Postersession 2
Poster #: 119
Topic: Speech and language (incl. deficits)
Thursday, Sep 10, 2015
14:30-16:00
1st floor
New behavioral paradigm that generates event related potentials associated with language and action
1Bioingeniering, University of Antioquia, Colombia
2Neurociencias, University of Antioquia, Colombia
sebasorozcoh@gmail.com
Background: Action and language are linked with words or verbs that refer to acts which are carried out with body parts. It has been established that such words have a somatotopic representation that is overlapping with motor areas that are activated when the movements are executed. On the other hand, Fischler works allow to demonstrate that the N400 component is linked with the semantic relationship among the main nouns in a sentence, more than with the accuracy of the same. Therefore, the research question to solve is: is it possible to elicit a N400 component with incongruences of semantic relationships in language and action?
Methods: A new behavioral paradigm was designed based on the background presented. It aimed to elicit an event related potential (ERP) associated with language and action. Images of objects and actions done with body parts were combined to design the paradigm. The effect of semantic priming was implemented to evaluate its motor content, whether it is motor congruent, non-motor congruent and incongruent. EEG signals were recorded on 12 healthy subjects while they were taking the test.
Results: it is established that for incongruent stimulus (object-object), the deflection to 400ms is significantly different than in the other stimuli present in the paradigm.
Conclusions: It was demonstrated that the implementation of this new paradigm elicits a N400 component. We suggest that it could be implemented in studies related to failures of the neural processing of language.