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      EFECTOS EN LA AMPLITUD Y LA LATENCIA DEL COMPONENTE N170 ANTE LA PRESENTACIÓN DE ROSTROS EMOCIONALES DE IRA Y MIEDO Translated title: EFFECTS OF THE PRESENTATION OF FEAR AND ANGER EMOTIONAL FACES ON THE AMPLITUDE AND LATENCY OF THE N170 COMPONENT

      research-article
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      Psychologia. Avances de la Disciplina
      Universidad San Buenaventura
      Emoción, P1, N170, rostros, Emotion, P1, N170, faces

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          Abstract

          Resumen La discriminación de las emociones expresadas a nivel facial es importante para las relaciones sociales, la empatía y la interacción social. El objetivo de este estudio fue observar si existían diferencias en el procesamiento cortical ante dos emociones básicas, la ira y el miedo y definir si la percepción de la ira intensa genera una mayor modulación del componente N170 en amplitud y latencia en comparación con las imágenes de rostros con expresión de miedo intenso. Para este estudio se utilizó la técnica de potenciales evocados con un montaje de 32 canales. Se encontraron diferencias significativas en latencia para las imágenes de rostros que expresan ira intensa, comparados con la condición de imágenes de rostros de miedo intenso. Se encontraron diferencias tanto de la amplitud como de latencia ante imágenes de rostros de ira y miedo intensos en comparación con imágenes de rostros neutros.

          Translated abstract

          Abstract The discrimination of emotions expressed by the facial expressions is important for social relationships, empathy and social interactions. The main aim of this study was to study whether there were differences in the cortical processing to two basic emotions, anger and fear, and whether the perception of intense anger generates a higher modulation in amplitude and latency of the N170 component than intense fear. The technique used was event related potentials with a 32-channel montage. We found significant differences in the latency for images of faces expressing intense anger compared to the condition of images of faces of intense fear, as well as differences in amplitude in latency in response to the presentation of neutral faces in comparison to intense anger and fear.

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          Most cited references30

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          The many faces of configural processing.

          Adults' expertise in recognizing faces has been attributed to configural processing. We distinguish three types of configural processing: detecting the first-order relations that define faces (i.e. two eyes above a nose and mouth), holistic processing (glueing the features together into a gestalt), and processing second-order relations (i.e. the spacing among features). We provide evidence for their separability based on behavioral marker tasks, their sensitivity to experimental manipulations, and their patterns of development. We note that inversion affects each type of configural processing, not just sensitivity to second-order relations, and we review evidence on whether configural processing is unique to faces.
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            A neuromodulatory role for the human amygdala in processing emotional facial expressions.

            Localized amygdalar lesions in humans produce deficits in the recognition of fearful facial expressions. We used functional neuroimaging to test two hypotheses: (i) that the amygdala and some of its functionally connected structures mediate specific neural responses to fearful expressions; (ii) that the early visual processing of emotional faces can be influenced by amygdalar activity. Normal subjects were scanned using PET while they performed a gender discrimination task involving static grey-scale images of faces expressing varying degrees of fear or happiness. In support of the first hypothesis, enhanced activity in the left amygdala, left pulvinar, left anterior insula and bilateral anterior cingulate gyri was observed during the processing of fearful faces. Evidence consistent with the second hypothesis was obtained by a demonstration that amygdalar responses predict expression-specific neural activity in extrastriate cortex.
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              Dissociable neural responses to facial expressions of sadness and anger.

              Previous neuroimaging and neuropsychological studies have investigated the neural substrates which mediate responses to fearful, disgusted and happy expressions. No previous studies have investigated the neural substrates which mediate responses to sad and angry expressions. Using functional neuroimaging, we tested two hypotheses. First, we tested whether the amygdala has a neural response to sad and/or angry facial expressions. Secondly, we tested whether the orbitofrontal cortex has a specific neural response to angry facial expressions. Volunteer subjects were scanned, using PET, while they performed a sex discrimination task involving static grey-scale images of faces expressing varying degrees of sadness and anger. We found that increasing intensity of sad facial expression was associated with enhanced activity in the left amygdala and right temporal pole. In addition, we found that increasing intensity of angry facial expression was associated with enhanced activity in the orbitofrontal and anterior cingulate cortex. We found no support for the suggestion that angry expressions generate a signal in the amygdala. The results provide evidence for dissociable, but interlocking, systems for the processing of distinct categories of negative facial expression.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Journal
                psych
                Psychologia. Avances de la Disciplina
                Psychol. av. discip.
                Universidad San Buenaventura (Bogotá, Distrito Capital, Colombia )
                1900-2386
                June 2017
                : 11
                : 1
                : 39-48
                Affiliations
                [1] Bogotá Bogotá orgnameUniversidad El Bosque Colombia bonillafidel@ 123456unbosque.edu.co
                Article
                S1900-23862017000100039
                4f166fc9-1174-40dd-992e-d063dd433342

                This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

                History
                : 30 November 2016
                : 15 September 2015
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 39, Pages: 10
                Product

                SciELO Colombia


                Emotion,P1,rostros,N170,Emoción,faces
                Emotion, P1, rostros, N170, Emoción, faces

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