Impaired processing of facial happiness, with or without awareness, in developmental prosopagnosia
Developmental prosopagnosia (DP) is associated with severe, lifelong deficits in face recognition, with such cases often cited as support for a dissociation between the processing of facial identity and emotion. Here we examine the evidence against this dissociation and propose that the processing o...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2017
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| Online Access: | https://hdl.handle.net/10356/86314 http://hdl.handle.net/10220/44010 |
| _version_ | 1811690886995640320 |
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| author | Burns, Edwin James Martin, Joel Chan, Alice Hiu Dan Xu, Hong |
| author2 | School of Humanities and Social Sciences |
| author_facet | School of Humanities and Social Sciences Burns, Edwin James Martin, Joel Chan, Alice Hiu Dan Xu, Hong |
| author_sort | Burns, Edwin James |
| collection | NTU |
| description | Developmental prosopagnosia (DP) is associated with severe, lifelong deficits in face recognition, with such cases often cited as support for a dissociation between the processing of facial identity and emotion. Here we examine the evidence against this dissociation and propose that the processing of facial happiness, either with or without awareness, is actually integrated within the same neural network involved in facial identity recognition. We also test this hypothesis on a group of DP cases and neurotypical controls (NT) by adapting them to expressionless neutral faces, intact happy faces and hybrid faces. Despite these hybrid faces being explicitly identified as expressionless due to their higher spatial frequencies taken from a neutral face, their low spatial frequencies convey happy facial expressions that participants are unaware of. After adaptation, participants were asked to judge the facial expressions of face stimuli that were morphed incrementally in varying degrees of sad through to happy. Both groups exhibited emotion adaptation aftereffects to the intact happy faces, although this effect was smaller in DP. Whereas NT produced emotion adaptation aftereffects without awareness of the happy emotion in the hybrid faces; as a group, those with DP did not. Furthermore, our DP cases also exhibited deficits in judging the emotion of the happiest morphed test faces. Our results indicate that the processing of happy facial expressions, with or without awareness, is likely integrated within the face recognition network. We hypothesise that the previously identified abnormalities in the fusiform gyrus in those with DP is the most likely structure responsible for these deficits. |
| first_indexed | 2024-10-01T06:11:08Z |
| format | Journal Article |
| id | ntu-10356/86314 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:11:08Z |
| publishDate | 2017 |
| record_format | dspace |
| spelling | ntu-10356/863142020-03-07T12:10:38Z Impaired processing of facial happiness, with or without awareness, in developmental prosopagnosia Burns, Edwin James Martin, Joel Chan, Alice Hiu Dan Xu, Hong School of Humanities and Social Sciences Emotion Happy Developmental prosopagnosia (DP) is associated with severe, lifelong deficits in face recognition, with such cases often cited as support for a dissociation between the processing of facial identity and emotion. Here we examine the evidence against this dissociation and propose that the processing of facial happiness, either with or without awareness, is actually integrated within the same neural network involved in facial identity recognition. We also test this hypothesis on a group of DP cases and neurotypical controls (NT) by adapting them to expressionless neutral faces, intact happy faces and hybrid faces. Despite these hybrid faces being explicitly identified as expressionless due to their higher spatial frequencies taken from a neutral face, their low spatial frequencies convey happy facial expressions that participants are unaware of. After adaptation, participants were asked to judge the facial expressions of face stimuli that were morphed incrementally in varying degrees of sad through to happy. Both groups exhibited emotion adaptation aftereffects to the intact happy faces, although this effect was smaller in DP. Whereas NT produced emotion adaptation aftereffects without awareness of the happy emotion in the hybrid faces; as a group, those with DP did not. Furthermore, our DP cases also exhibited deficits in judging the emotion of the happiest morphed test faces. Our results indicate that the processing of happy facial expressions, with or without awareness, is likely integrated within the face recognition network. We hypothesise that the previously identified abnormalities in the fusiform gyrus in those with DP is the most likely structure responsible for these deficits. MOE (Min. of Education, S’pore) Accepted version 2017-11-08T05:48:42Z 2019-12-06T16:20:14Z 2017-11-08T05:48:42Z 2019-12-06T16:20:14Z 2017 Journal Article Burns, E. J., Martin, J., Chan, A. H. D., & Xu, H. (2017). Impaired processing of facial happiness, with or without awareness, in developmental prosopagnosia. Neuropsychologia, 102, 217-228. 0028-3932 https://hdl.handle.net/10356/86314 http://hdl.handle.net/10220/44010 10.1016/j.neuropsychologia.2017.06.020 en Neuropsychologia © 2017 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by Neuropsychologia, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1016/j.neuropsychologia.2017.06.020]. 46 p. application/pdf |
| spellingShingle | Emotion Happy Burns, Edwin James Martin, Joel Chan, Alice Hiu Dan Xu, Hong Impaired processing of facial happiness, with or without awareness, in developmental prosopagnosia |
| title | Impaired processing of facial happiness, with or without awareness, in developmental prosopagnosia |
| title_full | Impaired processing of facial happiness, with or without awareness, in developmental prosopagnosia |
| title_fullStr | Impaired processing of facial happiness, with or without awareness, in developmental prosopagnosia |
| title_full_unstemmed | Impaired processing of facial happiness, with or without awareness, in developmental prosopagnosia |
| title_short | Impaired processing of facial happiness, with or without awareness, in developmental prosopagnosia |
| title_sort | impaired processing of facial happiness with or without awareness in developmental prosopagnosia |
| topic | Emotion Happy |
| url | https://hdl.handle.net/10356/86314 http://hdl.handle.net/10220/44010 |
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