Consciousness and emotional facial expression recognition: subliminal/supraliminal stimulation effect on N200 and P300 ERPs

Abstract. In this study we analyze whether facial expression recognition is marked by specific event-related potential (ERP) correlates and whether conscious and unconscious elaboration of emotional facial stimuli are qualitatively different processes. ERPs elicited by supraliminal and subliminal (10 ms) stimuli were recorded when subjects were viewing emotional facial expressions of four emotions or neutral stimuli. Two ERP effects (N2 and P3) were analyzed in terms of their peak amplitude and latency variations. An emotional specificity was observed for the negative deflection N2, whereas P3 was not affected by the content of the stimulus (emotional or neutral). Unaware information processing proved to be quite similar to aware processing in terms of peak morphology but not of latency. A major result of this research was that unconscious stimulation produced a more delayed peak variation than conscious stimulation did. Also, a more posterior distribution of the ERP was found for N2 as a function of emot...

[1]  David C. Alsop,et al.  Brain Activation during Facial Emotion Processing , 2002, NeuroImage.

[2]  Margot J. Taylor,et al.  Early processing of the six basic facial emotional expressions. , 2003, Brain research. Cognitive brain research.

[3]  H. Shevrin,et al.  Visual Evoked Response Correlates of Unconscious Mental Processes , 1968, Science.

[4]  M S Gazzaniga,et al.  Brain mechanisms and conscious experience. , 1993, Ciba Foundation symposium.

[5]  P. Ekman.  Facial expression and emotion. , 1993, The American psychologist.

[6]  E. Bernat,et al.  Further evidence for unconscious learning: preliminary support for the conditioning of facial EMG to subliminal stimuli. , 1999, Journal of psychiatric research.

[7]  K. Henke,et al.  Subliminal Perception of Pictures in the Right Hemisphere , 1993, Consciousness and Cognition.

[8]  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.

[9]  John T. Cacioppo,et al.  Attitudes to the Right: Evaluative Processing is Associated with Lateralized Late Positive Event-Related Brain Potentials , 1996 .

[10]  H. Shevrin,et al.  Event-related markers of unconscious processes. , 2001, International journal of psychophysiology : official journal of the International Organization of Psychophysiology.

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

[12]  E. Bernat,et al.  Event-related brain potentials differentiate positive and negative mood adjectives during both supraliminal and subliminal visual processing. , 2001, International journal of psychophysiology : official journal of the International Organization of Psychophysiology.

[13]  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.

[14]  J. Rohrbaugh,et al.  Current trends in event-related potential research , 1987 .

[15]  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.

[16]  Joseph E LeDoux.  The Emotional Brain: The Mysterious Underpinnings of Emotional Life , 1996 .

[17]  M. Bradley,et al.  Fleeting images: a new look at early emotion discrimination. , 2001, Psychophysiology.

[18]  P Krolak-Salmon,et al.  Processing of facial emotional expression: spatio‐temporal data as assessed by scalp event‐related potentials , 2001, The European journal of neuroscience.

[19]  J. Haxby,et al.  The distributed human neural system for face perception , 2000, Trends in Cognitive Sciences.

[20]  A. Öhman,et al.  On the automaticity of autonomic responses in emotion: An evolutionary perspective. , 2003 .

[21]  W. J. Williams,et al.  Conscious and Unconscious Processes: Psychodynamic, Cognitive, and Neurophysiological Convergences , 1996 .

[22]  R. Howard,et al.  Fear conditioning, preparedness, and the contingent negative variation. , 1995, Psychophysiology.

[23]  H. Nordby,et al.  Event-related potential (ERP) asymmetries to emotional stimuli in a visual half-field paradigm. , 1997, Psychophysiology.

[24]  John W McCrary,et al.  Behavioral and neural analyses of connotative meaning: Word classes and rating scales , 1980, Brain and Language.

[25]  H. Jasper.  Report of the committee on methods of clinical examination in electroencephalography , 1958 .

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

[27]  N. Kanwisher,et al.  The Fusiform Face Area: A Module in Human Extrastriate Cortex Specialized for Face Perception , 1997, The Journal of Neuroscience.

[28]  Neil A. Macmillan,et al.  The psychophysics of subliminal perception , 1986, Behavioral and Brain Sciences.

[29]  R A McCarthy,et al.  Prosopagnosia and structural encoding of faces: evidence from event-related potentials. , 1999, Neuroreport.

[30]  R. Adolphs,et al.  The human amygdala in social judgment , 1998, Nature.

[31]  M Brázdil,et al.  Effect of subthreshold target stimuli on event-related potentials. , 1998, Electroencephalography and clinical neurophysiology.

[32]  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.

[33]  Cheryl L Grady,et al.  The effect of encoding strategy on the neural correlates of memory for faces , 2002, Neuropsychologia.

[34]  W. J. Williams,et al.  Conscious and nonconscious processes: an ERP index of an anticipatory response in a conditioning paradigm using visually masked stimuli. , 1994, Psychophysiology.

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

[36]  Miller Ga,et al.  Affective valence and information processing. , 1987 .

[37]  V. Johnston,et al.  Multiple P3s to emotional stimuli and their theoretical significance. , 1986, Psychophysiology.

[38]  Pavel Jurák,et al.  Intracerebral event-related potentials to subthreshold target stimuli , 2001, Clinical Neurophysiology.

[39]  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.

[40]  D Lehmann,et al.  Affective attitudes to face images associated with intracerebral EEG source location before face viewing. , 1999, Brain research. Cognitive brain research.

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

[42]  K. Scherer,et al.  Handbook of affective sciences. , 2003 .

[43]  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.

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

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

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

[47]  J. Zarranz,et al.  [Neurology and clinical neurophysiology]. , 1986, Medicina clinica.

[48]  S A Hillyard,et al.  Effects of aging on event-related brain potentials and reaction times in an auditory oddball task. , 2007, Psychophysiology.

[49]  Isabel Gauthier,et al.  Social interest and the development of cortical face specialization: what autism teaches us about face processing. , 2002, Developmental psychobiology.

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

[51]  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.