Event-Related Potentials Related to Normal and Morphed Emotional Faces

S. Bentin and L. Y. Deouell (2000) have suggested that face recognition is achieved through a special-purpose neural mechanism, and its existence can be identified by a specific event-related potential (ERP) correlate, the N170 effect. In the present study, the authors explored the structural significance of N170 by comparing normal vs. morphed stimuli. They used a morphing procedure that allows a fine modification of some perceptual details (first-order relations). The authors also aimed to verify the independence of face identification from other cognitive mechanisms, such as comprehension of emotional facial expressions, by applying an emotion-by-emotion analysis to examine the emotional effect on N170 ERP variation. They analyzed the peak amplitude and latency variables in the temporal window of 120-180 ms. The ERP correlate showed a classic N170 ERP effect, more negative and more posteriorly distributed for morphed faces compared with normal faces. In addition, they found a lateralization effect, with a greater right-side distribution of the N170, but not directly correlated to the morphed or normal conditions. Two cognitive codes, structural and expression, are discussed, and the results are compared with the multilevel model proposed by V. Bruce and A. W. Young (1986, 1998).

[1]  R. Dolan,et al.  Common effects of emotional valence, arousal and attention on neural activation during visual processing of pictures , 1999, Neuropsychologia.

[2]  M. Eimer.  Event-related brain potentials distinguish processing stages involved in face perception and recognition , 2000, Clinical Neurophysiology.

[3]  L. Deouell,et al.  STRUCTURAL ENCODING AND IDENTIFICATION IN FACE PROCESSING: ERP EVIDENCE FOR SEPARATE MECHANISMS , 2000, Cognitive neuropsychology.

[4]  E I Olivares,et al.  Searching for face-specific long latency ERPs: a topographic study of effects associated with mismatching features. , 1999, Brain research. Cognitive brain research.

[5]  R. Ihl,et al.  Electrophysiological correlates of emotional and structural face processing in humans , 2000, Neuroscience Letters.

[6]  A. Young,et al.  A theoretical perspective for understanding face recognition , 1998 .

[7]  M. Kutas,et al.  Neurophysiological evidence for visual perceptual categorization of words and faces within 150 ms. , 1998, Psychophysiology.

[8]  A. Young,et al.  Face and Mind , 1998 .

[9]  Kara D. Federmeier,et al.  Electrophysiology reveals semantic memory use in language comprehension , 2000, Trends in Cognitive Sciences.

[10]  Kara D. Federmeier,et al.  Picture the difference: electrophysiological investigations of picture processing in the two cerebral hemispheres , 2002, Neuropsychologia.

[11]  V. Goffaux,et al.  Spatio-temporal localization of the face inversion effect: an event-related potentials study , 1999, Biological Psychology.

[12]  B Renault,et al.  Face versus non-face object perception and the ‘other-race’ effect: a spatio-temporal event-related potential study , 2003, Clinical Neurophysiology.

[13]  D. Perrett,et al.  Categorical Perception of Morphed Facial Expressions , 1996 .

[14]  N Kanwisher,et al.  THE COGNITIVE NEUROSCIENCE OF FACE PROCESSING: AN INTRODUCTION , 2000, Cognitive neuropsychology.

[15]  M. Eimer.  ATTENTIONAL MODULATIONS OF EVENT-RELATED BRAIN POTENTIALS SENSITIVE TO FACES , 2000, Cognitive neuropsychology.

[16]  Richard J. Davidson,et al.  The neural circuitry of emotion and affective style: prefrontal cortex and amygdala contributions , 2001 .

[17]  N. Logothetis,et al.  IS FACE RECOGNITION NOT SO UNIQUE AFTER ALL? , 2000, Cognitive neuropsychology.

[18]  Hervé Abdi,et al.  Processing Faces and Facial Expressions , 2003, Neuropsychology Review.

[19]  M. Balconi,et al.  ERPs (event-related potentials), semantic attribution, and facial expression of emotions , 2003 .

[20]  G. Winocur,et al.  What Is Special about Face Recognition? Nineteen Experiments on a Person with Visual Object Agnosia and Dyslexia but Normal Face Recognition , 1997, Journal of Cognitive Neuroscience.

[21]  A. Young,et al.  Understanding face recognition. , 1986, British journal of psychology.

[22]  E. Halgren,et al.  Human brain potentials related to the emotional expression, repetition, and gender of faces , 1998, Psychobiology.

[23]  P. Ekman.  Pictures of Facial Affect , 1976 .

[24]  C. Darwin,et al.  The Expression of the Emotions in Man and Animals , 1872 .

[25]  V. Bruce,et al.  The Quarterly Journal of Experimental Psychology Section A: Human Experimental Psychology When Inverted Faces Are Recognized: the Role of Configural Information in Face Recognition , 2022 .

[26]  T. Allison,et al.  Face recognition in human extrastriate cortex. , 1994, Journal of neurophysiology.

[27]  L Carretié,et al.  An ERP study on the specificity of facial expression processing. , 1995, International journal of psychophysiology : official journal of the International Organization of Psychophysiology.

[28]  D. Maurer,et al.  The many faces of configural processing , 2002, Trends in Cognitive Sciences.

[29]  M. Eimer,et al.  The processing of emotional facial expression is gated by spatial attention: evidence from event-related brain potentials. , 2003, Brain research. Cognitive brain research.

[30]  Michela Balconi,et al.  Face-selective processing and the effect of pleasant and unpleasant emotional expressions on ERP correlates. , 2003, International journal of psychophysiology : official journal of the International Organization of Psychophysiology.

[31]  M. Eimer.  Effects of face inversion on the structural encoding and recognition of faces. Evidence from event-related brain potentials. , 2000, Brain research. Cognitive brain research.

[32]  T. Allison,et al.  Electrophysiological studies of human face perception. III: Effects of top-down processing on face-specific potentials. , 1999, Cerebral cortex.

[33]  L. Deouell,et al.  Cognitive Neuroscience: Selective visual streaming in face recognition: evidence from developmental prosopagnosia , 1999 .

[34]  Sakiko Yoshikawa,et al.  Emotional expression boosts early visual processing of the face: ERP recording and its decomposition by independent component analysis , 2001, Neuroreport.

[35]  Andreas J Fallgatter,et al.  Face-specific event-related potential in humans is independent from facial expression. , 2002, International journal of psychophysiology : official journal of the International Organization of Psychophysiology.

[36]  S. Geisser,et al.  On methods in the analysis of profile data , 1959 .

[37]  C. Dunnett.  A Multiple Comparison Procedure for Comparing Several Treatments with a Control , 1955 .

[38]  H. Jasper,et al.  The ten-twenty electrode system of the International Federation. The International Federation of Clinical Neurophysiology. , 1999, Electroencephalography and clinical neurophysiology. Supplement.

[39]  B Renault,et al.  Event-related potentials to structural familiar face incongruity processing. , 1999, Psychophysiology.

[40]  M. Tarr,et al.  The N170 occipito‐temporal component is delayed and enhanced to inverted faces but not to inverted objects: an electrophysiological account of face‐specific processes in the human brain , 2000, Neuroreport.

[41]  J. T. Marsh,et al.  Judgments of emotion in words and faces: ERP correlates. , 1987, International journal of psychophysiology : official journal of the International Organization of Psychophysiology.