The Value of Electroencephalogram in Assessing Children With Speech and Language Impairments

Systad, Silje; Bjørnvold, Marit; Sørensen, Christiane; Lyster, Solveig‐Alma Halaas

doi:10.1044/2018_jslhr-l-17-0087

Cited by 5 publications

(2 citation statements)

References 62 publications

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“…The overall pooled prevalence of epileptiform activity was 27.3%. A wide variation between the prevalence estimates was, to a certain degree, explained by type of impairment such as 8.1% in speech impairments, 25.8% in language impairments, and 51.5% in language regression (11).…”

Section: Discussionmentioning

confidence: 96%

Why do we do EEG? Experience of two years from a new pediatric neurology center

Tekin¹,

DURGUT²

2022

J Exp Clin Med

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Electroencephalography (EEG) is very important for pediatric neurologists. The request reasons and results of EEGs from a newly established center were enrolled. Total of 2021 (1299 sleep + awake, 652 sleep, 70 awake) EEGs evaluated. Patients included 1005 girls and 1016 boys. 65% of the EEGs were normal and 30% was epileptic. Electroencephalography was performed due to epilepsy, fainting, first afebrile seizure, febrile seizure, speech retardation, dizziness, headache, movement disorders, gaze abnormalities, behavioral disorders, tremor, sleep disorders, tic, autism spectrum disorders, infantile spasm, encephalopathy, vision loss and abdominal pain in decreasing order. Significantly more common EEGs were performed due to tics (p:0,006), autism spectrum disorders (p:0,04) and speech retardation(p:<0,001) in boys and due to syncope (p:0,001) and dizziness(p:0,038) in girls. When EEG requests were examined by age groups, statistical significance was found. The EEG requests were parallel to the distribution of epileptic and non-epileptic events seen in that age group.

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Section: Discussionmentioning

confidence: 96%

Why do we do EEG? Experience of two years from a new pediatric neurology center

Tekin¹,

DURGUT²

2022

J Exp Clin Med

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show abstract

“…Indeed, many of the prior DLD child EEG studies concern the overlap between DLD diagnoses and epileptic seizures (e.g. Mehta et al, 2015;Shafer et al, 2001;Systad et al, 2019). The exception is a series of EEG studies with German-learning infants, which have shown that those at family risk for DLD show impaired neural ERP (event related potential) markers of language learning, such as a delayed N400 (thought to index semantic integration, Friedrich & Friederici, 2005, 2006.…”

Section: Introductionmentioning

confidence: 99%

Neural processing of rhythmic speech by children with developmental language disorder (DLD): An EEG study

Keshavarzi,

Richards,

Feltham

et al. 2024

Preprint

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Sensitivity to rhythmic and prosodic cues in speech has been described as a precursor of language acquisition. Consequently, atypical rhythmic processing during infancy and early childhood has been considered a risk factor for developmental language disorders. This is the ‘atypical rhythm risk’ (ARR) hypothesis. The neural processing of rhythmic speech has not yet been explored in children with developmental language disorder (DLD). Here we utilise EEG and a rhythmic speech paradigm previously utilised for dyslexia to investigate the ARR hypothesis in 9-year-old children with and without DLD. We investigate angular velocity, power, ERPs, phase-amplitude coupling (PAC) and phase-phase coupling (PPC), at three frequency bands, delta, theta and low gamma. Both groups demonstrated significant and equivalent phase entrainment in the delta and theta bands, but only the control children showed significant phase entrainment in the low gamma band. Further, while angular velocity in the delta and theta bands was equivalent by group, there was a significant gamma-band difference. The children with DLD also exhibited significantly more theta and gamma power compared to the control children. Regarding PAC and PPC, both groups showed significant and equivalent coupling strength. However, group resultant phase differences showed that low-frequency phase (delta and theta) affected gamma oscillations differently by group. The EEG data show important differences between children with and without DLD in the neural mechanisms underpinning the processing of rhythmic speech. The findings are discussed in terms of auditory theories of DLD.

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Neural processing of rhythmic speech by children with developmental language disorder (DLD): An EEG study

Keshavarzi,

Richards,

Feltham

et al. 2024

Imaging Neuroscience

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Sensitivity to rhythmic and prosodic cues in speech has been described as a precursor of language acquisition. Consequently, atypical rhythmic processing during infancy and early childhood has been considered a risk factor for developmental language disorders. Despite many behavioural studies, the neural processing of rhythmic speech has not yet been explored in children with developmental language disorder (DLD). Here we utilise EEG to investigate the neural processing of rhythmic speech by 9-year-old children with and without DLD. In the current study, we investigate phase entrainment, angular velocity, power, event related potentials (ERPs), phase-amplitude coupling (PAC) and phase-phase coupling (PPC), at three frequency bands selected on the basis of the prior literature, delta, theta and low gamma. We predicted a different phase of entrainment in the delta band in children with DLD, and also greater theta power, atypical cross-frequency coupling and possibly atypical gamma-band responses. Contrary to prediction, children with DLD demonstrated significant and equivalent phase entrainment in the delta and theta bands to control children. However, only the control children showed significant phase entrainment in the low gamma band. The children with DLD also exhibited significantly more theta and low gamma power compared to the control children, and there was a significant gamma-band difference in angular velocity between the two groups. Finally, group resultant phase analyses showed that low-frequency phase (delta and theta) affected gamma oscillations differently by group. These EEG data show important differences between children with and without DLD in the neural mechanisms underpinning the processing of rhythmic speech. The findings are discussed in terms of auditory theories of DLD, particularly Temporal Sampling theory.

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The Value of Electroencephalogram in Assessing Children With Speech and Language Impairments

Cited by 5 publications

References 62 publications

Why do we do EEG? Experience of two years from a new pediatric neurology center

Why do we do EEG? Experience of two years from a new pediatric neurology center

Neural processing of rhythmic speech by children with developmental language disorder (DLD): An EEG study

Neural processing of rhythmic speech by children with developmental language disorder (DLD): An EEG study

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