October 2003
Volume 3, Issue 9
Free
Vision Sciences Society Annual Meeting Abstract  |   October 2003
Perisaccadic V1 activity is not due to shifting visuo-spatial attention
Author Affiliations
  • Ignacio Vallines
    Carl von Ossietzky University, Oldenburg, Germany
  • Ivan Bodis-Wollner
    State University of New York, USA Hanse Institute for Advance Studies, Delmenhorst, Germany
  • Jale Oezyurt
    Carl von Ossietzky University, Oldenburg, Germany
  • Roland M. Rutschmann
    Carl von Ossietzky University, Oldenburg, Germany
  • Mark W. Greenlee
    Carl von Ossietzky University, Oldenburg, Germany
Journal of Vision October 2003, Vol.3, 42. doi:10.1167/3.9.42
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      Ignacio Vallines, Ivan Bodis-Wollner, Jale Oezyurt, Roland M. Rutschmann, Mark W. Greenlee; Perisaccadic V1 activity is not due to shifting visuo-spatial attention. Journal of Vision 2003;3(9):42. doi: 10.1167/3.9.42.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

It has been previously shown in human imaging studies that striate cortex is active when saccadic eye movements are executed even in the absence of visual input. It is commonly accepted that a shift in visuo-spatial attention immediately precedes saccades. Therefore, it is plausible that perisaccadic V1 responses could be the product of this shift in visuospatial attention rather than being directly related to saccadic activity. We have studied functional MRI in 13 subjects who either executed saccades reflexively to visual targets or performed voluntary saccades in the absence of visual stimuli. Eye movements were recorded with an MR compatible eye tracker. Perisaccadic cortical responses were compared to responses obtained when attention was covertly directed to the same peripheral locations while maintaining central fixation. Results show, besides frontal and parietal activation foci, strong perisaccadic V1 activity whether a visual target is present or not. Shifts of attention are associated with activation in parietal and frontal cortices but not in V1. These findings suggest a dynamic interplay between visual and oculomotor cortex while subjects perform saccades.

Vallines, I., Bodis-Wollner, I., Oezyurt, J., Rutschmann, R. M., Greenlee, M. W.(2003). Perisaccadic V1 activity is not due to shifting visuo-spatial attention [Abstract]. Journal of Vision, 3( 9): 42, 42a, http://journalofvision.org/3/9/42/, doi:10.1167/3.9.42. [CrossRef]
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