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Transcranial Magnetic Stimulation of Early Visual Cortex During Transsaccadic Integration of Object Features

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dc.contributor.advisorCrawford, John Douglas
dc.creatorMalik, Pankhuri
dc.date.accessioned2015-08-28T12:58:42Z
dc.date.available2015-08-28T12:58:42Z
dc.date.copyright2014-03-19
dc.date.issued2015-08-28
dc.date.updated2015-08-28T12:58:42Z
dc.degree.disciplineBiology
dc.degree.levelMaster's
dc.degree.nameMSc - Master of Science
dc.description.abstractVisual information is integrated across saccades to maintain a continuous spatiotemporal representation of the world. This study investigated the role of early visual cortex (EVC) in trans-saccadic integration using functional magnetic resonance imaging guided repetitive transcranial magnetic stimulation (rTMS) protocol. Triple-pulse rTMS was applied over left and right EVC during the fixation task (participants maintained gaze), and saccade task (participants made an eye movement that either maintained or reversed the visual quadrant of the test stimulus). rTMS had no effect when 1) fixation was maintained, 2) saccades kept the stimulus in the same visual quadrant, or 3) quadrant corresponding to the first Gabor patch was stimulated. However, rTMS affected performance (relative to opposite EVC rTMS) when saccades brought the remembered visual stimulus into the magnetically stimulated quadrant. This effect increased with saccade amplitude. These results show that EVC is involved in the memory and ‘remapping’ of visual features across saccades.
dc.identifier.urihttp://hdl.handle.net/10315/29779
dc.language.isoen
dc.rightsAuthor owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
dc.subjectBiology
dc.subjectNeurosciences
dc.subjectBehavioral sciences
dc.subject.keywordsTrans-saccadic memory
dc.subject.keywordsSpatial constancy
dc.subject.keywordsVisual remapping
dc.subject.keywordsSpatial updating
dc.subject.keywordsEarly visual cortex
dc.subject.keywordsTranscranial magnetic stimulation
dc.subject.keywordsFunctional magnetic resonance imaging
dc.subject.keywordsSaccade
dc.subject.keywordsFixation
dc.subject.keywordsVisual quadrants
dc.titleTranscranial Magnetic Stimulation of Early Visual Cortex During Transsaccadic Integration of Object Features
dc.typeElectronic Thesis or Dissertationen_US

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