Visual Attention in Posterior Stroke and Relations to Alexia

Research output: Contribution to journalJournal articlepeer-review

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Visual Attention in Posterior Stroke and Relations to Alexia. / Petersen, Anders; Vangkilde, Signe; Fabricius, Charlotte; Iversen, Helle Klingenberg; Delfi, Tzvetelina; Starrfelt, Randi.

In: Neuropsychologia, Vol. 92, 2016, p. 79-89.

Research output: Contribution to journalJournal articlepeer-review

Harvard

Petersen, A, Vangkilde, S, Fabricius, C, Iversen, HK, Delfi, T & Starrfelt, R 2016, 'Visual Attention in Posterior Stroke and Relations to Alexia', Neuropsychologia, vol. 92, pp. 79-89. https://doi.org/10.1016/j.neuropsychologia.2016.02.029

APA

Petersen, A., Vangkilde, S., Fabricius, C., Iversen, H. K., Delfi, T., & Starrfelt, R. (2016). Visual Attention in Posterior Stroke and Relations to Alexia. Neuropsychologia, 92, 79-89. https://doi.org/10.1016/j.neuropsychologia.2016.02.029

Vancouver

Petersen A, Vangkilde S, Fabricius C, Iversen HK, Delfi T, Starrfelt R. Visual Attention in Posterior Stroke and Relations to Alexia. Neuropsychologia. 2016;92:79-89. https://doi.org/10.1016/j.neuropsychologia.2016.02.029

Author

Petersen, Anders ; Vangkilde, Signe ; Fabricius, Charlotte ; Iversen, Helle Klingenberg ; Delfi, Tzvetelina ; Starrfelt, Randi. / Visual Attention in Posterior Stroke and Relations to Alexia. In: Neuropsychologia. 2016 ; Vol. 92. pp. 79-89.

Bibtex

@article{d17fcbcb79ed49569c9952f0c654a670,
title = "Visual Attention in Posterior Stroke and Relations to Alexia",
abstract = "Impaired visual attention is common following strokes in the territory of the middle cerebral artery, particularly in the right hemisphere, while attentional effects of more posterior lesions are less clear. Commonly, such deficits are investigated in relation to specific syndromes like visual agnosia or pure alexia. The aim of this study was to characterize visual processing speed and apprehension span following posterior cerebral artery (PCA) stroke. In addition, the relationship between these attentional parameters and single word reading is investigated, as previous studies have suggested that reduced visual speed and span may explain pure alexia. Eight patients with unilateral PCA strokes (four left hemisphere, four right hemisphere) were selected on the basis of lesion location, rather than the presence of any visual symptoms. Visual attention was characterized by a whole report paradigm allowing for hemifield-specific measurements of processing speed and apprehension span. All patients showed reductions in visual span contralateral to the lesion site, and four patients showed bilateral reductions in visual span despite unilateral lesions (2L; 2R). Six patients showed selective deficits in visual span, though processing speed was unaffected in the same field (ipsi- or contralesionally). Only patients with right hemifield reductions in visual span were impaired in reading, and this could follow either right or left lateralized stroke and was irrespective of visual field impairments. In conclusion, visual span may be affected bilaterally by unilateral PCA-lesions. Reductions in visual span may also be confined to one hemifield, and may be affected in spite of preserved visual processing speed. Furthermore, reduced span in the right visual field seems to be related to reading impairment in this group, regardless of lesion lateralization. ",
author = "Anders Petersen and Signe Vangkilde and Charlotte Fabricius and Iversen, {Helle Klingenberg} and Tzvetelina Delfi and Randi Starrfelt",
year = "2016",
doi = "10.1016/j.neuropsychologia.2016.02.029",
language = "English",
volume = "92",
pages = "79--89",
journal = "Neuropsychologia",
issn = "0028-3932",
publisher = "Pergamon Press",

}

RIS

TY - JOUR

T1 - Visual Attention in Posterior Stroke and Relations to Alexia

AU - Petersen, Anders

AU - Vangkilde, Signe

AU - Fabricius, Charlotte

AU - Iversen, Helle Klingenberg

AU - Delfi, Tzvetelina

AU - Starrfelt, Randi

PY - 2016

Y1 - 2016

N2 - Impaired visual attention is common following strokes in the territory of the middle cerebral artery, particularly in the right hemisphere, while attentional effects of more posterior lesions are less clear. Commonly, such deficits are investigated in relation to specific syndromes like visual agnosia or pure alexia. The aim of this study was to characterize visual processing speed and apprehension span following posterior cerebral artery (PCA) stroke. In addition, the relationship between these attentional parameters and single word reading is investigated, as previous studies have suggested that reduced visual speed and span may explain pure alexia. Eight patients with unilateral PCA strokes (four left hemisphere, four right hemisphere) were selected on the basis of lesion location, rather than the presence of any visual symptoms. Visual attention was characterized by a whole report paradigm allowing for hemifield-specific measurements of processing speed and apprehension span. All patients showed reductions in visual span contralateral to the lesion site, and four patients showed bilateral reductions in visual span despite unilateral lesions (2L; 2R). Six patients showed selective deficits in visual span, though processing speed was unaffected in the same field (ipsi- or contralesionally). Only patients with right hemifield reductions in visual span were impaired in reading, and this could follow either right or left lateralized stroke and was irrespective of visual field impairments. In conclusion, visual span may be affected bilaterally by unilateral PCA-lesions. Reductions in visual span may also be confined to one hemifield, and may be affected in spite of preserved visual processing speed. Furthermore, reduced span in the right visual field seems to be related to reading impairment in this group, regardless of lesion lateralization.

AB - Impaired visual attention is common following strokes in the territory of the middle cerebral artery, particularly in the right hemisphere, while attentional effects of more posterior lesions are less clear. Commonly, such deficits are investigated in relation to specific syndromes like visual agnosia or pure alexia. The aim of this study was to characterize visual processing speed and apprehension span following posterior cerebral artery (PCA) stroke. In addition, the relationship between these attentional parameters and single word reading is investigated, as previous studies have suggested that reduced visual speed and span may explain pure alexia. Eight patients with unilateral PCA strokes (four left hemisphere, four right hemisphere) were selected on the basis of lesion location, rather than the presence of any visual symptoms. Visual attention was characterized by a whole report paradigm allowing for hemifield-specific measurements of processing speed and apprehension span. All patients showed reductions in visual span contralateral to the lesion site, and four patients showed bilateral reductions in visual span despite unilateral lesions (2L; 2R). Six patients showed selective deficits in visual span, though processing speed was unaffected in the same field (ipsi- or contralesionally). Only patients with right hemifield reductions in visual span were impaired in reading, and this could follow either right or left lateralized stroke and was irrespective of visual field impairments. In conclusion, visual span may be affected bilaterally by unilateral PCA-lesions. Reductions in visual span may also be confined to one hemifield, and may be affected in spite of preserved visual processing speed. Furthermore, reduced span in the right visual field seems to be related to reading impairment in this group, regardless of lesion lateralization.

U2 - 10.1016/j.neuropsychologia.2016.02.029

DO - 10.1016/j.neuropsychologia.2016.02.029

M3 - Journal article

C2 - 26970141

VL - 92

SP - 79

EP - 89

JO - Neuropsychologia

JF - Neuropsychologia

SN - 0028-3932

ER -

ID: 158204677