The contribution of the left dorsolateral prefrontal cortex (DLPFC) as metacognitive control mechanism in attentional performance. An rTMS application

Michela Balconi, Alessandro Segurini

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The cortical contribution in response to sustained attention was explored in the present research by using brain stimulation. Thus, repetitive transcranial magnetic stimulation (rTMS) is a potent tool that can be used to modify activity of targeted cortical areas. The effect of this stimulation technique on attentional processes was explored in the present research, which focalized on the sustained attentional task (Stroop task). High-frequency (10 HZ) rTMS stimulation was induced on the left dorsolateral prefrontal cortex (DLPFC) when subjects performed the Stroop task. The 10 Hz stimulation was able to induce a temporary potentiation of the cortical responsiveness by improving the neuron polarization activity. One control condition was provided, in addition to the DLPFC stimulation, that is sham stimulation. Based on this evidence we supposed the rTMs stimulation may increase the subjects’ performance in terms of both accuracy (number of correct responses) and efficiency (reduced RTs) when DLPFC was stimulated. The statistical results showed a consistent increased ability to focalize and sustain the attentional behavior, with significant more correct responses and shorter RTs. The effect of the left DLPFC was compared with previous studies that used low-frequency stimulation (inhibition paradigm) or that applied the stimulation on the controlateral (right) hemisphere. Specifically, the control functions of a frontal network, which includes the DLPFC, were largely discussed.
Original languageEnglish
Title of host publicationProceedings of the "5th Biennal Meeting of the EARLI Special Interest Group I6 Metacognition"
Pages106
Number of pages1
Publication statusPublished - 2012
Event5th Biennal Meeting of the EARLI Special Interest Group I6 Metacognition - Milano
Duration: 5 Sep 20128 Sep 2012

Conference

Conference5th Biennal Meeting of the EARLI Special Interest Group I6 Metacognition
CityMilano
Period5/9/128/9/12

Keywords

  • neuropsychology

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