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

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Andres, Michael [UCL] Geers, Laurie [UCL] Marnette, Sophie [UCL] Coyette, Françoise [UCL] Bonato, Mario [University of Padova] Masson, Nicolas [UCL]

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.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès libre
Publication date 2019
Language Anglais
Journal information "Journal of the International Neuropsychological Society" - Vol. 25, no. 6, p. 644-653 (2019)
Peer reviewed yes
Publisher Cambridge University Press (CUP)
issn 1355-6177
e-issn 1469-7661
Publication status Publié
Affiliations UCL - SSH/IPSY - Psychological Sciences Research Institute
UCL - SSS/IONS - Institute of NeuroScience
UCL - SSS/IONS/COSY - Systems & cognitive Neuroscience
Keywords General Neuroscience ; Clinical Psychology ; Psychiatry and Mental health ; Clinical Neurology
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Bibliographic reference Andres, Michael ; Geers, Laurie ; Marnette, Sophie ; Coyette, Françoise ; Bonato, Mario ; et. al. Increased Cognitive Load Reveals Unilateral Neglect and Altitudinal Extinction in Chronic Stroke. In: Journal of the International Neuropsychological Society, Vol. 25, no. 6, p. 644-653 (2019)
Permanent URL http://hdl.handle.net/2078.1/216139