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All fields Title Creator / Publisher Keyword Year AND OR AND NOT All fields Title Creator / Publisher Keyword Year AND OR AND NOT All fields Title Creator / Publisher Keyword Year AND OR AND NOT All fields Title Creator / Publisher Keyword Year AND OR AND NOT All fields Title Creator / Publisher Keyword Year Sort by creator [A → Z]' creator [Z → A]' publishing year ↑ (asc)' publishing year ↓ (desc)' title [A → Z]' title [Z → A]' Simple Search Hits 1 – 13 of 13 1 Semantic activation in Parkinson's disease patients on and off levodopa Angwin, Anthony J.; Arnott, Wendy L.; Copland, David A.. - : Elsevier Masson, 2009 BASE Show details 2 Hemispheric contributions to semantic activation: A divided visual field and event-related potential investigation of time-course. Smith, Erin R.; Chenery, Helen J.; Angwin, Anthony J.. - : Elsevier, 2009 BASE Show details 3 Dopaminergic neuromodulation of semantic processing: A 4-T fMRI study with levodopa Copland, David A.; McMahon, Katie L.; Silburn, Peter A.. - : Oxford University Press., 2009 BASE Show details 4 Verbal fluency, semantics, context and symptom complexes in schizophrenia Vogel, Adam P.; Chenery, Helen J.; Dart, Catriona M.. - : Springer New York LLC, 2009 BASE Show details 5 Impaired semantic inhibition during lexical ambiguity repetition in parkinson's disease Copland, David A.; Sefe, Gameli; Ashley, Jane. - : Elsevier Masson, 2009 BASE Show details 6 The basal ganglia circuits, dopamine, and ambiguous word processing: A neurobiological account of priming studies in Parkinson's disease Chenery, Helen J.; Angwin, Anthony J.; Copland, David A.. - : Cambridge University Press, 2008 BASE Show details 7 Transdermal nicotine modulates strategy-based attentional semantic processing in non-smokers Holmes, Anna D.; Chenery, Helen J.; Copland, David A.. - : Cambridge University Press, 2008 BASE Show details 8 Neural correlates of semantic priming for ambiguous words: An event-related fMRI study Copland, David A.; de Zubicaray, Greig I.; McMahon, Katie. - : Elsevier BV, 2007 BASE Show details 9 The speed of lexical activation is altered in Parkinson's disease Angwin, Anthony J.; Chenery, Helen J.; Copland, David A.; Murdoch, Bruce E.; Silburn, Peter A.. - : Taylor & Francis Inc, 2007 Abstract: Disturbed comprehension of complex noncanonical sentences in Parkinson's disease (PD) has been linked to dopamine depletion and delayed lexical retrieval. The aim of the present study was to replicate findings of delayed lexical activation in PD patients with noncanonical sentence processing difficulties, and investigate the influence of dopamine depletion on these changes to lexical access. In the first experiment, 20 patients with PD (tested whilst 'on' dopaminergic medication) and 23 controls participated in a list priming experiment. In this paradigm, stimuli are presented as a continuous list of words/nonwords, and semantic priming effects were measured across inter-stimulus intervals (ISIs) of 500 ms, 1000 ms and 1500 ms, with data analyzed using multivariate analyses of variance. The results revealed longer delays in lexical activation for PD patients with poor comprehension of noncanonical sentences, suggesting that the speed of lexical access may be compromised in PD, and that this feature may contribute to certain sentencecomprehension difficulties. In the second experiment, 7 patients with PD who participated in the first experiment, performed the same lexical decision task while 'off' their dopaminergic medication. Semantic priming effects were measured across ISIs of 500 ms and 1500 ms. Within group comparisons revealed a different pattern of semantic priming for the PD patients when 'on' compared to 'off' medication, providing further support for a dopaminergic influence on the speed of information processing and lexical activation. Keyword: 380102 Learning; 380302 Linguistic Processes (incl. Speech Production and Comprehension); 730303 Occupational; Aphasia; Basal Ganglia; C1; Clinical; Clinical Neurology; Cognition and Language; Constructions; Dopaminergic Modulation; Fmri; Memory; Processing Speed; Psychology; Resource; Semantic Activation; speech and physiotherapy; Supports Sentence Comprehension; Time-course URL: https://espace.library.uq.edu.au/view/UQ:127625 BASE Hide details 10 Self-paced reading and sentence comprehension in Parkinson's disease Angwin, Anthony J.; Chenery, Helen J.; Copland, David A.. - : Pergamon, 2006 BASE Show details 11 Summation of semantic priming and complex sentence comprehension in Parkinson's disease Angwin, Anthony J.; Chenery, Helen J.; Copland, David A.. - : Elsevier Science, 2005 BASE Show details 12 Hemispheric contributions to lexical ambiguity resolution: Evidence from individuals with complex language impairment following left-hemisphere lesions Copland, David A.; Chenery, Helen J.; Murdoch, Bruce E.. - : Elsevier, 2002 BASE Show details 13 Discourse priming of homophones in individuals with dominant subcortical lesions, cortical lesions, and Parkinson’s disease Copland, David A.; Chenery, Helen J.; Murdoch, Bruce E.. - : Psychology Press, 2001 BASE Show details

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