Recognition of the Facial Expression after Diffuse Axonal Injury

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  • びまん性軸索損傷が表情の識別にもたらす影響

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<p>  Impairments in recognition of facial emotional expressions are significant problems for people with traumatic brain injury. Furthermore, patients without evidence of focal injury, such as diffuse axonal injury (DAI) , also exhibit the impairments. However, in previous studies, the numbers of stimuli have been limited in the task and performance was assessed only by photographs of faces expressing apparent emotions. In the present study, young patients with DAI were tested for the ability of recognition of emotion from facial expression by using a new task. The task can measure the recognition threshold of recognition using a method of experimental psychology. The intensity of each facial expression stimulus was varied from 1% to 99% according to patientʼs response.<br>  Fourteen males with DAI and age matched 51 normal male controls participated in this study. Participants were required to classify the facial expression stimuli using linguistic labels.<br>  The threshold level was compared between DAI group and controls group. A repeated measures ANOVA revealed main effects of Stimulus and Group, respectively (p＜.05) . The result of discrimination threshold indicated that young male with DAI performed more poorly on the low intensity stimuli in comparison with age matched controls. We discuss the differences between the results of this study and previous studies based on two perspectives; one is from the point view of the characteristics of our task, and the other is the role of subcortical area on facial expression recognition process.</p>

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