Lesions and reduced working memory impair emotion recognition in self and others.

Emotion recognition (ER) can be conceived of as an integration of affective cues in working memory. We examined whether reduced working memory capacity and brain lesions in neural networks involved in emotion processing interactively impair ER of both one's own and another person's emotions. To assess the recognition of one's own and other's emotions, pictures from the International Affective Picture System (IAPS) and facial expressions from the Karolinska Directed Emotional Faces (KDEF) database representing fear, anger, disgust, and sadness were presented to 40 lesioned patients and 40 healthy students. To manipulate working memory, a math task was imposed between exposure to the stimuli and collection of responses. Participants indicated the intensity of each of the four emotions for each picture. ER was computed as the difference between trials where the elicited emotion matched the requested emotion and trials where the elicited and requested emotions did not match. Whereas lesions impaired ER in both self and others, working memory load exclusively decreased recognition of other persons' emotions.