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Related Experiment Videos

SPECT findings in children with specific language impairment.

Marianne Ors1, Erik Ryding, Magnus Lindgren

  • 1Division of Clinical Neurophysiology, Department of Clinical Neuroscience, Lund University Hospital, Sweden. marianne.ors@skane.se

Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
|May 6, 2005
PubMed
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Children with specific language impairment (SLI) exhibit distinct brain blood flow patterns, particularly in the right parietal and subcortical regions, compared to those with attention-deficit hyperactivity disorder (ADHD). This suggests neurodevelopmental differences contribute to SLI.

Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Pediatrics

Background:

  • Specific Language Impairment (SLI) is a developmental disorder affecting language acquisition.
  • Attention-Deficit Hyperactivity Disorder (ADHD) is a common neurodevelopmental disorder.
  • Cerebral blood flow (CBF) patterns are increasingly recognized as indicators of brain function and development.

Purpose of the Study:

  • To compare regional cerebral blood flow (CBF) patterns in children with SLI and ADHD.
  • To investigate potential neurodevelopmental differences underlying SLI and ADHD.
  • To explore the role of both cortical and subcortical regions in SLI.

Main Methods:

  • 99mTc-HMPAO SPECT imaging was used to measure resting-state CBF in school-aged children.

Related Experiment Videos

  • The study included 19 children diagnosed with SLI and 12 children diagnosed with ADHD.
  • Regional CBF distributions were analyzed and compared between the two groups.

    • Main Results:

    • Significant differences in CBF distribution were observed between the SLI and ADHD groups.
    • Children with SLI showed lower CBF in the right parietal and subcortical regions compared to the ADHD group.
    • The SLI group exhibited symmetric temporal lobe CBF, while the ADHD group displayed typical left-sided predominance.

    Conclusions:

    • Findings support the hypothesis of anomalous neurodevelopment and deviant hemispheric lateralization in the etiology of SLI.
    • Subcortical structures play a significant role in childhood language impairment, warranting inclusion in future research.
    • This study highlights the need to broaden the focus of SLI research beyond cortical structures to encompass subcortical regions.