Longitudinal Development of Receptive Vocabulary in Children with Cerebral Palsy and Anarthria: Use of the MacArthur-Bates CDI

Vocal Characteristics of Children With Cerebral Palsy and Anarthria

PURPOSE

This study aimed to investigate the vocal characteristics of children with cerebral palsy (CP) and anarthria using the stage model of vocal development.

METHOD

Vocal characteristics of 39 children with CP and anarthria around 4 years of age were analyzed from laboratory-based caregiver-child interactions. Perceptual coding analysis was conducted using the Stark Assessment of Early Vocal Development-Revised to examine vocal complexity, volubility, and consonant diversity.

RESULTS

Children predominately produced vocalizations corresponding to the two earliest stages of vocal development characterized by vowel-like utterances. They showed a limited attainment of consonantal features with low consonant diversity and variably low vocal rates.

CONCLUSIONS

Our results demonstrate that underlying neurological impairments resulting in an anarthric status in children with CP affect the progression of speech motor development and their ability to advance beyond early vocal stages. These findings highlight the importance of considering alternative communication modalities for children demonstrating similar vocal characteristics beyond expected periods of development.

Functional dysregulation of the auditory cortex in bilateral perisylvian polymicrogyria: Multiparametric case analysis of the absent speech phenotype

The absence of speech is a clinical phenotype seen across neurodevelopmental syndromes, offering insights for neural language models. We present a case of bilateral perisylvian polymicrogyria (BPP) and complete absence of speech with considerable language comprehension and production difficulties. We extensively characterized the auditory speech perception and production circuitry by employing a multimodal neuroimaging approach. Results showed extensive cortical thickening in motor and auditory-language regions. The auditory cortex lacked sensitivity to speech stimuli despite relatively preserved thalamic projections yet had no intrinsic functional organization. Subcortical structures implicated in early stages of processing exhibited heightened sensitivity to speech. The arcuate fasciculus, a suggested marker of language in BPP, showed similar volume and integrity to a healthy control. The frontal aslant tract, linked to oromotor function, was partially reconstructed. These findings highlight the importance of assessing the auditory cortex beyond speech production structures to understand absent speech in BPP. Despite profound cortical alterations, the intrinsic motor network and motor-speech pathways remained largely intact. This case underscores the need for comprehensive phenotyping using multiple MRI modalities to uncover causes of severe disruption in language development.

Development of children, adolescents, and young adults with cerebral palsy according to the ICF: A scoping review

AIM

To identify and provide a descriptive overview of the development of children, adolescents, and young adults with cerebral palsy (CP) in longitudinal studies; and map areas of focus according to the components of the World Health Organization's International Classification of Functioning, Disability, and Health (ICF).

METHOD

Longitudinal studies of the development of children, adolescents, and/or young adults with CP were included in this scoping review. A search for eligible studies was conducted in the databases MEDLINE, PubMed, LILACS, EMBASE, Cochrane, CINAHL, and Scopus, and was restricted to the years 2002 to 2022. All outcome measures of the studies were classified into ICF components.

RESULTS

In the 56 studies included, there were 19 438 participants, involving mainly children, followed by adolescents, and lastly young adults. All components of the ICF were investigated and many studies reported outcomes in more than one component. Activity was the most investigated (67.9%; n = 38 studies), followed by body functions and structures (42.9%; n = 24 studies). Participation (14.2%; n = 8 studies) and environmental factors (3.6%; n = 2 studies) were the least studied. None of the studies investigated personal factors as an outcome.

INTERPRETATION

This scoping review provides an overview of studies on the development of children, adolescents, and young adults with CP, using the ICF framework, identifying current areas of focus and gaps in the research. Future studies should target participation, contextual factors, and the transition into adulthood.

WHAT THIS PAPER ADDS

The International Classification of Functioning, Disability, and Health can be used to map a range of outcomes through developmental studies. The main outcomes investigated in children with cerebral palsy were activity, and body functions and structures. Little has been explored in participation and contextual factors outcomes over time. The main classification used to stratify the participants was the Gross Motor Function Classification System.

Psychometric properties of the English language version of the C-BiLLT evaluated in typically developing Canadian children

PURPOSE

This study aimed to 1) investigate the convergent and discriminant validity, internal consistency, and test-retest reliability of the Canadian English version of the Computer-Based instrument for Low motor Language Testing (C-BiLLT-CAN), and 2) explore feasibility of the C-BiLLT assessment for children with cerebral palsy (CP) and complex communication needs in the Canadian health care context.

METHODS

Eighty typically developing children between 1.5 and 8.5 years of age completed the C-BiLLT-CAN, the Peabody Picture Vocabulary Test-IV (PPVT-4), the receptive language sub-test of the New Reynell Developmental Language Scales (NRDLS), and/or the Raven's 2. Correlations between raw scores were calculated for estimates of convergent and discriminant validity. Internal consistency was calculated for all items and separately for items pertaining to vocabulary and grammar. To calculate the standard error of measurement (SEM) and intraclass correlation coefficient (ICC), 33 participants were re-tested with the C-BiLLT within three weeks. Feasibility was explored with nine participants with CP.

RESULTS

C-BiLLT-CAN's convergent validity was good to excellent (Spearman's rho >  0.78) and discriminant validity was higher than hypothesized (Spearman's rho >  0.8). Internal consistency (Cronbach's alpha = 0.96), test-retest reliability (ICC >  0.9), and measurement error (SEM <  5%) were excellent. The feasibility study could not be fully completed due to the COVID-19 pandemic. Preliminary data demonstrated some technical and practical barriers for using the C-BiLLT in children with CP in Canada.

CONCLUSION

The C-BiLLT-CAN demonstrates good to excellent psychometric properties in a sample of typically developing children, indicating that it is an adequate test for measuring language comprehension in English-speaking Canadian children. Further research is needed to investigate the feasibility of the C-BiLLT-CAN in children with CP.

Desenvolvimento de crianças, adolescentes e jovens adultos com Paralisia Cerebral de acordo com a CIF? Uma revisão do escopo

Estudos sobre o desenvolvimento de indivíduos com PC ajudam terapeutas e pais a planejarem abordagens de tratamento e prognóstico futuro. Os principais desfechos investigados em indivíduos com PC foram atividade e estruturas e funções corporais. Pouco tem sido explorado em desfechos de participação e de fatores contextuais ao longo do tempo.