Cited by 48Spatial Neglect and Hemispheric DysfunctionTranscranial Magnetic Stimulation StudiesVisual perception and processing mechanisms

Low frequency transcranial magnetic stimulation on the posterior parietal cortex induces visuotopically specific neglect-like syndrome

Valero-Cabré, A., Rushmore, R. J., Payne, B. R.·2006·Experimental Brain Research

Abstract

The visuo-parietal (VP) region of the cerebral cortex is critically involved in the generation of orienting responses towards visual stimuli. In this study we use repetitive transcranial magnetic stimulation (rTMS) to unilaterally and non-invasively deactivate the VP cortex during a simple spatial visual detection task tested in real space. Adult cats were intensively trained over 4 months on a task requiring them to detect and orient to a peripheral punctuate static LED presented at a peripheral location between 0 degrees and 90 degrees , to the right or left of a 0 degrees fixation target. In 16 different interleaved sessions, real or sham low frequency (1 Hz) rTMS was unilaterally applied during 20 min (1,200 pulses) to the VP cortex. The percentage of mistakes detecting and orienting to contralateral visual targets increased significantly during the 15-20 min immediately following real but not sham rTMS. Behavioral deficits were most marked in peripheral eccentricities, whereas more central locations were largely unaffected. Performance returned to baseline (pre-TMS) levels when animals were tested 45 min later and remained in pre-TMS levels 24 h after the end of the stimulation. Our results confirm that the VP cortex of the cat is critical for successful detection and orienting to visual stimuli presented in the corresponding contralateral visual field. In addition, we show that rTMS disrupts a robust behavioral task known to depend on VP cortex and does so for the far periphery of the visual field, but not for more central targets.

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Crossref · 10.1007/s00221-005-0307-4

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Authors
Valero-Cabré, A., Rushmore, R. J., & Payne, B. R.
Affiliations
Boston University (US)
Venue
Experimental Brain Research
Published
2006-01-18
Volume
172
Issue
1
Pages
14-21
ISSN
  • 0014-4819 (ISSN-L)
  • 1432-1106
OpenAlex
W2148451215
Cited by
48
References
26
Citations by year
2025: 1 · 2024: 1 · 2021: 1 · 2020: 1 · 2019: 2 · 2017: 3 · 2016: 1 · 2015: 2 · 2014: 2 · 2013: 5 · 2012: 8
FWCI
1.94
Type
journal article
Language
en
Open access
closed
Locations
  • Experimental Brain Research (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • School of Medicine, Boston University
  • National Institute of Neurological Disorders and Stroke (R01NS047754, NS47754, NS32137, R01NS033975, R01NS032137, NS33975)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Spatial Neglect and Hemispheric Dysfunction
  • Life Sciences › Neuroscience › Neurology › Transcranial Magnetic Stimulation Studies
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
Keywords
posterior parietal cortex, cortical deactivation, visual detection, visual orienting, peripheral visual field, contralateral visual field, cats
MeSH terms
Animals, Brain Mapping, Cats, Disease Models, Animal, Dose-Response Relationship, Radiation, Female, Functional Laterality, Parietal Lobe, Perceptual Disorders, Photic Stimulation, Space Perception, Time Factors, Visual Fields, Transcranial Magnetic Stimulation

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