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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 17:38 |
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Conference: Bucharest University Faculty of Physics 2023 Meeting
Section: Biophysics; Medical Physics
Title:
The analysis of covert cogntion: Covert naming task
Authors:
Andrei-Alexandru VASILIU(1), Constantin Augustin Dan PISTOL(1), Irina OANE(2), Ioana MÎNDRUȚĂ(2), Andrei BARBORICĂ(1)
Affiliation:
1) University of Bucharest, Faculty of Physics, Department of Electricity, Solid-State Physics and Biophysics,Atomistilor Street 405, 077125 Măgurele, Ilfov, Romania
2) Emergency University Hospital of Bucharest, Department of Neurology, Laboratory of Epilepsy, Splaiul Independenței 169, București 050098
E-mail
andrei.vasiliu4@s.unibuc.ro
Keywords:
Brain, Covert Cognition, EEG, SEEG, Event Related Potentials, ERP, Matlab
Abstract:
The brain is a complex organ that controls important processes such as thought, memory, emotion and every process that regulates our bodies. Cognitive, sensory or motor stimulation produces a change in the brain's existing electrical activity, called evoked potentials. In order to analyse the evoked potentials produced by stimulation in the brain, certain stimulation paradigms are used. An example of such a paradigm is the Covert Naming paradigm which is based on a visual-auditory task carried out in the E-Prime program. It has a simple structure composed of 3 conditions (listening to stimuli, visualising and associating pairs of nonverbal stimuli and visualising and associating pairs of verbal stimuli). Following stimulation with the paradigm, evoked potential analysis (ERP) was performed using Matlab software, the aim being to observe specific responses in certain brain regions. Following the analysis, specific activations were observed on intracranial contacts located in brain regions such as: cingulate cortex, amygdala, insula and temporal gyrus. These activations were observed in approximately 70% of the recordings, with potentials located within 400-500 ms after stimulus onset. These regions are brain areas with major activity in processes underlying the inner awareness of language processing. The signal from the intracranial recording contacts was compared between all three conditions to observe the significant obtained differences. Thus, it is possible to observe or not the existence of activations in brain regions specific to language and cognitive processes.
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