Action/Verb processing: Debates in neuroimaging and the contribution of studies in patients with Parkinson's disease

Dement Neuropsychol. 2014 Jan-Mar;8(1):3-13. doi: 10.1590/S1980-57642014DN81000002.

Abstract

The objective of the current review was to verify whether studies investigating lexical-semantic difficulties in patients with Parkinson's disease (PD) support the Embodied Cognition model. Under this framework, it is predicted that patients with PD will have more difficulties in the semantic processing of action concepts (action verbs) than of motionless objects. We also verified how and whether these studies are following current debates of Neuroscience, particularly the debate between the Lexical and the Embodied Cognition models. Recent neuroimaging studies on the neural basis of the semantics of verbs were presented, as well as others that focused on the neural processing of verbs in PD. We concluded that few studies suitably verified the Embodied Cognition theory in the context of PD, especially using neuroimaging techniques. These limitations show there is much to investigate on the semantic difficulties with action verbs in these patients, where it is particularly important to control for psycholinguistic variables and the inherent semantic characteristics of verbs in future studies.

O objetivo deste trabalho foi verificar se estudos sobre dificuldades léxico-semânticas de pacientes com doença de Parkinson (DP) confirmam o modelo da Cognição Incorporada. Este propõe que pacientes com DP terão mais dificuldade no processamento semântico de conceitos de ações (verbos de ação) do que de objetos estáticos. Também verificamos se estes estudos seguem os debates atuais da Neurociência, e especialmente o debate entre o Modelo Lexical e a Cognição Incorporada. Estudos recentes sobre as bases neurais da semântica de verbos coletados através de neuroimagem foram descritos e após, foram apresentados aqueles que focalizaram o processamento neural de verbos em pacientes com DP. Concluímos que ainda existem poucos estudos que verificaram adequadamente a teoria da Cognição Incorporada no contexto da DP, especialmente utilizando neuroimagem. Estas limitações mostram que ainda existe muito para ser investigado sobre dificuldades semânticas de verbos nestes pacientes, principalmente controlando variáveis psicolinguísticas e características semânticas inerentes dos verbos.

Keywords: Parkinson's disease; language disorders; semantics.

Publication types

  • Review