater leftward deviation than controls. Conclusions: These data are consistent with preliminary findings suggesting the presence of biased spatial attention in patients with idiopathic cervical dystonia. The presence of an attentional bias in patients with torticollis seem to indicate that alterations of attentional circuits might be implicated in the pathophysiology of this type of CD. (JINS, 2018, 24, 23–32)

Tactile Line-Bisection in Normal Subjects

1993 ◽  
Vol 76 (3) ◽  
pp. 831-836 ◽  
Author(s):  
Maria Levander ◽  
Richard Tegnér ◽  
Görel Caneman
Keyword(s):  
Confounding Factor ◽  
Normal Subjects ◽  
Spatial Position ◽  
Line Bisection ◽  
Bisection Task ◽  
Left Hand ◽  
Starting Condition ◽  
Line Bisection Task

The effects of spatial position, handedness, and hand of performance were assessed in 36 normal subjects using a tactile line-bisection task described in 1980 by Bowers and Heilman. An interaction between hand of performance and spatial position indicated that both hemispace and anatomical pathways determine laterality effects. Neither the left-hand superiority nor the leftward error in the midline condition by both hands found in an earlier study could be observed here. Only right-handers were influenced by starting condition, which in this setting acted as a spatial cue. Finally, some subjects used nonspatial strategies, a confounding factor that needs evaluation in further studies.

Individual Differences in the Flexibility of Peripersonal Space

2017 ◽  
Vol 64 (1) ◽  
pp. 49-55 ◽  
Author(s):  
Samuel B. Hunley ◽  
Arwen M. Marker ◽  
Stella F. Lourenco
Keyword(s):  
Individual Differences ◽  
Peripersonal Space ◽  
The Body ◽  
Laser Pointer ◽  
Baseline Measure ◽  
Bisection Task ◽  
Defensive Function ◽  
Representational Space ◽  
Laser Condition ◽  
Line Bisection Task

Abstract. The current study investigated individual differences in the flexibility of peripersonal space (i.e., representational space near the body), specifically in relation to trait claustrophobic fear (i.e., fear of suffocating or being physically restricted). Participants completed a line bisection task with either a laser pointer (Laser condition), allowing for a baseline measure of the size of one’s peripersonal space, or a stick (Stick condition), which produces expansion of one’s peripersonal space. Our results revealed that individuals high in claustrophobic fear had larger peripersonal spaces than those lower in claustrophobic fear, replicating previous research. We also found that, whereas individuals low in claustrophobic fear demonstrated the expected expansion of peripersonal space in the Stick condition, individuals high in claustrophobic fear showed less expansion, suggesting decreased flexibility. We discuss these findings in relation to the defensive function of peripersonal space and reduced attentional flexibility associated with trait anxieties.

The line bisection task in the acute stage of hemianopia and neglect

2009 ◽  
Vol 36 (S 02) ◽  
Author(s):  
B Machner ◽  
A Sprenger ◽  
U Hansen ◽  
W Heide ◽  
C Helmchen
Keyword(s):  
Acute Stage ◽  
Line Bisection ◽  
Bisection Task ◽  
Line Bisection Task

scholarly journals No Evidence of Perceptual Pseudoneglect in Alexithymia

2021 ◽  
Vol 11 (3) ◽  
pp. 376
Author(s):  
Carmelo Mario Vicario ◽  
Gabriella Martino ◽  
Alex Marcuzzo ◽  
Giuseppe Craparo
Keyword(s):  
Right Hemisphere ◽  
Line Bisection ◽  
Mental Condition ◽  
Bisection Task ◽  
Rightward Shift ◽  
Behavioral Evidence ◽  
And Performance ◽  
The Right ◽  
Line Bisection Task ◽  
Tas 20

Neuroscience research links alexithymia, the difficulty in identifying and describing feelings and emotions, with left hemisphere dominance and/or right hemisphere deficit. To provide behavioral evidence for this neuroscientific hypothesis, we explored the relationship between alexithymia and performance in a line bisection task, a standard method for evaluating visuospatial processing in relation to right hemisphere functioning. We enrolled 222 healthy participants who completed a version of the 20-item Toronto Alexithymia Scale (TAS-20), which measures alexithymia, and were asked to mark (bisect) the center of a 10-cm horizontal segment. The results document a significant rightward shift in the center of the line in participants with borderline and manifest alexithymia compared with non-alexithymic individuals. The higher the TAS-20 score, the greater the rightward shift in the line bisection task. This finding supports the right hemisphere deficit hypothesis in alexithymia and suggests that visuospatial abnormalities may be an important component of this mental condition.

scholarly journals A Meta-Analysis of Line Bisection and Landmark Task Performance in Older Adults

2021 ◽  
Author(s):  
Gemma Learmonth ◽  
Marietta Papadatou-Pastou
Keyword(s):  
Meta Analysis ◽  
Line Length ◽  
Line Bisection ◽  
Group Level ◽  
Bisection Task ◽  
Leftward Bias ◽  
State Dependent ◽  
The Right ◽  
Meta Analyses ◽  
Line Bisection Task

AbstractYoung 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- or state-dependent factors.

Flanker interference effects in a line bisection task

2014 ◽  
Vol 232 (4) ◽  
pp. 1327-1334 ◽  
Author(s):  
Sergio Chieffi ◽  
Tina Iachini ◽  
Alessandro Iavarone ◽  
Giovanni Messina ◽  
Andrea Viggiano ◽  
...  
Keyword(s):  
Line Bisection ◽  
Interference Effects ◽  
Bisection Task ◽  
Line Bisection Task ◽  
Flanker Interference

Acute hemianopic patients do not show a contralesional deviation in the line bisection task

2009 ◽  
Vol 256 (2) ◽  
pp. 289-290 ◽  
Author(s):  
B. Machner ◽  
A. Sprenger ◽  
U. Hansen ◽  
W. Heide ◽  
C. Helmchen
Keyword(s):  
Line Bisection ◽  
Bisection Task ◽  
Line Bisection Task

scholarly journals When Far Becomes Near: Remapping of Space by Tool Use

2000 ◽  
Vol 12 (3) ◽  
pp. 415-420 ◽  
Author(s):  
Anna Berti ◽  
Francesca Frassinetti
Keyword(s):  
Tool Use ◽  
Right Hemisphere ◽  
The Body ◽  
Line Bisection ◽  
Human Studies ◽  
Bisection Task ◽  
Near Space ◽  
The Subject ◽  
Line Bisection Task ◽  
The Brain

Far (extrapersonal) and near (peripersonal) spaces are behaviorally defined as the space outside the hand-reaching distance and the space within the hand-reaching distance. Animal and human studies have confirmed this distinction, showing that space is not homogeneously represented in the brain. In this paper we demonstrate that the coding of space as “far” and “near” is not only determined by the hand-reaching distance, but it is also dependent on how the brain represents the extension of the body space. We will show that when the cerebral representation of body space is extended to include objects or tools used by the subject, space previously mapped as far can be remapped as near. Patient P.P., after a right hemisphere stroke, showed a dissociation between near and far spaces in the manifestation of neglect. Indeed, in a line bisection task, neglect was apparent in near space, but not in far space when bisection in the far space was performed with a projection lightpen. However, when in the far space bisection was performed with a stick, used by the patient to reach the line, neglect appeared and was as severe as neglect in the near space. An artificial extension of the patient's body (the stick) caused a remapping of far space as near space.

Hemispheric asymmetries in perceived depth revealed through a radial line bisection task

2015 ◽  
Vol 234 (3) ◽  
pp. 807-813 ◽  
Author(s):  
Ancrêt Szpak ◽  
Nicole A. Thomas ◽  
Michael E. R. Nicholls
Keyword(s):  
Line Bisection ◽  
Radial Line ◽  
Hemispheric Asymmetries ◽  
Bisection Task ◽  
Line Bisection Task
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