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Lexical-semantic processing in the semantic priming paradigm in aphasic patients.
Jerusa Fumagalli de Salles1, Candice Steffen Holderbaum, Maria Alice Mattos Pimenta Parente
1Department of Developmental and Personality Psychology, Graduate Studies Program in Psychology, Institute of Psychology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre RS, Brazil. jerusafs@yahoo.com.br
Arquivos De Neuro-Psiquiatria
|September 20, 2012
Summary
This review explores lexical-semantic processing in aphasia using semantic priming. Findings show semantic priming effects in fluent and non-fluent aphasias, involving widespread brain networks.
Area of Science:
- Neuroscience
- Linguistics
- Cognitive Psychology
Background:
- Aphasia is characterized by explicit lexical-semantic processing deficits.
- These deficits may occur independently of implicit semantic impairment.
- The semantic priming paradigm is a key tool for assessment.
Purpose of the Study:
- Critically review international literature on lexical-semantic processing in aphasia.
- Focus on methodological strengths/weaknesses of semantic paradigms.
- Examine neuroimaging evidence for lexical-semantic processing.
Main Methods:
- Systematic literature review of studies using the semantic priming paradigm.
- Analysis of methodological aspects of semantic paradigms.
- Integration of findings with neuroimaging data from healthy and aphasic populations.
Main Results:
- Semantic priming effects are observable in both fluent and non-fluent aphasias.
- These effects engage an extensive neural network.
- Evidence supports dissociations between implicit and explicit lexical-semantic processing.
Conclusions:
- Lexical-semantic processing in aphasia is complex, involving distinct implicit and explicit components.
- The findings highlight the role of a distributed neural network in semantic priming.
- Further research can refine understanding of semantic deficits in aphasia.
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