The effects of TMS over dorsolateral prefrontal cortex on multiple visual object memory across fixation and saccades

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dc.contributor.advisorCrawford, John Douglas
dc.creatorTanaka, Leiko Lauren
dc.date.accessioned2016-09-21T16:23:00Z
dc.date.available2016-09-21T16:23:00Z
dc.date.copyright2013-08
dc.degree.disciplinePsychology (Functional Area: Brain, Behaviour & Cognitive Sciences)
dc.degree.levelMaster's
dc.degree.nameMA - Master of Arts
dc.description.abstractTrans-saccadic memory, the process by which the visual system maintains the spatial position and features of objects across eye movements, is thought to be a form of visual working memory (Irwin, 1991). It has been shown that TMS over the frontal and parietal eye fields degrades trans-saccadic memory of multiple object features (Prime et al., 2008, 2010). We used a similar TMS protocol to investigate whether dorsolateral prefrontal cortex (DLPFC) is also involved in trans-saccadic memory. We predicted that performance would be disrupted similarly during either fixation or saccades. Instead, we found both task and hemisphere-dependent effects. During fixation, TMS over left DLPFC produced inconsistent effects, whereas TMS over right DLPFC reduced performance, consistent with its known role in working memory (Goldman-Rakic, 1987). In contrast, TMS over both sides of DLPFC enhanced trans-saccadic memory, suggesting a dis-inhibition of trans-saccadic processing. These results suggest that visual working memory during fixation and trans-saccadic memory may be supported by different, but interacting, neural circuits.
dc.identifier.urihttp://hdl.handle.net/10315/32378
dc.rightsAuthor owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
dc.subject.keywordsTrans-saccadic memory
dc.subject.keywordsVisual working memory
dc.subject.keywordsDorsolateral prefrontal cortex
dc.subject.keywordsDLPFC
dc.subject.keywordsTranscranial magnetic stimulation
dc.subject.keywordsTMS
dc.subject.keywordsFixation
dc.subject.keywordsSaccades
dc.titleThe effects of TMS over dorsolateral prefrontal cortex on multiple visual object memory across fixation and saccades
dc.typeElectronic Thesis or Dissertation

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