Brain localization of semantic processing

• Published in: Revista de neurologiá Vol. 69; no. 1; p. 1
• Main Authors: Alvarez-Merino, P, Requena, C, Salto, F
• Format: Journal Article
• Language: Spanish
• Published: Spain 01.07.2019
• ISSN: 1576-6578; 1576-6578
• DOI: 10.33588/rn.6901.2018458

Semantic content processing is associated with the potential N400, and the P600 is linked with the processing of syntactic and grammatical rules. To verify whether the semantic processing of complex visual stimuli such as repetition, identity, order and double incongruence is recursive or computable. 27 university students responded to an adapted N400 paradigm with five conditions, each with 80 tasks, while recording their brain activity with a 64-channel cap. Two temporal windows of 400 to 550 ms and 550 to 800 ms were analyzed using an ANOVA contrast of the condition factor by regions of interest. In addition, the inverse solution of the windows was calculated by low resolution electromagnetic tomography (LORETA) to identify the main sources related to the electrical power. The significant differences (p <0.05) in the results for the N400 and P600 in frontal and centroparietal areas in the logical operators studied are corroborated. It is confirmed that the brain processing of complex images is modulated by repetition, identity and order, but not by negation. Therefore, it can be said that the semantic processing of complex images is semi-computable.