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Perceptual and Category Processing of the Uncanny Valley Hypothesis' Dimension of Human Likeness: Some Methodological Issues
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Double Dissociation between Overt and Covert Face Recognition.

D Tranel1, H Damasio, A R Damasio

  • 1University of Iowa College of Medicine.

Journal of Cognitive Neuroscience
|August 22, 2013
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Summary
This summary is machine-generated.

Patients with ventromedial frontal damage can recognize familiar faces but lack skin conductance responses (SCRs). This contrasts with face agnosia patients, revealing separate neural systems for stimulus recognition and emotional processing.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurology

Background:

  • Face agnosia (prosopagnosia) involves occipitotemporal damage, impairing overt face recognition but preserving covert skin conductance responses (SCRs) to familiar faces.
  • This suggests a dissociation between recognition and emotional/somatic processing in face perception.

Purpose of the Study:

  • To investigate the neural basis of emotional processing in face recognition.
  • To identify the role of ventromedial frontal cortex in generating somatic responses to familiar faces.

Main Methods:

  • Studied four patients with bilateral ventromedial frontal damage.
  • Assessed face recognition ability and skin conductance responses (SCRs) to familiar and unfamiliar faces.

Main Results:

  • Patients with ventromedial frontal damage recognized familiar faces normally.
  • These patients failed to produce discriminatory SCRs to familiar faces, unlike patients with occipitotemporal damage.
  • A double dissociation was observed between recognition and SCR discrimination based on lesion location.

Conclusions:

  • Bilateral ventromedial frontal damage impairs somatic-based emotional responses to familiar faces while preserving recognition.
  • Neural systems for processing factual information (recognition) and somatic-based valence (emotional response) are distinct and parallel.
  • This research clarifies the neural architecture underlying face perception and emotional processing.