July 2013
Volume 13, Issue 9
Free
Vision Sciences Society Annual Meeting Abstract  |   July 2013
The role of rSMG in volitional eye movements
Author Affiliations
  • M. R. Burke
    Institute of Psychological Sciences, University of Leeds, UK
  • P. Bramley
    Leeds Medical School, University of Leeds, UK
  • C. Gonzalez
    Institute of Psychological Sciences, University of Leeds, UK
  • D. J. McKeefry
    Bradford School of Optometry and Vision Science, University of Bradford, UK
Journal of Vision July 2013, Vol.13, 915. doi:10.1167/13.9.915
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      M. R. Burke, P. Bramley, C. Gonzalez, D. J. McKeefry; The role of rSMG in volitional eye movements. Journal of Vision 2013;13(9):915. doi: 10.1167/13.9.915.

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

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Abstract

We investigated the role played by the human supra-marginal gyrus (SMG) when observers learnt a task involving predictable sequences of saccadic eye movements. Typically, such sequence learning occurs very quickly (after one or two trials), and results in predictive eye movements that have shorter latencies compared to saccades made when the position is not known. Importantly, we demonstrate that when SMG function in the right cerebral hemisphere is disrupted using MRI-guided Transcranial Magnetic Stimulation (TMS) (see Figure 1, sup material), the ability to make short latency anticipatory saccades is significantly impaired. This is in contrast to random sequences (where the pattern of eye movements cannot be learned), and delivery of TMS to the right SMG had no effect (see figure 2, sup material). These results indicate that neural activity within the right SMG is essential for the processing and release of visual information necessary for making early predictive motor responses.

Meeting abstract presented at VSS 2013

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