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Increased Cognitive Load Reveals Unilateral Neglect and Altitudinal Extinction in Chronic Stroke

Published online by Cambridge University Press:  21 May 2019

Michael Andres*
Affiliation:
Psychological Sciences Research Institute, Université Catholique de Louvain, 1348, Louvain-la-Neuve, Belgium
Laurie Geers
Affiliation:
Psychological Sciences Research Institute, Université Catholique de Louvain, 1348, Louvain-la-Neuve, Belgium
Sophie Marnette
Affiliation:
Psychological Sciences Research Institute, Université Catholique de Louvain, 1348, Louvain-la-Neuve, Belgium
Françoise Coyette
Affiliation:
Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, 1200, Brussels, Belgium
Mario Bonato
Affiliation:
Department of General Psychology, University of Padua, 35122 Padua, Italy
Konstantinos Priftis
Affiliation:
Department of General Psychology, University of Padua, 35122 Padua, Italy
Nicolas Masson*
Affiliation:
Psychological Sciences Research Institute, Université Catholique de Louvain, 1348, Louvain-la-Neuve, Belgium Department of Psychology, University of Tübingen, 72074, Tübingen, Germany
*
Correspondence and reprint requests to: Nicolas Masson, Place Cardinal Mercier, 10, 1348 Louvain-la-Neuve, Belgium. E-mail: nicolas.masson@uclouvain.be; or Michael Andres, E-mail: michael.andres@uclouvain.be.
Correspondence and reprint requests to: Nicolas Masson, Place Cardinal Mercier, 10, 1348 Louvain-la-Neuve, Belgium. E-mail: nicolas.masson@uclouvain.be; or Michael Andres, E-mail: michael.andres@uclouvain.be.

Abstract

Objective: Neuropsychological studies suggest that the ability to compensate for the presence of spatial neglect highly depends on the attentional resources a patient can rely on. The present research aimed to study neglect in situations where attentional resources are limited due to multitasking. Method: We examined two patients more than 3 years after a right-hemispheric stroke. Both had received neuropsychological rehabilitation for left neglect and did not show any impairment in standard tests. We used a dual-task paradigm combining a peripheral target detection task with a central shape recognition task. Peripheral targets could appear in left/right positions but also in lower/upper positions. Results: In patient #1, dual-task condition exacerbated left neglect and extinction. Patient #2 did not show any sign of neglect along the horizontal axis, but omitted half of the lower targets when they were presented simultaneously with upper targets under dual-task condition. This behavior reflects altitudinal extinction as the detection of single targets appearing either in upper or lower position was preserved. Conclusion: The present findings show that dual-tasking is a sensitive tool for the quantitative and qualitative assessment of spatial attention deficits, which are often overlooked by standard methods, especially in chronic stage. (JINS, 2019, 25, 644–653)

Type
Case Report
Copyright
Copyright © INS. Published by Cambridge University Press, 2019. 

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References

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