Specific language disorder

Specific language disorder (SLD), also known as specific language impairment (SLI) or developmental language disorder (DLD), is a neurodevelopmental condition characterized by significant difficulties in the acquisition and use of language that cannot be attributed to hearing loss, intellectual disability, neurological damage, or environmental deprivation. The disorder primarily affects the language processing systems of the brain, impacting expressive language (the ability to produce speech and form sentences), receptive language (the ability to understand spoken language), or both. Children with SLD may present with limited vocabulary, difficulty forming grammatically correct sentences, problems with word retrieval, and challenges in understanding complex instructions or narratives. The severity and specific profile of language difficulties can vary considerably among affected individuals. SLD typically becomes apparent during early childhood when language milestones are delayed or atypical compared to peers. Affected children may begin speaking later than expected and show persistent difficulties with language throughout school years, which can impact academic achievement, reading and writing skills, and social interactions. Some individuals continue to experience language challenges into adolescence and adulthood. The condition has a strong genetic component, with family studies demonstrating increased risk among first-degree relatives of affected individuals. Several genes have been implicated, including FOXP2, CNTNAP2, ATP2C2, and CMIP, though the genetic architecture is complex and likely involves multiple contributing loci. There is no cure for specific language disorder, but early identification and intervention can significantly improve outcomes. Treatment primarily involves speech and language therapy tailored to the individual's specific areas of difficulty, which may include strategies to expand vocabulary, improve grammar, enhance narrative skills, and strengthen comprehension. Educational accommodations and support within school settings are often necessary. Some children may also benefit from augmentative communication strategies during early stages. With appropriate intervention, many individuals with SLD make meaningful progress, though some degree of language difficulty may persist long-term.

Data sourced from FDA regulatory filings and ClinicalTrials.gov. Updated periodically.

Common questions about Specific language disorder