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Background: The majority of children with cerebral palsy (CP) experience challenges in functional communication from a young age. A pivotal aspect of functional communication is language comprehension. A variety of classification systems and questionnaires are available to classify and describe functional communication skills in children with CP. A better understanding of the convergent validity of (subsections of) these tools, as well as their relationship with spoken language comprehension, will be valuable in both clinical practice and research. Aims: To investigate the convergent validity of (subsections of) functional communication tools and the relationship with spoken language comprehension in children with CP. Methods & Procedures: Cross-sectional data on 138 children were subdivided into three developmental stages based on (Dutch) educational phases: ages 18 months-3;11y (n = 59), 4;0-5;11 years (n = 37) and 6;0-8;11 years (n = 42). The following functional communication tools were used to classify and describe functional communication: Communication Function Classification System (CFCS), subscales of the Caregivers Priorities and Child Health Index of Life with Disabilities--Dutch Version (CPCHILD-DV) and the Focus on Communication Under Six-34 (FOCUS-34) questionnaire. Spoken language comprehension was assessed with the Computer-Based instrument for Low motor Language Testing (C-BiLLT). Correlations between the functional communication tools, and with the C-BiLLT, were calculated using Pearson's and Spearman's correlation coefficients. It was hypothesized a priori that correlations of at least 0.60 suggest good convergent validity. Outcomes & Results: At all developmental stages, a significant ordered decreasing tendency of communication outcomes was found across CFCS levels; lower CFCS levels were associated with lower scores on the CPCHILD-DV and FOCUS-34, and with a lower level of spoken language comprehension (C-BiLLT). Correlation coefficients of the functional communication tools exceeded 0.60 at all developmental stages. Correlations between C-BiLLT raw scores and the functional communication tools varied between 0.351 and 0.591 at developmental stage 18 months-3;11 years, between 0.781 and 0.897 at developmental stage 4;0-5;11 years, and between 0.635 and 0.659 at developmental stage 6;0-8;11 years. Conclusions & Implications: The functional communication tools assessed in this study showed convergent validity at all developmental stages. The CFCS, currently most widely used in paediatric rehabilitation, is adequate in the classification of functional communication. However, for more detailed clinical goal setting and evaluation of change in functional communication, the additional use of FOCUS-34 or CPCHILD-DV is recommended.

Spasticity is a common impairment within pediatric neuromusculoskeletal disorders. How spasticity contributes to gait deviations is important for treatment selection. Our aim was to evaluate the pathophysiological mechanisms underlying gait deviations seen in children with spasticity, using predictive simulations. A cluster analysis was performed to extract distinct gait patterns from experimental gait data of 17 children with spasticity to be used as comparative validation data. A forward dynamic simulation framework was employed to predict gait with either velocity- or force-based hyperreflexia. This framework entailed a generic musculoskeletal model controlled by reflexes and supraspinal drive, governed by a multiobjective cost function. Hyperreflexia values were optimized to enable the simulated gait to best match experimental gait patterns. Three experimental gait patterns were extracted: (1) increased knee flexion, (2) increased ankle plantar flexion, and (3) increased knee flexion and ankle plantar flexion when compared with typical gait. Overall, velocity-based hyperreflexia outperformed force-based hyperreflexia. The first gait pattern could mostly be explained by rectus femoris and hamstrings velocity-based hyperreflexia, the second by gastrocnemius velocity-based hyperreflexia, and the third by gastrocnemius, soleus, and hamstrings velocity-based hyperreflexia. This study shows how velocity-based hyperreflexia from specific muscles contributes to different spastic gait patterns, which may help in providing targeted treatment. [ABSTRACT FROM AUTHOR]

Aim: To investigate spoken language comprehension (SLC), single‐word comprehension (SWC), functional communication development, and their determinants, in children with cerebral palsy. Method: This was a prospective cohort study in the Netherlands spanning 2 years 6 months. The main outcomes were SLC and SWC, assessed by the Computer‐Based instrument for Low motor Language Testing (C‐BiLLT) and the Peabody Picture Vocabulary Test‐III‐NL (PPVT‐III‐NL) respectively; and functional communication, measured by a subscale of the Focus on the Outcomes of Communication Under Six‐34 (FOCUS‐34). Linear mixed models were used to determine developmental trajectories, which were compared with norm and reference data. Potential determinants, for example intellectual functions, speech production, functional communication level (classified with the Communication Function Classification System, CFCS), and functional mobility, were added to assess their effects. Results: Children with cerebral palsy (n = 188; mean age 59 months, range 17–110) were monitored for 2 years 6 months. Developmental trajectories for SLC (C‐BiLLT) and SWC (PPVT‐III‐NL) were nonlinear; those for functional communication (FOCUS‐34) were linear. Compared with norm and reference groups, significantly delayed SLC, SWC, and functional communication development were found. Determinants for SLC and SWC were intellectual functions and functional communication level (CFCS); and for functional communication development (FOCUS‐34), speech production and arm–hand functioning. Interpretation: Children with cerebral palsy showed delayed SLC, SWC, and functional communication development compared with norm and reference groups. Remarkably, functional mobility was not associated with the development of SLC, SWC, or functional communication. What this paper adds: Children with cerebral palsy have delayed spoken language comprehension (SLC), single‐word comprehension (SWC), and functional communication development, compared to norm and reference data.Determinants for SLC and SWC development are intellectual functions and functional communication level.Determinants for functional communication development are speech production and arm–hand functioning.Functional mobility is not associated with SLC, SWC, or functional communication. What this paper adds: Children with cerebral palsy have delayed spoken language comprehension (SLC), single‐word comprehension (SWC), and functional communication development, compared to norm and reference data.Determinants for SLC and SWC development are intellectual functions and functional communication level.Determinants for functional communication development are speech production and arm–hand functioning.Functional mobility is not associated with SLC, SWC, or functional communication. Video Podcast: https://youtu.be/x09Tac7tsz0 [ABSTRACT FROM AUTHOR]

To identify determinants of spoken language comprehension (SLC) in children with cerebral palsy (CP). Cross-sectional data of 207 children with CP were included: 82 toddlers (18 months–3;11 years), 59 preschool children (4;0–5;11 years), and 66 schoolchildren (6;0–8;11 years), across all Gross Motor Function Classification System (GMFCS) levels. SLC was assessed using the Computer-Based instrument for Low motor Language Testing (C-BiLLT). Potential determinants were retrieved from medical files and through parental questionnaires. Per developmental stage, multivariable regression analyses were used to assess determinants of SLC. Fifty-nine percent of the children showed below average SLC. Significant determinants for SLC differed per developmental stage. In toddlers: age, motor type, functional communication and speech function (R2 = 0.637); in preschool children: functional communication, speech function and language activities (R2 = 0.820), and in schoolchildren: functional communication, intellectual functioning and arm-hand functioning (R2 = 0.807). For all developmental stages, functional mobility was not a significant determinant. A large proportion of children with CP across all GMFCS levels have SLC impairments. Findings indicate that SLC is strongly determined by functional communication classified with CFCS. We recommend standardized assessment and monitoring of SLC in all children with CP. Children across all GMFCS levels can experience difficulties in spoken language comprehension. At all developmental stages, functional communication (classified with CFCS) is an important determinant of spoken language comprehension. Standardized assessment and monitoring of spoken language comprehension, language production, speech, and communication of all children with CP, is strongly recommended. When children show below average performances, especially in spoken language comprehension, intervening with speech and language therapy and guidance for parents, is advised. [ABSTRACT FROM AUTHOR]

Purpose: The Viking Speech Scale is used to classify speech performance in children with cerebral palsy (CP). A Dutch‐language version (VSS‐NL) has recently become available. This study aimed to determine the reliability and validity of the VSS‐NL and the association with motor type of CP, Gross Motor Function Classification System (GMFCS), Manual Ability Classification System (MACS) and Communication Function Classification System (CFCS). Methods: A total of 90 children with CP, recruited throughout the Netherlands, took part in the study. VSS‐NL classifications by speech and language therapists unfamiliar (SLT1) and familiar (SLT2) with the child, parents and physicians were compared. Convergent and discriminant validity were determined with the Intelligibility in Context Scale‐Dutch (ICS‐NL) and the Computer Based Instrument for Low Motor Language Testing (C‐BiLLT). Inter‐ and intrarater reliability were determined by weighted Kappa (ƙw). Validity and associations between VSS‐NL and GMFCS, MACS and CFCS were determined with Spearman's coefficient. Association between VSS‐NL and motor type of CP was determined with Fisher's exact test. Results: Interrater reliability was excellent between SLT1‐SLT2 (ƙw = 0.93, 95% confidence interval [CI] 0.87–0.99), good between SLT1‐parent (ƙw = 0.71, 95% CI 0.60–0.83), SLT1‐physician (ƙw = 0.70, 95% CI 0.58–0.81), SLT2‐parent (ƙw = 0.71, 95% CI 0.57–0.84), SLT2‐physician (ƙw = 0.73, 95% CI 0.62–0.85) and parent‐physician (ƙ = 0.72, 95% CI 0.60–0.85). Intrarater reliability was excellent for SLTs familiar and unfamiliar to the child (ƙw = 1.00, 95% CI 1.00–1.00), and very good for physicians (ƙw = 0.89, 95% CI 0.75–1.00) and parents (ƙw = 0.72, 95% CI 0.62–1.00). Convergent validity was very strong (r = −0.81, p < 0.001) and discriminant validity moderate (r = −0.56, p < 0.001). Association with motor type of CP was significant (χ2 = 27.558, p < 0.001) and strong with GMFCS (r = 0.62, p < 0.001), MACS (r = 0.63, p < 0.01) and CFCS (r = 0.69, p < 0.001). Conclusion: The VSS‐NL is a reliable and valid system to classify speech performance in children with cerebral palsy. Classifications can be performed by SLTs, parents and physicians. [ABSTRACT FROM AUTHOR]

To assess attainment of individual treatment goals one year after intrathecal baclofen (ITB) pump implantation in individuals with dyskinetic cerebral palsy (CP). A multi-center prospective cohort study was conducted including 34 non-walking individuals with severe dyskinetic CP, classified as Gross Motor Function Classification System (GMFCS) IV/V, aged 4–24 years, 12 months after pump implantation. The main outcome measure was Goal Attainment Scaling (GAS). Predictors of GAS results were analyzed. Complications were registered systematically. Seventy-one percent of individuals with dyskinetic CP fully achieved one or more treatment goals. One or more treatment goals were partially achieved in 97% of individuals. Two factors were found to be associated with attainment of goals: Dyskinesia Impairment Scale (DIS) score at baseline and the difference in pain score between baseline and follow-up. These two variables explain 30% of the variance in the outcome. Intrathecal baclofen is effective in achieving individual treatment goals in children and young adults with dyskinetic CP after nine to 12 months of ITB treatment. A positive outcome on treatment goals is, for a small part, associated with higher severity of dystonia at baseline and with improvement of pain during treatment. Dutch Trial Register, number NTR3642. Intrathecal baclofen treatment is effective in attainment of personal treatment goals, one year after pump implantation in patients with dyskinetic cerebral palsy. A positive outcome on treatment goals is, for a small part, related to higher severity of dystonia at the start and on improvement of pain during treatment. [ABSTRACT FROM AUTHOR]