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Genetics in disorders of language.

J W Gilger1

  • 1University of Arkansas for Medical Sciences, North Little Rock 72114-1706.

Clinics in Communication Disorders
|January 1, 1992
PubMed
Summary

Research on the genetics of Developmental Language Disorder (DLD) is limited by methodological weaknesses. Future studies aim to address these, but current findings suggest genetic factors influence brain development, with environmental factors and genetic heterogeneity playing roles in DLD.

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Area of Science:

  • Genetics
  • Developmental Neuroscience
  • Linguistics

Background:

  • Early research on the genetics of Developmental Language Disorder (DLD) has limitations due to heterogeneous samples, broad phenotypes, and reliance on survey data.
  • Despite limitations, current research offers insights into the genetic underpinnings of DLD and its developmental trajectory.

Purpose of the Study:

  • To review the current state of research on the genetics of DLD.
  • To identify limitations in existing studies and suggest directions for future research.
  • To synthesize existing knowledge regarding genetic influences on DLD, including pathways, environmental modifications, and heterogeneity.

Main Methods:

  • Review of existing scientific literature on DLD genetics.
  • Analysis of methodological weaknesses in previous studies.
  • Synthesis of findings related to gene-environment interactions and genetic heterogeneity.

Main Results:

  • Genetic factors likely impact early brain structural development, contributing to DLD.
  • Environmental factors and developmental events can modify the expression and severity of DLD.
  • Evidence suggests genetic heterogeneity in DLD, with potential for multiple genetic forms and variable gene expression.

Conclusions:

  • Clinicians should consider genetic influences and family history when assessing DLD.
  • Future research must address methodological limitations to advance understanding of DLD genetics.
  • DLD is a complex disorder influenced by a combination of genetic predispositions, environmental factors, and developmental processes.

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