Frequency Following Responses in childhood apraxia of speech

Int J Pediatr Otorhinolaryngol. 2021 Jun:145:110742. doi: 10.1016/j.ijporl.2021.110742. Epub 2021 Apr 28.


Objective: to compare the Frequency Following Responses of children with childhood apraxia of speech with typical development children.

Method: this is an observational cross-sectional analytical study approved by Human Research Ethics Committee. Thirty normal hearing children have participated in the study.

They were divided into two groups: 1) study group - composed by 15 children diagnosed with childhood apraxia of speech (between the chronological ages of 3 and 11 years, mean age of 5,7 years); and 2) control group: composed by 15 children with typical development, paired by age and gender with study group. Frequency Following Response were recorded using the/da/syllable presentation rate at 10.9 ms.

Results: there was a significant delay in latencies of waves V, A and C of children with apraxia of speech, suggesting difficulties in the ability to process sounds.

Conclusion: The delay on Frequency Following Response's latencies (waves V, A and C) in children with apraxia of speech maybe related to atypical neural coding of speech sounds, suggesting that apraxia of speech must not be purely considered as a motor speech disorder.

Keywords: Apraxia; Frequency following response; Speech discrimination; Speech-evoked auditory brainstem response.

Publication types

  • Observational Study

MeSH terms

  • Apraxias* / diagnosis
  • Apraxias* / epidemiology
  • Child
  • Child, Preschool
  • Cross-Sectional Studies
  • Evoked Potentials, Auditory, Brain Stem
  • Humans
  • Phonetics
  • Speech
  • Speech Disorders / diagnosis
  • Speech Disorders / epidemiology
  • Speech Perception*