Browsing by Subject "Inhibitory tagging"

Now showing 1 - 2 of 2
  • Thumbnail Image
    Publication
    Open Access
    Modulation of visual attention processes by noninvasive electrical brain stimulation
    (Universidad de Murcia, 2023-02-08) Martínez Pérez, Víctor; Fuentes Melero, Luis José; Campoy Menéndez, Guillermo; Escuela Internacional de Doctorado
    La estimulación transcraneal eléctrica no invasiva (tES) es una técnica de estimulación cerebral capaz de modular la excitabilidad cortical que permite vincular procesos cognitivos y estructuras cerebrales en una relación de causalidad. En este proyecto de tesis doctoral se proponen una serie de estudios experimentales sobre diferentes procesos relacionados con la atención visual donde emplearemos diferentes variantes de esta técnica de neuromodulación (corriente directa y corriente alterna). Estos estudios parten del modelo de tres redes atencionales propuesto por Michael Posner y tienen como objetivo caracterizar mejor estas redes integrándolo en paradigmas de investigación más recientes como el inhibitory tagging, la self-attentional network, los componentes de vigilancia, el cronotipo, las oscilaciones de la atención y el mind-wandering. Nuestros resultados muestran la importancia de considerar y controlar las diferencias individuales de los participantes en su línea de base para predecir los efectos de estas técnicas de neuromodulación sobre el sistema atencional.
  • Thumbnail Image
    Publication
    Restricted
    Time course of the inhibitory tagging effect in ongoing emotional processing. A HD-tDCS study.
    (Elsevier, 2019-12) Castillo, Alejandro; Sánchez Pérez, Noelia; Vivas, Ana B.; Campoy, Guillermo; Fuentes Melero, Luis José; Martínez Pérez, Víctor; Psicología Básica y Metodología
    When a cueing procedure that usually triggers inhibition of return (IOR) effects is combined with tasks that tap semantic processing, or involve response-based conflict, an inhibitory tagging (IT) emerges that disrupts responses to stimuli at inhibited locations. IT seems to involve the executive prefrontal cortex, mainly the left dorsolateral prefrontal cortex (DLPFC), in cognitive conflict tasks. Contrary to other inhibitory effects, IT has been observed with rather short intervals, concretely when the stimulus onset asynchrony (SOA) between the prime presented at the cued location, and the subsequent target is 250 ms. Here we asked whether IT is also applied to ongoing emotional processing, and whether the left DLPFC plays a causal role in IT using HD-tDCS. In two experiments with an emotional conflict task, we observed reduced conflict effects, the signature of IT, when the prime word was presented at the cued location, and once again when the prime-target SOA was just 250 ms. Also, the IT effect was eliminated when cathodal stimulation was applied to the left DLPFC. These findings suggest that the IT effect involves areas of the executive attention network and cooperates with IOR to favor attentional allocation to novel unexplored objects/locations, irrespective of their emotional content.