HapticV1, Main, Exploration, bibRecordById, Pascal:11-0321393

MULTIMODAL AND MULTISPATIAL DEFICITS OF VERTICALITY PERCEPTION IN HEMISPATIAL NEGLECT

Identifieur interne : 003323 ( Main/Exploration ); précédent : 003322; suivant : 003324

MULTIMODAL AND MULTISPATIAL DEFICITS OF VERTICALITY PERCEPTION IN HEMISPATIAL NEGLECT

Auteurs : K. S. Utz [Allemagne] ; I. Keller [Allemagne] ; F. Artinger [Allemagne] ; O. Stumpf [Allemagne] ; J. Funk [Allemagne] ; G. Kerkhoff [Allemagne]

Source :

Neuroscience [ 0306-4522 ] ; 2011.

RBID : Pascal:11-0321393

Descripteurs français

Pascal (Inist)
- Perception.

English descriptors

KwdEn :
- Perception.

Abstract

Recent evidence suggests that patients with left-sided visuospatial neglect often show deviations in their visual and haptic perception of verticality in the frontal and sagittal plane. However, little is known about the multimodality of these impairments and the relationship between deviations in the frontal and the sagittal plane. Moreover, no previous study has combined investigations of verticality judgments in both modalities and both spatial planes within the same sample of subjects using the same apparatus. Thus, the aim of the present study was to investigate both subjective visual vertical (SVV) and subjective haptic vertical (SHV) judgments in the frontal and the sagittal plane in right-brain-damaged patients with visuospatial neglect (n=16), right-brain-damaged patients without neglect (n=18) and age-matched healthy individuals (n=16) using the same testing device for all tasks. This allowed for direct comparisons of visual vs. haptic and frontal vs. sagittal verticality judgments. Neglect patients showed significant counterclockwise tilts in their SW and SHV judgments in the frontal plane as well as marked backward (upper end of the rod towards the observer) tilts in the sagittal plane. In contrast, right-brain-damaged patients without neglect and healthy individuals showed no marked deviations in the frontal plane, but small forward (upper end of the rod away from the observer) tilts in the sagittal plane. Moreover, neglect patients showed significantly higher unsigned errors in all tasks. These results demonstrate multimodal and multispatial deficits in the judgment of verticality in patients with visuospatial neglect which are most likely due to an altered representation of verticality caused by lesions of brain areas related to multisensory integration and space representation in the right temporoparietal cortex.

Affiliations:

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Le document en format XML

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<front><div type="abstract" xml:lang="en">Recent evidence suggests that patients with left-sided visuospatial neglect often show deviations in their visual and haptic perception of verticality in the frontal and sagittal plane. However, little is known about the multimodality of these impairments and the relationship between deviations in the frontal and the sagittal plane. Moreover, no previous study has combined investigations of verticality judgments in both modalities and both spatial planes within the same sample of subjects using the same apparatus. Thus, the aim of the present study was to investigate both subjective visual vertical (SVV) and subjective haptic vertical (SHV) judgments in the frontal and the sagittal plane in right-brain-damaged patients with visuospatial neglect (n=16), right-brain-damaged patients without neglect (n=18) and age-matched healthy individuals (n=16) using the same testing device for all tasks. This allowed for direct comparisons of visual vs. haptic and frontal vs. sagittal verticality judgments. Neglect patients showed significant counterclockwise tilts in their SW and SHV judgments in the frontal plane as well as marked backward (upper end of the rod towards the observer) tilts in the sagittal plane. In contrast, right-brain-damaged patients without neglect and healthy individuals showed no marked deviations in the frontal plane, but small forward (upper end of the rod away from the observer) tilts in the sagittal plane. Moreover, neglect patients showed significantly higher unsigned errors in all tasks. These results demonstrate multimodal and multispatial deficits in the judgment of verticality in patients with visuospatial neglect which are most likely due to an altered representation of verticality caused by lesions of brain areas related to multisensory integration and space representation in the right temporoparietal cortex.</div>
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MULTIMODAL AND MULTISPATIAL DEFICITS OF VERTICALITY PERCEPTION IN HEMISPATIAL NEGLECT

MULTIMODAL AND MULTISPATIAL DEFICITS OF VERTICALITY PERCEPTION IN HEMISPATIAL NEGLECT

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri