Temporal dynamics of facial identity and expression recognition in a developmental prosopagnosic

Stephanie Bastidas, Ann M. Hu, Lauren Hill, Jason S. Nomi, Lucy J. Troup

Research output: Contribution to conferencePoster

Abstract

Facial recognition and expression recognition are encoded by distinct pathways (Haxby, Hoffman, & Gobbini, 2000). Individuals with prosopagnosia present impaired identity recognition with preserved expression recognition, supporting this view. EEG studies have found diminished amplitude of the N170 component for faces in individuals with prosopagnosia. The effect of facial expression on the face-specific N170 is still unclear, but the late positive potential (LPP) at 300ms after stimulus onset is likely to be modulated by type of emotion and emotion processing. This study aimed to confirm that participant TM – a female with developmental prosopagnosia – demonstrated a marked decrease in the N170 and to acquire the first ERPs related to emotional expression processing in an individual with prosopagnosia. Compared to 11 control participants (4 age-matched), TM presented impaired identity recognition (scores 2 standard deviations (SD) below age-matched controls) and gender discrimination (scores 4 SDs below age-matched controls). TM showed intact emotion and object recognition and emotional expression discrimination (scores <1 SD above controls). On a faces vs. houses comparison of ERPs, TM showed a smaller N170 at temporal and occipital electrodes to faces than controls, and a smaller difference between the two conditions. On a comparison of implicit (gender discrimination) vs. explicit (emotion discrimination) emotional processing task, TM’s late positive potential was not modulated by emotion or condition, an effect that controls did show. These results further support the dissociation not only between identity and emotion recognition but also gender discrimination, reflected both in behavioral measures and in ERP components.
Original languageEnglish
Pages98-99
Number of pages2
Publication statusPublished - 13 Apr 2013
Externally publishedYes
EventCognitive Neuroscience Society Annual Meeting 2013 - San Francisco, United States
Duration: 13 Apr 201316 Apr 2013
http://www.cogneurosociety.org/wordpress2015/wp-content/uploads/2013/04/CNS2013_Program.pdf

Conference

ConferenceCognitive Neuroscience Society Annual Meeting 2013
CountryUnited States
CitySan Francisco
Period13/04/1316/04/13
Internet address

Fingerprint

Facial Expression
Prosopagnosia
Emotions
Recognition (Psychology)
Electrodes
Discrimination (Psychology)
Facial Recognition

Cite this

Bastidas, S., Hu, A. M., Hill, L., Nomi, J. S., & Troup, L. J. (2013). Temporal dynamics of facial identity and expression recognition in a developmental prosopagnosic. 98-99. Poster session presented at Cognitive Neuroscience Society Annual Meeting 2013, San Francisco, United States.
Bastidas, Stephanie ; Hu, Ann M. ; Hill, Lauren ; Nomi, Jason S. ; Troup, Lucy J. / Temporal dynamics of facial identity and expression recognition in a developmental prosopagnosic. Poster session presented at Cognitive Neuroscience Society Annual Meeting 2013, San Francisco, United States.2 p.
@conference{3e9cae102a4a4c9cb2fc4af609107543,
title = "Temporal dynamics of facial identity and expression recognition in a developmental prosopagnosic",
abstract = "Facial recognition and expression recognition are encoded by distinct pathways (Haxby, Hoffman, & Gobbini, 2000). Individuals with prosopagnosia present impaired identity recognition with preserved expression recognition, supporting this view. EEG studies have found diminished amplitude of the N170 component for faces in individuals with prosopagnosia. The effect of facial expression on the face-specific N170 is still unclear, but the late positive potential (LPP) at 300ms after stimulus onset is likely to be modulated by type of emotion and emotion processing. This study aimed to confirm that participant TM – a female with developmental prosopagnosia – demonstrated a marked decrease in the N170 and to acquire the first ERPs related to emotional expression processing in an individual with prosopagnosia. Compared to 11 control participants (4 age-matched), TM presented impaired identity recognition (scores 2 standard deviations (SD) below age-matched controls) and gender discrimination (scores 4 SDs below age-matched controls). TM showed intact emotion and object recognition and emotional expression discrimination (scores <1 SD above controls). On a faces vs. houses comparison of ERPs, TM showed a smaller N170 at temporal and occipital electrodes to faces than controls, and a smaller difference between the two conditions. On a comparison of implicit (gender discrimination) vs. explicit (emotion discrimination) emotional processing task, TM’s late positive potential was not modulated by emotion or condition, an effect that controls did show. These results further support the dissociation not only between identity and emotion recognition but also gender discrimination, reflected both in behavioral measures and in ERP components.",
author = "Stephanie Bastidas and Hu, {Ann M.} and Lauren Hill and Nomi, {Jason S.} and Troup, {Lucy J.}",
year = "2013",
month = "4",
day = "13",
language = "English",
pages = "98--99",
note = "Cognitive Neuroscience Society Annual Meeting 2013 ; Conference date: 13-04-2013 Through 16-04-2013",
url = "http://www.cogneurosociety.org/wordpress2015/wp-content/uploads/2013/04/CNS2013_Program.pdf",

}

Bastidas, S, Hu, AM, Hill, L, Nomi, JS & Troup, LJ 2013, 'Temporal dynamics of facial identity and expression recognition in a developmental prosopagnosic' Cognitive Neuroscience Society Annual Meeting 2013, San Francisco, United States, 13/04/13 - 16/04/13, pp. 98-99.

Temporal dynamics of facial identity and expression recognition in a developmental prosopagnosic. / Bastidas, Stephanie; Hu, Ann M.; Hill, Lauren ; Nomi, Jason S.; Troup, Lucy J.

2013. 98-99 Poster session presented at Cognitive Neuroscience Society Annual Meeting 2013, San Francisco, United States.

Research output: Contribution to conferencePoster

TY - CONF

T1 - Temporal dynamics of facial identity and expression recognition in a developmental prosopagnosic

AU - Bastidas, Stephanie

AU - Hu, Ann M.

AU - Hill, Lauren

AU - Nomi, Jason S.

AU - Troup, Lucy J.

PY - 2013/4/13

Y1 - 2013/4/13

N2 - Facial recognition and expression recognition are encoded by distinct pathways (Haxby, Hoffman, & Gobbini, 2000). Individuals with prosopagnosia present impaired identity recognition with preserved expression recognition, supporting this view. EEG studies have found diminished amplitude of the N170 component for faces in individuals with prosopagnosia. The effect of facial expression on the face-specific N170 is still unclear, but the late positive potential (LPP) at 300ms after stimulus onset is likely to be modulated by type of emotion and emotion processing. This study aimed to confirm that participant TM – a female with developmental prosopagnosia – demonstrated a marked decrease in the N170 and to acquire the first ERPs related to emotional expression processing in an individual with prosopagnosia. Compared to 11 control participants (4 age-matched), TM presented impaired identity recognition (scores 2 standard deviations (SD) below age-matched controls) and gender discrimination (scores 4 SDs below age-matched controls). TM showed intact emotion and object recognition and emotional expression discrimination (scores <1 SD above controls). On a faces vs. houses comparison of ERPs, TM showed a smaller N170 at temporal and occipital electrodes to faces than controls, and a smaller difference between the two conditions. On a comparison of implicit (gender discrimination) vs. explicit (emotion discrimination) emotional processing task, TM’s late positive potential was not modulated by emotion or condition, an effect that controls did show. These results further support the dissociation not only between identity and emotion recognition but also gender discrimination, reflected both in behavioral measures and in ERP components.

AB - Facial recognition and expression recognition are encoded by distinct pathways (Haxby, Hoffman, & Gobbini, 2000). Individuals with prosopagnosia present impaired identity recognition with preserved expression recognition, supporting this view. EEG studies have found diminished amplitude of the N170 component for faces in individuals with prosopagnosia. The effect of facial expression on the face-specific N170 is still unclear, but the late positive potential (LPP) at 300ms after stimulus onset is likely to be modulated by type of emotion and emotion processing. This study aimed to confirm that participant TM – a female with developmental prosopagnosia – demonstrated a marked decrease in the N170 and to acquire the first ERPs related to emotional expression processing in an individual with prosopagnosia. Compared to 11 control participants (4 age-matched), TM presented impaired identity recognition (scores 2 standard deviations (SD) below age-matched controls) and gender discrimination (scores 4 SDs below age-matched controls). TM showed intact emotion and object recognition and emotional expression discrimination (scores <1 SD above controls). On a faces vs. houses comparison of ERPs, TM showed a smaller N170 at temporal and occipital electrodes to faces than controls, and a smaller difference between the two conditions. On a comparison of implicit (gender discrimination) vs. explicit (emotion discrimination) emotional processing task, TM’s late positive potential was not modulated by emotion or condition, an effect that controls did show. These results further support the dissociation not only between identity and emotion recognition but also gender discrimination, reflected both in behavioral measures and in ERP components.

M3 - Poster

SP - 98

EP - 99

ER -

Bastidas S, Hu AM, Hill L, Nomi JS, Troup LJ. Temporal dynamics of facial identity and expression recognition in a developmental prosopagnosic. 2013. Poster session presented at Cognitive Neuroscience Society Annual Meeting 2013, San Francisco, United States.