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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.

Original publication

DOI

10.1080/02643294.2010.519699

Type

Journal article

Journal

Cogn Neuropsychol

Publication Date

05/2010

Volume

27

Pages

277 - 303

Keywords

Adult, Aged, Aged, 80 and over, Brain Mapping, Cerebral Cortex, Diffusion Tensor Imaging, Female, Humans, Male, Middle Aged, Nerve Fibers, Myelinated, Nerve Fibers, Unmyelinated, Neural Pathways, Perceptual Disorders, Space Perception