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Results for “FACIAL EXPRESSION”

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PubMed2002

Selective disruption of the recognition of facial expressions of anger.

Appetitive aggression occurs in the context of resource/dominance disputes in a wide variety of species. Hence, the possibility arises that a specific neural system may have evolved to detect and coordinate responses to this specific form of challenge or threat. The dopamine system has been implicated in the processing of signals of aggression in social-agonistic encounters in several species. Here we report that dopaminergic antagonism in healthy male volunteers, following acute administration of the dopamine D2-class receptor antagonist sulpiride, leads to a selective disruption in the recognition of facial expressions of anger (signals of appetitive aggression in humans), but leaves intact recognition of other emotions and the matching of unfamiliar faces.

Adult↗
PubMed1987

The relation between low facial expressivity during emotional arousal and somatic symptoms.

Differential emotions theory has suggested that suppressed emotion, and specifically suppressed facial signs of emotion, might be aetiologically associated with illness, and moreover, that suppression of different classes of emotion might be related to differential symptom formation. This study examined the relationship between degree of facial emotional expressivity under conditions of emotional arousal and the presence and extent of various self-reported physical symptoms. Twenty-three adult women underwent emotion induction procedures and were videotaped while they described their emotional reactions. Judges viewed the videotapes of subjects' facial behaviour and rated the degree of expressivity during the sadness, fear, and anger inductions. Correlational statistics indicated that physical symptoms were almost exclusively negatively correlated with emotion expression. There was also some evidence of an emotion-specific/symptom-specific configuration. Although causal inferences about emotion-symptom linkages are unwarranted at this time, the study provides some support for theoretical formulations about the relationship between physical symptoms and emotion and suggests a methodology with which to pursue this line of research.

Adolescent↗
PubMed2001

Parietal electroencephalogram beta asymmetry and selective attention to angry facial expressions in healthy human subjects.

Research on cerebral affective processing in humans has concentrated on the lateralization of the prefrontal cortex. However, the parietal cortex also seems to play a role in motivation and emotion. In the present study the lateralized role of the parietal cortex in motivated attention was investigated, using an electrophysiological correlate of brain activity (electroencephalogram (EEG)) and a modified Dot probe task, which indexes selective, i.e. avoidant or vigilant attention for angry faces in a spatial display. Twenty-two participants underwent an EEG baseline recording from the F3, F4, P3 and P4 electrode positions, which was followed by the modified Dot probe task. Spectral power in 1 Hz frequency bins were derived for each electrode site and transformed to power density values in the 8-12 Hz (alpha) and 13-30 Hz (beta) frequency range. Log-transformed prefrontal and parietal asymmetries and bias scores for selective attention to angry and happy faces were calculated. Results showed a highly significant relationship between the asymmetry in parietal EEG beta activity and the attentional response to the angry face. Relative more right-sided parietal EEG activity in the beta frequency domain was predictive of a more avoidant response to angry facial expression. This finding suggests that asymmetrical parietal beta activity might be linked to the behavioural dimensions of approach and withdrawal.

Adult↗
PubMed2001

Making faces: creating three-dimensional parameterized models of facial expression.

Previous studies of the perceptual processing and dynamics of emotional expression in faces have been limited by the lack of realistic yet controlled stimuli. The present work offers researchers a method for creating such stimuli for exploring these phenomena. We describe the creation of the stimuli and a series of experiments testing the validity of these stimuli with respect to emotional expressions in humans. Participants evaluated synthesized facial images and standardized photographs of six basic emotional expressions for intensity and accuracy of perceived emotion. Comparisons of these measures were qualitatively similar for synthesized and photographed faces. A manipulation of the magnitude of the synthesized expressions yielded a significant effect on the perceived intensity of expression. In a subsequent multidimensional scaling study, no systematic differences were uncovered in the derived configurations of the synthesized expressions and the photographs. These results are discussed in the context of possible future research applications.

Emotions↗
PubMed2006

Orienting and maintenance of gaze to facial expressions in social anxiety.

In 2 experiments, the authors tested predictions from cognitive models of social anxiety regarding attentional biases for social and nonsocial cues by monitoring eye movements to pictures of faces and objects in high social anxiety (HSA) and low social anxiety (LSA) individuals. Under no-stress conditions (Experiment 1), HSA individuals initially directed their gaze toward neutral faces, relative to objects, more often than did LSA participants. However, under social-evaluative stress (Experiment 2), HSA individuals showed reduced biases in initial orienting and maintenance of gaze on faces (cf. objects) compared with the LSA group. HSA individuals were also relatively quicker to look at emotional faces than neutral faces but looked at emotional faces for less time, compared with LSA individuals, consistent with a vigilant-avoidant pattern of bias.

Adult↗