A differential neural response in the human amygdala to fearful and happy facial expressions
J. S. Morris,Chris D. Frith,David I. Perrett,Duncan Rowland,Andrew W. Young,Andrew J. Calder,Raymond J. Dolan +6 more
TLDR
Direct in vivo evidence of a differential neural response in the human amygdala to facial expressions of fear and happiness is reported, providing direct evidence that the humangdala is engaged in processing the emotional salience of faces, with a specificity of response to fearful facial expressions.Abstract:
The amygdala is thought to play a crucial role in emotional and social behaviour. Animal studies implicate the amygdala in both fear conditioning and face perception. In humans, lesions of the amygdala can lead to selective deficits in the recognition of fearful facial expressions and impaired fear conditioning, and direct electrical stimulation evokes fearful emotional responses. Here we report direct in vivo evidence of a differential neural response in the human amygdala to facial expressions of fear and happiness. Positron-emission tomography (PET) measures of neural activity were acquired while subjects viewed photographs of fearful or happy faces, varying systematically in emotional intensity. The neuronal response in the left amygdala was significantly greater to fearful as opposed to happy expressions. Furthermore, this response showed a significant interaction with the intensity of emotion (increasing with increasing fearfulness, decreasing with increasing happiness). The findings provide direct evidence that the human amygdala is engaged in processing the emotional salience of faces, with a specificity of response to fearful facial expressions.read more
Citations
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Deafness to fear in boys with psychopathic tendencies.
TL;DR: Boys with psychopathic tendencies presented with a selective impairment for the recognition of fearful vocal affect, interpreted with reference to amygdala dysfunction and components of the Integrated Emotion Systems model.
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Recognition of emotion from facial expression following traumatic brain injury.
V. Croker,Skye McDonald +1 more
TL;DR: People with TBI were found to be significantly impaired on expression labelling and matching, but experienced some improvement when provided with context, and negative emotions were particularly affected.
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Amygdala responses to nonlinguistic emotional vocalizations.
TL;DR: Findings suggest that the generally accepted involvement of the amygdala in the perception of emotional visual stimuli, such as facial expressions, also applies to stimuli within the auditory modality.
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Explicit identification and implicit recognition of facial emotions: I. Age effects in males and females across 10 decades.
Leanne M. Williams,Danielle Mathersul,Donna M. Palmer,Ruben C. Gur,Raquel E. Gur,Evian Gordon +5 more
TL;DR: The lifespan trends in emotion processing over 10 decades point to an interaction of brain-based (maturation, stability, and then atrophy of cortical and subcortical systems) and experiential contributing factors and provide a robust normative platform for assessing clinical groups.
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Facial expression and selective attention
TL;DR: These findings suggest that discrimination of emotional cues in faces can at least partly be extracted at preattentive or unconscious stages of processing, and then serve to enhance awareness and behavioural responses toward emotionally relevant stimuli.
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TL;DR: Findings suggest the human amygdala may be indispensable to recognize fear in facial expressions, but is not required to recognize personal identity from faces, and constrains the broad notion that the amygdala is involved in emotion.