RESUMO
Post-traumatic stress disorder (PTSD) is a neuropsychological condition caused by exposure to chronic stressors and extreme trauma. In past decades, Colombia (South America) has experienced high levels of armed conflict, which created an environment of chronic stress, resulting in an increased incidence of PTSD in children. Limited research exists on the effects of PTSD on emotional memory functioning of these Colombian youth living in chronically stressful environments. In the present study, 23 PTSD affected youth and 26 controls were asked to recall items from a memorised word list, as well as remembering details from a short emotional story. Although no significant differences were found for word list memory, deficits for emotional story content were found in the PTSD youth, particularly for facts involving negative emotional details. The latter may suggest a deficit in executive functioning for the integration of emotionally laden stimuli, perhaps induced as a by-product of their traumatic experiences.
Assuntos
Emoções/fisiologia , Transtornos de Estresse Pós-Traumáticos/psicologia , Adolescente , Criança , Colômbia , Feminino , Humanos , MasculinoRESUMO
BACKGROUND/OBJECTIVE: In the last decade, socio-political violence in Colombia (South America) has created an environment of extreme/chronic stress. In this study, brain imaging technology (fMRI) and behavioral task performance were used to measure potential deficits in executive functioning for emotional processing in Colombian children. METHOD: Participants (22 Post-Traumatic Stress Disorder, PTSD and 22 neurotypical, NT) were asked to perform a word task with implicit emotional salience, which required them to report the color of the ink in which a positive, negative or neutral word was printed. RESULTS: Mixed design analysis of variance showed no group differences in accuracy for determining ink color when presented as a positive or neutral word. However, PTSD children were significantly less accurate (negative words) and notably slower (both positive and negative words) at determining ink color when presented in the context of an emotional word. PTSD processing of positive and negative words was associated with hypoactivation in the superior and middle frontal gyri of the right hemisphere in comparison to NT children. CONCLUSIONS: These results may reflect a deficit in executive functioning for emotionally laden stimuli, perhaps induced as a by-product of their traumatic experiences.
ANTECEDENTES/OBJETIVO: En la última década, la violencia socio-política en Colombia, ha propiciado un ambiente generador de situaciones de estrés crónico/extremo. El presente estudio empleó resonancia magnética funcional, junto con tareas conductuales, para medir posibles déficits en el funcionamiento ejecutivo en una tarea de palabras con contenido emocional en una muestra de niños colombianos. MÉTODO: A los participantes (22 TEPT y 22 controles), se les pidió indicar el color de la palabra impresa, omitiendo el contenido emocional implícito positivo, neutro o negativo. RESULTADOS: El análisis de varianza de diseño mixto, no arrojó diferencias entre los grupos, en número de aciertos al determinar el color en que estaban impresas las palabras positivas o neutras. Sin embargo, los niños con TEPT tuvieron más errores con las palabras de contenido emocional negativo y fueron más lentos que los controles con palabras de valencia positiva o negativa. En cuanto a las palabras positivas y negativas, el grupo con TEPT se asoció a hipoactivación de los giros superior y medio frontal del hemisferio derecho, al compararlos con los controles. CONCLUSIONES: Estos resultados sugieren déficits en el funcionamiento ejecutivo para estímulos con contenido emocional, quizás como consecuencia de las experiencias traumáticas vividas por el grupo de TEPT.