Abril-Ronderos Juan Pablo, Alvarado-Rojas Catalina, Lamprea Marisol R
Laboratorio de Neurociencias, Departamento de Psicología, Facultad de Ciencias Humanas, Universidad Nacional de Colombia, Bogotá, Colombia.
Department of Electronics Engineering, Pontificia Universidad Javeriana, Bogotá, Colombia.
Int J Psychophysiol. 2023 Jun;188:55-61. doi: 10.1016/j.ijpsycho.2023.03.008. Epub 2023 Mar 24.
Emotion and working memory are key components in daily life experiences. Previous research has already established a connection between these processes but the neural substrates of this relationship remain an open discussion. The present study aimed to investigate the effects of the use of pictures with emotional valence on the performance of a working memory task as well as the neuronal response during the task. For this purpose, 32 participants performed a 2-back task with negative, positive, and neutral images selected from the International Affective Pictures System (IAPS). No significant difference was found in the performance or in the response time related to the valence of the images. Repeated-measures ANOVA with hemisphere and valence as factors revealed an increase of the activity in the right hemisphere for the amplitude of the ERP P3 component and for the time-locked theta power for all the images. The P3 component in the right hemisphere additionally showed greater mean amplitude for the negative images as compared to the neutral and positive ones. Together, these results suggest a predominant role of the right hemisphere for the processing of both working memory and emotional information, as well as a higher neuronal resource allocation to the processing of negative valence images which enabled a proper performance of the working memory task for the negative images.
情绪和工作记忆是日常生活体验中的关键组成部分。先前的研究已经在这些过程之间建立了联系，但这种关系的神经基础仍有待探讨。本研究旨在调查使用具有情感效价的图片对工作记忆任务表现以及任务期间神经元反应的影响。为此，32名参与者使用从国际情感图片系统（IAPS）中选取的负性、正性和中性图像进行了一项2-back任务。在与图像效价相关的表现或反应时间上未发现显著差异。以半球和效价为因素的重复测量方差分析显示，所有图像的ERP P3成分的振幅以及锁时θ波功率在右半球的活动增加。与中性和正性图像相比，右半球的P3成分在负性图像上还表现出更大的平均振幅。总之，这些结果表明右半球在工作记忆和情绪信息处理中起主要作用，并且在处理负性效价图像时神经元资源分配更高，这使得能够正确执行负性图像的工作记忆任务。
