Separating neural correlates of allocentric and egocentric neglect: distinct cortical sites and common white matter disconnections.

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@article{60d7e5b34ee7493ab6cc74e591d8c838,
title = "Separating neural correlates of allocentric and egocentric neglect: distinct cortical sites and common white matter disconnections.",
abstract = "Insights into the functional nature and neuroanatomy of spatial attention have come from research in neglect patients but to date many conflicting results have been reported. The novelty of the current study is that we used voxel-wise analyses based on information from segmented grey and white matter tissue combined with diffusion tensor imaging to decompose neural substrates of different neglect symptoms. Allocentric neglect was associated with damage to posterior cortical regions (posterior superior temporal sulcus, angular, middle temporal and middle occipital gyri). In contrast, egocentric neglect was associated with more anterior cortical damage (middle frontal, postcentral, supramarginal, and superior temporal gyri) and damage within subcortical structures. Damage to intraparietal sulcus (IPS) and the temporo-parietal junction (TPJ) was associated with both forms of neglect. Importantly, we showed that both disorders were associated with white matter lesions suggesting damage within long association and projection pathways such as the superior longitudinal, superior fronto-occipital, inferior longitudinal, and inferior fronto-occipital fascicule, thalamic radiation, and corona radiata. We conclude that distinct cortical regions control attention (a) across space (using an egocentric frame of reference) and (b) within objects (using an allocentric frame of reference), while common cortical regions (TPJ, IPS) and common white matter pathways support interactions across the different cortical regions.",
keywords = "Egocentric, Allocentric, Spatial attention, Diffusion tensor imaging, Voxel-based morphometry, Visual neglect",
author = "Magdalena Chechlacz and Pia Rotshtein and Wai-Ling Bickerton and Peter Hansen and Saumitra Deb and Glyn Humphreys",
year = "2010",
month = may,
day = "1",
doi = "10.1080/02643294.2010.519699",
language = "English",
volume = "27",
pages = "277--303",
journal = "Cognitive Neuropsychology",
issn = "0264-3294",
publisher = "Taylor & Francis",
number = "3",

}

RIS

TY - JOUR

T1 - Separating neural correlates of allocentric and egocentric neglect: distinct cortical sites and common white matter disconnections.

AU - Chechlacz, Magdalena

AU - Rotshtein, Pia

AU - Bickerton, Wai-Ling

AU - Hansen, Peter

AU - Deb, Saumitra

AU - Humphreys, Glyn

PY - 2010/5/1

Y1 - 2010/5/1

N2 - Insights into the functional nature and neuroanatomy of spatial attention have come from research in neglect patients but to date many conflicting results have been reported. The novelty of the current study is that we used voxel-wise analyses based on information from segmented grey and white matter tissue combined with diffusion tensor imaging to decompose neural substrates of different neglect symptoms. Allocentric neglect was associated with damage to posterior cortical regions (posterior superior temporal sulcus, angular, middle temporal and middle occipital gyri). In contrast, egocentric neglect was associated with more anterior cortical damage (middle frontal, postcentral, supramarginal, and superior temporal gyri) and damage within subcortical structures. Damage to intraparietal sulcus (IPS) and the temporo-parietal junction (TPJ) was associated with both forms of neglect. Importantly, we showed that both disorders were associated with white matter lesions suggesting damage within long association and projection pathways such as the superior longitudinal, superior fronto-occipital, inferior longitudinal, and inferior fronto-occipital fascicule, thalamic radiation, and corona radiata. We conclude that distinct cortical regions control attention (a) across space (using an egocentric frame of reference) and (b) within objects (using an allocentric frame of reference), while common cortical regions (TPJ, IPS) and common white matter pathways support interactions across the different cortical regions.

AB - Insights into the functional nature and neuroanatomy of spatial attention have come from research in neglect patients but to date many conflicting results have been reported. The novelty of the current study is that we used voxel-wise analyses based on information from segmented grey and white matter tissue combined with diffusion tensor imaging to decompose neural substrates of different neglect symptoms. Allocentric neglect was associated with damage to posterior cortical regions (posterior superior temporal sulcus, angular, middle temporal and middle occipital gyri). In contrast, egocentric neglect was associated with more anterior cortical damage (middle frontal, postcentral, supramarginal, and superior temporal gyri) and damage within subcortical structures. Damage to intraparietal sulcus (IPS) and the temporo-parietal junction (TPJ) was associated with both forms of neglect. Importantly, we showed that both disorders were associated with white matter lesions suggesting damage within long association and projection pathways such as the superior longitudinal, superior fronto-occipital, inferior longitudinal, and inferior fronto-occipital fascicule, thalamic radiation, and corona radiata. We conclude that distinct cortical regions control attention (a) across space (using an egocentric frame of reference) and (b) within objects (using an allocentric frame of reference), while common cortical regions (TPJ, IPS) and common white matter pathways support interactions across the different cortical regions.

KW - Egocentric

KW - Allocentric

KW - Spatial attention

KW - Diffusion tensor imaging

KW - Voxel-based morphometry

KW - Visual neglect

U2 - 10.1080/02643294.2010.519699

DO - 10.1080/02643294.2010.519699

M3 - Article

C2 - 21058077

VL - 27

SP - 277

EP - 303

JO - Cognitive Neuropsychology

JF - Cognitive Neuropsychology

SN - 0264-3294

IS - 3

ER -