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Right hemisphere learning disability associated with left hemisphere dysfunction: anomalous dominance and development

T A Sandson1, D S Manoach, B H Price

  • 1Behavioural Neurology Unit, Beth Israel Hospital, Boston, MA 02215.

Journal of Neurology, Neurosurgery, and Psychiatry
|September 1, 1994
PubMed
Summary
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This study presents two cases of social emotional processing disorder linked to left hemisphere dysfunction, challenging the typical association with the right hemisphere. Findings suggest early left-brain injury may cause functional reorganization, impacting social skills while preserving language and motor abilities.

Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Neurology

Background:

  • Social emotional processing disorder (SEPD) is typically associated with right hemisphere dysfunction.
  • Understanding the neurodevelopmental basis of SEPD is crucial for effective intervention.

Observation:

  • Two left-handed patients presented with SEPD.
  • Neurological examinations, EEG, and neuroimaging consistently indicated left hemisphere dysfunction in both patients.
  • Anomalous dominance for language was suggested by findings.

Findings:

  • The observed left hemisphere dysfunction in SEPD cases challenges conventional etiological models.
  • Early left hemisphere injury may lead to functional reorganization.
  • This reorganization appears to spare language and motor skills but may impair social-emotional processing development.

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Implications:

  • These findings suggest a broader spectrum of neurodevelopmental underpinnings for SEPD.
  • Reconsidering the role of the left hemisphere in SEPD may refine diagnostic and therapeutic approaches.
  • Further research into functional reorganization following early brain injury is warranted.