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Semantic Feature Disturbance in Alzheimer Disease: Evidence from an Object Decision Task
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Alzheimer's disease is associated with distinctive semantic feature loss
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Lexical-semantic representation in bilingual aphasia: Findings from semantic priming and cognate repetition priming
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The Influence of Dopamine on Automatic and Controlled Semantic Activation in Parkinson's Disease
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Effect of aging on learning new names and descriptions for objects
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The influence of dopamine on automatic and controlled semantic activation in Parkinson's disease.
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Investigation of the non-markovity spectrum as a cognitive processing measure of deep brain microelectrode recordings
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Decreased semantic competitive inhibition in Parkinson's disease: Evidence from an investigation of word search performance
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Abstract:
Aberrant semantic competitive inhibition has been reported in Parkinson’s disease (PD). Whether PD-related alterations cause an increase or a decrease in lateral inhibition, however, remains unclear. Accordingly, the present study aimed to examine semantic inhibition during lexical-semantic processing in non-demented people with PD. Twenty-two people with PD and 18 matched controls completed a computerized word search task in which both the relationship between the background items and the target (related or unrelated) and the search type (open e.g., any dog or closed e.g., collie) were manipulated. It was hypothesized that decreased semantic inhibition would be evidenced by abnormally short response times for open searches among words related to the target, while increased inhibition would lead to abnormally long response times. Analysis of the results revealed that control participants performed open searches faster for unrelated vs related word lists. In contrast, the PD group recorded similar response times regardless of background items. Hence, the present findings are consistent with the notion of decreased semantic competitive inhibition in PD and suggest that an impaired ability to inhibit unwanted information during lexical retrieval may underlie observed deficits on semantic tasks such as verbal fluency. ©2010 The Speech Pathology Association of Australia Limited.
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Keyword:
1203 Language and Linguistics; 2733 Otorhinolaryngology; 2912 LPN and LVN; 2922 Research and Theory; 3616 Speech and Hearing; Activation; Cognitive-linguistic interactions; Deficits; Expressive Language; Language Processing; Models; Parkinson's disease; Retrieval; Sentence Comprehension; Speed; Task; Verbal Fluency
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URL: https://espace.library.uq.edu.au/view/UQ:218606
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Bilingualism and aging: reversal of the cognate advantage on older bilingual adults
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Semantic activation in Parkinson's disease patients on and off levodopa
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Hemispheric contributions to semantic activation: A divided visual field and event-related potential investigation of time-course.
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Verbal fluency, semantics, context and symptom complexes in schizophrenia
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Bilingualism and aging: Reversal of the cognate advantage in older bilingual adults
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Impaired semantic inhibition during lexical ambiguity repetition in parkinson's disease
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The influence of aging and aphasia on bilingual semantic organization
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