Spatio-temporal brain dynamics of self-identity: an EEG source analysis of the current and past self.

Autor: Muñoz F; Center UCM-ISCIII for Human Evolution and Behavior, Avd. Monforte de Lemos, nº 5, Pabellón 14, 28029, Madrid, Spain.; Psychobiology and Methods for the Behavioral Sciences Department, Complutense University of Madrid, Madrid, Spain., Rubianes M; Center UCM-ISCIII for Human Evolution and Behavior, Avd. Monforte de Lemos, nº 5, Pabellón 14, 28029, Madrid, Spain. mrubiane@ucm.es.; Psychobiology and Methods for the Behavioral Sciences Department, Complutense University of Madrid, Madrid, Spain. mrubiane@ucm.es., Jiménez-Ortega L; Center UCM-ISCIII for Human Evolution and Behavior, Avd. Monforte de Lemos, nº 5, Pabellón 14, 28029, Madrid, Spain.; Psychobiology and Methods for the Behavioral Sciences Department, Complutense University of Madrid, Madrid, Spain., Fondevila S; Center UCM-ISCIII for Human Evolution and Behavior, Avd. Monforte de Lemos, nº 5, Pabellón 14, 28029, Madrid, Spain.; Psychobiology and Methods for the Behavioral Sciences Department, Complutense University of Madrid, Madrid, Spain., Hernández-Gutiérrez D; Center UCM-ISCIII for Human Evolution and Behavior, Avd. Monforte de Lemos, nº 5, Pabellón 14, 28029, Madrid, Spain., Sánchez-García J; Center UCM-ISCIII for Human Evolution and Behavior, Avd. Monforte de Lemos, nº 5, Pabellón 14, 28029, Madrid, Spain., Martínez-de-Quel Ó; Center UCM-ISCIII for Human Evolution and Behavior, Avd. Monforte de Lemos, nº 5, Pabellón 14, 28029, Madrid, Spain., Casado P; Center UCM-ISCIII for Human Evolution and Behavior, Avd. Monforte de Lemos, nº 5, Pabellón 14, 28029, Madrid, Spain.; Psychobiology and Methods for the Behavioral Sciences Department, Complutense University of Madrid, Madrid, Spain., Martín-Loeches M; Center UCM-ISCIII for Human Evolution and Behavior, Avd. Monforte de Lemos, nº 5, Pabellón 14, 28029, Madrid, Spain.; Psychobiology and Methods for the Behavioral Sciences Department, Complutense University of Madrid, Madrid, Spain.
Jazyk: angličtina
Zdroj: Brain structure & function [Brain Struct Funct] 2022 Jul; Vol. 227 (6), pp. 2167-2179. Date of Electronic Publication: 2022 Jun 07.
DOI: 10.1007/s00429-022-02515-9
Abstrakt: Current research on self-identity suggests that the self is settled in a unique mental representation updated across the lifespan in autobiographical memory. Spatio-temporal brain dynamics of these cognitive processes are poorly understood. ERP studies revealed early (N170-N250) and late (P3-LPC) waveforms modulations tracking the temporal processing of global face configuration, familiarity processes, and access to autobiographical contents. Neuroimaging studies revealed that such processes encompass face-specific regions of the occipitotemporal cortex, and medial cortical regions tracing the self-identity into autobiographical memory across the life span. The present study combined both approaches, analyzing brain source power using a data-driven, beamforming approach. Face recognition was used in two separate tasks: identity (self, close friend and unknown) and life stages (childhood, adolescence, adulthood) recognition. The main areas observed were specific-face areas (fusiform area), autobiographical memory areas (medial prefrontal cortex, parahippocampus, posterior cingulate cortex/precuneus), along with executive areas (dorsolateral prefrontal and anterior temporal cortices). The cluster-permutation test yielded no significant early effects (150-200 ms). However, during the 250-300 ms time window, the precuneus and the fusiform cortices exhibited larger activation to familiar compared to unknown faces, regardless of life stages. Subsequently (300-600 ms), the medial prefrontal cortex discriminates between self-identity vs. close-familiar and unknown. Moreover, significant effects were found in the cluster-permutation test specifically on self-identity discriminating between adulthood from adolescence and childhood. These findings suggest that recognizing self-identity from other facial identities (diachronic self) comprises the temporal coordination of anterior and posterior areas. While mPFC maintained an updated representation of self-identity (diachronic self) based on actual rewarding value, the dlPFC, FG, MTG, paraHC, PCC was sensitive to different life stages of self-identity (synchronic self) during the access to autobiographical memory.
(© 2022. The Author(s).)
Databáze: MEDLINE
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