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- Title
Which face represents me? The neural responses of a face transplant patient to his previous and current face.
- Authors
Gülbetekin, Evrim; Bayraktar, Seda; Özkan, Ömer; Özkan, Özlenen; Uysal, Hilmi; Çolak, Halil Ömer; Şenol, Abdullah Utku; Şavklıyıldız, Ayhan
- Abstract
Objective: To examine the neural responses of a face transplant patient (FTP) for his old and new faces. Methods: One FTP and ten male control subjects participated in the study. Previous and current facial photographs of the participants and photos of strangers were used as stimuli. Participants 'own faces (previous or current) or strange male faces were presented in the experimental sessions. The participants were asked to discriminate between their own faces and other faces. Stimuli were presented by E-Prime 3.0. After the presentation of fixation dot for 2 sec., stimuli were randomly presented for 1000ms. ITI was 2200 ms. Brain signals were recorded via 64channel EEG system. N170 amplitudes were derived from posterior electrode sites O1/O2, P7/P8, and PO7/PO8. N170 responses were determined (100-250 ms) via Brain Vision Analyzer. ERPs were averaged from 200 ms before to 1000ms after stimulus onset. Results: Repeated measures ANOVA was conducted to determine the effects of stimulus on N170 responses for each electrode site. A significant stimulus effect was found for O1 F(2, 18)=7.36, p=.005, ηp2=.45 and P7 F(2,18)=7.36, p=.033, ηp2=.31. The amplitude of P7 for previous faces (M=-9.79, SS=4.78) was higher than that for their current faces (M=- 7.5, SS=4.28) in the controls. The amplitude of O1 for previous faces (M=-9.79, SS=4.78) was also higher than that for their current faces (M=-7.5, SS=4.28). On the other hand, the N170 responses of FTP for each category (P7: previous=-22.47; current= -11.12; strange= -16.33; O1: previous= -17.38; current= -9.78; strange= -12.20) were higher than that of the controls. Descriptive statistics indicated that FTP responded to his current face like the control group; however, his responses for his previous face and other faces were higher than that of the controls. Conclusion: FTP adopted its new face as in the control group; however, his responses to his old face were different in comparison to the controls. This study is a part of the research project supported by Akdeniz University Scientific Research Projects Coordination Unit. Project Number: SBA-2019-4254.
- Subjects
FACIAL transplantation; DESCRIPTIVE statistics; CONTROL groups; UNIVERSITY research
- Publication
Anatomy: International Journal of Experimental & Clinical Anatomy, 2022, Vol 16, p264
- ISSN
1307-8798
- Publication type
Abstract
- DOI
10.2399/ana.22.003s