Drapeau Joanie, Gosselin Nathalie, Peretz Isabelle, McKerral Michelle
Centre for Interdisciplinary Research in Rehabilitation (CRIR), IURDPM, CIUSSS du Centre-Sud-de-l'Île-de-Montréal, Montreal, QC H3S 2J4, Canada.
Departement of Psychology, Université de Montréal, Montreal, QC H3C 3J7, Canada.
Brain Sci. 2019 Jun 18;9(6):142. doi: 10.3390/brainsci9060142.
The present study aimed to measure neural information processing underlying emotional recognition from facial expressions in adults having sustained a mild traumatic brain injury (mTBI) as compared to healthy individuals. We thus measured early (N1, N170) and later (N2) event-related potential (ERP) components during presentation of fearful, neutral, and happy facial expressions in 10 adults with mTBI and 11 control participants. Findings indicated significant differences between groups, irrespective of emotional expression, in the early attentional stage (N1), which was altered in mTBI. The two groups showed similar perceptual integration of facial features (N170), with greater amplitude for fearful facial expressions in the right hemisphere. At a higher-level emotional discrimination stage (N2), both groups demonstrated preferential processing for fear as compared to happiness and neutrality. These findings suggest a reduced early selective attentional processing following mTBI, but no impact on the perceptual and higher-level cognitive processes stages. This study contributes to further improving our comprehension of attentional versus emotional recognition following a mild TBI.
本研究旨在测量与健康个体相比，患有轻度创伤性脑损伤（mTBI）的成年人从面部表情中识别情绪时的神经信息处理过程。因此，我们在向10名患有mTBI的成年人和11名对照参与者呈现恐惧、中性和高兴的面部表情时，测量了早期（N1、N170）和晚期（N2）事件相关电位（ERP）成分。研究结果表明，在早期注意力阶段（N1），无论情绪表达如何，两组之间均存在显著差异，mTBI患者的该阶段发生了改变。两组在面部特征的感知整合方面（N170）表现相似，右半球对恐惧面部表情的反应幅度更大。在更高层次的情绪辨别阶段（N2），与高兴和中性表情相比，两组对恐惧表情均表现出优先处理。这些发现表明，mTBI后早期选择性注意力处理能力下降，但对感知和更高层次的认知过程阶段没有影响。本研究有助于进一步提高我们对轻度创伤性脑损伤后注意力与情绪识别的理解。
