Brain Structure and Function

, Volume 223, Issue 3, pp 1459–1471 | Cite as

Supramodal effect of rightward prismatic adaptation on spatial representations within the ventral attentional system

  • Isabel Tissieres
  • Eleonora Fornari
  • Stephanie Clarke
  • Sonia Crottaz-Herbette
Original Article
  • 380 Downloads

Abstract

Rightward prismatic adaptation (R-PA) was shown to alleviate not only visuo-spatial but also auditory symptoms in neglect. The neural mechanisms underlying the effect of R-PA have been previously investigated in visual tasks, demonstrating a shift of hemispheric dominance for visuo-spatial attention from the right to the left hemisphere both in normal subjects and in patients. We have investigated whether the same neural mechanisms underlie the supramodal effect of R-PA on auditory attention. Normal subjects underwent a brief session of R-PA, which was preceded and followed by an fMRI evaluation during which subjects detected targets within the left, central and right space in the auditory or visual modality. R-PA-related changes in activation patterns were found bilaterally in the inferior parietal lobule. In either modality, the representation of the left, central and right space increased in the left IPL, whereas the representation of the right space decreased in the right IPL. Thus, a brief exposure to R-PA modulated the representation of the auditory and visual space within the ventral attentional system. This shift in hemispheric dominance for auditory spatial attention offers a parsimonious explanation for the previously reported effects of R-PA on auditory symptoms in neglect.

Keywords

Supramodal Prismatic adaptation Functional MRI Ventral attentional system Inferior parietal lobule 

Abbreviations

AG

Angular gyrus

PSC

Percent signal changes

fMRI

Functional magnetic resonance imaging

IPL

Inferior parietal lobule

R-PA

Rightward prismatic adaptation

L-PA

Leftward prismatic adaptation

SMG

Supramarginal gyrus

Notes

Acknowledgements

The work was supported by Grants from the Swiss National Science Foundation to S. Crottaz-Herbette (Marie-Heim-Vögtlin fellowship FNS PMPDP3_129028) and S. Clarke (FNS 320030-159708) and from the Biaggi Foundation to S. Crottaz-Herbette. The work was supported by the Centre d’Imagerie BioMédicale (CIBM) of the University of Lausanne (UNIL). We thank Jean-Baptiste Ledoux for his help in data acquisition.

Compliance with ethical standards

Conflict of interest

The authors reported no conflict of interest.

Supplementary material

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Supplementary material 1 (DOCX 1209 KB)

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© Springer-Verlag GmbH Germany, part of Springer Nature 2017

Authors and Affiliations

  1. 1.Neuropsychology and Neurorehabilitation Service, Centre Hospitalier Universitaire Vaudois (CHUV)University of LausanneLausanneSwitzerland
  2. 2.CIBM (Centre d’Imagerie Biomédicale), Department of Radiology, Centre Hospitalier Universitaire Vaudois (CHUV)University of LausanneLausanneSwitzerland

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