Browsing by Author "Edwards, Jodi"

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    Calgary Working Papers in Linguistics, Volume 24, Fall 2002
    (University of Calgary, 2002-09) Dobrovolsky, Michael; Edwards, Jodi
    The editors of this volume, Jodi Edwards and Michael Dobrovolsky are pleased to present the twenty-fourth issue of the Calgary Working Papers in Linguistics published by the Department of Linguistics at the University of Calgary. The papers contained in this volume represent works in progress and as such should not be considered in any way final or definitive.
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    Cue-Induced Brain Activity in Pathological Gamblers
    (Elsevier, 2005-11) Crockford, David N.; Goodyear, Bradley; Edwards, Jodi; Quickfall, Jeremy; el-Guebaly, Nady
    Previous studies using functional Magnetic Resonance Imaging (fMRI) have identified differential brain activity in healthy subjects performing gambling tasks and pathological gambling (PG) subjects with motivational and emotional predecessors for gambling and during tasks requiring response inhibition. The goal of the present study was to determine if PG subjects exhibit differential brain activity when exposed to visual gambling cues. Methods: 10 male DSM-IV-TR PG subjects and 10 matched healthy controls underwent fMRI during visual presentations of gambling-related video alternating with video of nature scenes. Results: PG subjects and controls exhibited overlap in areas of brain activity in response to the visual gambling cues; however, compared to control subjects, PG subjects exhibited significantly greater activity in the right dorsolateral prefrontal cortex (DLPFC), including the inferior and medial frontal gyri, the right parahippocampal gyrus, and left occipital cortex, including the fusiform gyrus. PG subjects also reported a significant increase in mean craving for gambling after the study. Post-hoc analyses revealed a dissociation in visual processing stream (dorsal vs. ventral) activation by subject group and cue type. Conclusions: These findings may represent a component of cue-induced craving for gambling or conditioned behavior that could underlie pathological gambling.
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    The neural substrates of phonological processing: an examination of neuroimaging research
    (University of Calgary, 2002-09) Edwards, Jodi
    Despite the use of standardized testing techniques designed to isolate phonological processes, previous attempts to localize the neural regions associated with phonological processing have produced highly variable results. The purpose of the present research is to integrate the results of a broad range of neuroimaging studies in order to identify the neural correlates of phonological processing. The present study applies the word production model proposed by Indefrey and Levelt to a sample of fMRI and MEG studies investigating phonological processing.The hypothesis of the present study is that the regions of activation found in the fMRI and MEG studies will parallel the neural regions in the cortical network described by Indefrey and Levett. This finding would suggest that current evidence for the localization of phonological processing is not inconsistent, but merely reflects activation in the various cortical regions corresponding to the different stages of phonological processing.
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    The role of syntactic form in incremental referential interpretation
    (2003) Edwards, Jodi; Chambers, Craig G.