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Ipsilesional bias and processing speed are important predictors of functional dependency in the neglect phenomenon after a right hemisphere stroke.

Journal article
Authors Jo Inge Viken
Katarina Jood
Christina Jern
Christian Blomstrand
Hans Samuelsson
Published in The Clinical neuropsychologist
Volume 28
Issue 6
Pages 974-93
ISSN 1744-4144
Publication year 2014
Published at Institute of Biomedicine, Department of Medical and Clinical Genetics
Institute of Neuroscience and Physiology, Department of Clinical Neuroscience and Rehabilitation
Department of Psychology
Pages 974-93
Language en
Links dx.doi.org/10.1080/13854046.2014.95...
Keywords Aged, Attention, Female, Functional Laterality, Humans, Logistic Models, Male, Middle Aged, Neuropsychological Tests, Perceptual Disorders, diagnosis, etiology, physiopathology, Prognosis, Space Perception, Stroke, complications, physiopathology, Visual Perception
Subject categories Neurology

Abstract

Visuospatial neglect (VSN) predicts unfavorable functional outcome in stroke patients. This study examined the relative importance of different core symptoms of VSN as predictors of functional dependency. A consecutive series of 105 right hemisphere stroke patients were tested early after stroke on three basic symptoms of VSN (omissions, asymmetry of omissions and ipsilesional bias of attention) and on two symptoms related to VSN (processing speed and repetitive target detections in visual search). Neurological deficits were also assessed. Functional outcome was measured 3 months and 2 years after stroke with the modified Rankin Scale. Univariate analyses revealed significant relationships with functional outcome for both core and related symptoms of VSN and for neurological deficits. Area under the curve statistics and stepwise logistic regressions showed that the most important predictors assessed early after stroke were presence of ipsilesional bias for dependency at 3 months and visual processing speed for dependency at 2 years after stroke. These results show that valuable prognostic information regarding dependency after right hemisphere stroke can be obtained by assessing fundamental sub-components of VSN early after stroke. The development of standardized clinical methods for investigation of sub-components, such as a right capture of attention and processing speed, is essential.

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