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Early brain lesions and face-processing development.

Scania de Schonen1, Josette Mancini, Roselyne Camps

  • 1CNRS-University Paris 5 and Service of Pediatric Neurology and Metabolic Diseases, Hopital Robert Debré, CHU Xavier Bichat, Paris, France.

Developmental Psychobiology
|March 18, 2005
PubMed
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Children with early brain injuries affecting temporal regions show lasting face-processing deficits. This suggests limited brain plasticity for facial recognition compared to speech development after injury.

Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Cognitive Science

Background:

  • Functional plasticity after early brain damage offers insights into neural substrate specificity and functional development.
  • Understanding when neural substrates become functionally specific is crucial for developmental studies.

Purpose of the Study:

  • To investigate face processing development in children with unilateral brain injuries.
  • To determine the impact of pre-, peri-, or postnatal brain damage on face recognition abilities.

Main Methods:

  • Studied 5- to 17-year-old children with unilateral brain injuries (pre-, peri-, or postnatal).
  • Assessed face-processing deficits in patients with posterior injuries involving temporal regions.
  • Compared face-processing deficits between right and left hemisphere injuries.

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Main Results:

  • Patients with posterior temporal injuries exhibited persistent face-processing deficits, irrespective of age.
  • No significant differences in face-processing deficits were observed between right and left hemisphere injuries.
  • Face-processing plasticity appeared limited post-injury, contrasting with findings in speech development.

Conclusions:

  • Face processing may rely on neural substrates that are less plastic post-injury compared to speech.
  • The distinct plasticity time windows suggest different neural sensitivities for face and speech abilities.
  • Early unilateral brain injury can lead to enduring deficits in face recognition.