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Dynamic Clamp Methods to Investigate Impaired Neuronal Excitability Associated with Autism

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Published on: October 17, 2025

Early Vocal Development in Tuberous Sclerosis Complex Predicts Language but Not Autism Outcomes.

Tanjala T Gipson¹, Edina R Bene², Ching-Chi Yang³

¹Department of Pediatrics, University of Tennessee Health Sciences Center, The Boling Center for Developmental Disabilities and Le Bonheur Children's Hospital, Memphis, Tennessee.

Pediatric Neurology

|March 5, 2026

Summary

This summary is machine-generated.

Early language impairment in tuberous sclerosis complex (TSC) can be predicted using the canonical babbling ratio (CBR) in infants. This vocal measure may aid in earlier identification of language difficulties in children with TSC.

Keywords:

Autism Canonical babbling Early speech and language Infant vocalizations Tuberous sclerosis complex Volubility

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Area of Science:

Pediatric neurology
Developmental pediatrics
Speech and language pathology

Background:

Language impairments affect a significant majority of individuals with tuberous sclerosis complex (TSC), often leading to delayed evaluations.
Infant vocal behavior, specifically the canonical babbling ratio (CBR) and volubility, are key indicators of early language development.
Previous research indicated low CBR and volubility in infants with TSC, necessitating further investigation.

Purpose of the Study:

To further characterize canonical babbling ratio (CBR) and volubility in infants with TSC.
To assess the predictive power of CBR and volubility for autism spectrum disorder (ASD) and language outcomes in TSC.
To determine if CBR's predictive contribution is independent of other known language predictors.

Main Methods:

Analysis of 202 infant recordings at 12 months of age from individuals with TSC.
Utilized linear regression to predict language outcomes based on vocal measures.
Employed stepwise multiple regression and logistic regression to evaluate predictive capabilities for language and ASD, respectively.

Main Results:

Infants with TSC exhibited lower CBR and volubility compared to typically developing infants.
CBR significantly predicted language outcomes at 24 months in infants with TSC, outperforming other known predictors.
Neither CBR nor volubility demonstrated predictive capability for autism spectrum disorder (ASD) in this cohort.

Conclusions:

The canonical babbling ratio (CBR) shows potential as a valuable tool for the early identification of language impairments in infants with TSC.
Early vocal assessments may facilitate timely interventions for language development in this population.