Edorium Journal of

Psychology

 
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Original Article
 
Face and emotional expression processing and event-related potentials in a case study of impaired face perception
Lucy J. Troup1, Stephanie Bastidas2, Jason S. Nomi3, Maia T. Nguyen2, Tien Tong4
1PhD, Colorado State University, Department of Psychology, Colorado State University, Fort Collins, CO, United States.
2MS, Colorado State University, Department of Psychology, Colorado State University, Fort Collins, CO, United States.
3PhD, University of Miami, Department of Psychology, University of Miami, Miami, Florida, United States.
4BSc, Colorado State University, Department of Psychology, Colorado State University, Fort Collins, CO, United States.

Article ID: 100002P13LT2015
doi:10.5348/P13-2015-2-OA-2

Address correspondence to:
Lucy Jane Troup
Department of Psychology, Colorado State University
Fort Collins, Colorado
United States 80523-1876
Phone: 1 970 491 6820

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How to cite this article
Troup LJ, Bastidas S, Nomi JS, Nguyen MT, Tong T. Face and emotional expression processing and event-related potentials in a case study of impaired face perception. Edorium J Psychol 2015;1:9–17.


Abstract
Aims: To evaluate face and emotional expression recognition in a single participant event related potential (ERP) case study.
Methods: We compared an individual with impaired face perception (participant G.O.) to 29 normal controls in behavioral tests of object, face and expression recognition and also recorded Event-Related Potentials (ERPs) in response to houses, faces and faces with emotional expressions.
Results: Participant G.O. performed normally on behavioral tests of object and emotional expression recognition but was significantly impaired in tests of face recognition. Unlike controls, G.O. did not show a difference in mean amplitude of P1 to houses compared to upright faces. Additionally, G.O. presented with a marked amplitude decrease in the temporal occipital N170 in response to faces compared to controls and a decrease in N170 and P300 amplitude in response to emotional expressions compared to controls. G.O. clearly showed a unique pattern of face and emotion recognition compared to control participants.
Conclusion: The behavioral deficits were not directly reflected in the ERP responses found for G.O. and controls. However, G.O. presented a distinctive pattern of scalp electrical activity for faces, both standard and with emotion. Thus highlighting the importance of using multiple measures in the examination of face perception deficits in individuals

Keywords: Event related potentials, Face recognition impairment, Emotion

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Author Contributions:
Lucy J. Troup – Substantial contributions to conception and design, Acquisition of data, Drafting the article, Revising it critically for important intellectual content, Final approval of the version to be published
Stephanie Bastidas – Substantial contributions to conception and design, Acquisition of data, Drafting the article, Revising it critically for important intellectual content, Final approval of the version to be published
Jason S. Nomi – Substantial contributions to conception and design, Acquisition of data, Drafting the article, Revising it critically for important intellectual content, Final approval of the version to be published
Maia T. Ngyuen – Substantial contributions to conception and design, Acquisition of data, Drafting the article, Revising it critically for important intellectual content, Final approval of the version to be published
Tien Tong – Substantial contributions to conception and design, Acquisition of data, Revising it critically for important intellectual content, Final approval of the version to be published
Guarantor of submission
The corresponding author is the guarantor of submission.
Source of support
None
Conflict of interest
Authors declare no conflict of interest.
Copyright
© 2015 Lucy J. Troup et al. This article is distributed under the terms of Creative Commons Attribution License which permits unrestricted use, distribution and reproduction in any medium provided the original author(s) and original publisher are properly credited. Please see the copyright policy on the journal website for more information.



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