The Japanese journal of neuropsychology

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ArticleTitle	The study of facial expression recognition from facial expression discrimination threshold in patients with temporal lobe epilepsy
Language	J
AuthorList	Tomomi Arakawa¹⁾²⁾, Takahiko Mukaino³⁾, Emi Yamada⁴⁾, Taira Uehara⁴⁾, Keiko Fukui⁵⁾, Ryo Yamasaki³⁾, Junichi Kira^3)6)～8), Shinya Uchida⁹⁾
Affiliation	¹⁾Department of Speech, Language and Hearing Sciences, Graduate School of Health and Welfare Sciences, International University of Health and Welfare ²⁾Department of Medical Technology, Kyushu University Hospital ³⁾Department of Neurology, Neurological Institute, Graduate School of Medical Sciences, Kyushu University ⁴⁾Department of Clinical Neurophysiology, Graduate School of Medical Sciences, Kyushu University ⁵⁾Department of Otorhinolaryngology, Head and Neck Surgery, Kyushu University Hospital ⁶⁾Translational Neuroscience Center, Graduate School of Medicine, International University of Health and Welfare ⁷⁾Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences at Fukuoka, International University of Health and Welfare ⁸⁾Department of Neurology, Brain and Nerve Center, Fukuoka Central Hospital ⁹⁾Department of Speech and Hearing Sciences, School of Health Sciences at Narita, International University of Health and Welfare
Publication	Japanese Journal of Neuropsychology: 38 (2), 155-165, 2022
Received	Feb 22, 2021
Accepted	Apr 12, 2022
Abstract	The present study investigated the ability of facial emotion recognition in patients with temporal lobe epilepsy (TLE). Total of 12 TLE patients and 32 healthy controls were participated. Two tasks consisted of morphing movie task and static picture task were used. Emotions of happiness, anger, sadness and surprise were examined. In the morphing movie task, movies in which face was gradually morphed from neutral emotion expression to maximum emotion expression were presented to the participants, then they were asked to respond when they judged that facial emotion was changed from neutral expression. Reaction time from onset of movie presentation to response was used to calculate facial emotion discrimination threshold. In the static picture task, static image in which face with maximum facial emotion expression was presented, and participants were asked to judge type of emotion. The results showed that the facial emotion discrimination thresholds in emotions of surprise and anger were significantly higher in TLE patients compared with healthy control in the morphing task. No errors were found in the static picture task. TLE patients were able to recognize the facial expression of static image with maximum emotion expression as well as the healthy group, but showed the increase of facial emotion discrimination threshold. The morphing movie task could be detectable increase of facial emotion discrimination threshold in TLE patients.
Keywords	temporal lobe epilepsy, facial emotion recognition, morphing movie task, facial emotion discrimination threshold