The Brain Responses in Integration of Emotional information of Facial Expression and Emotional Prosody
Shih-Tseng T. Huang1,2; 1Department of Psychology, National Chung-Cheng University, Taiwan, 2Center for research in Cognitive Science, National Chung-Cheng University, Taiwan
The present study investigated the brain activity in processing facial expressions and emotional prosody. Nineteen young adults participated (9 males and 10 females). In each congruous pair, an angry (or neutral) voice fragment accompanied with a congruous angry (or neutral) facial expression. In each incongruous pair, angry prosody was paired with a neutral face, or a neutral face paired with angry voice. Ten runs of 80 trials were presented with two kinds of percentage in combinations of the congruous and incongruous trials. Five of them presented 80% congruous trials and 20% incongruous trials. The other five runs with reverse percentage of congruency containing 80% incongruous and 20% congruous trials. The results found a sex difference of N170 at PO8 indicating females were higher than the male participants. The analysis of mean amplitudes (MAs) of 300-500ms found higher activation at Pz than Cz and Fz, and Cz higher than Fz. It was also found that processing angry facial expression and prosody were higher in amplitudes than processing neutral expression and prosody at both F3 and F4. There was no significant congruency effect found. The results suggested sex difference at early stage of processing emotional facial and prosody. At 300-500ms, processing angry facial expressions and prosody were found higher than processing neutral faces and prosody, and higher activations in parietal lobes than at the central and frontal lobes. The results suggested that differentiation of the congruency of emotional and prosody might take place at an integration phase of processing.
Topic Area: EMOTION & SOCIAL: Emotional responding