Adults with spina bifida: ambulatory performance and cognitive capacity in relation to muscle function

Memory in Spina Bifida, from Childhood to Adulthood: A Systematic Review

Background: Spina bifida (SB) is a rare congenital disease characterized by not only physical but also neuropsychological disturbances. Among these neuropsychological impairments, memory deficits are a significant concern, as they substantially hinder aspects of crucial importance in the lives of individuals with SB such as medical needs or daily life activities. The main objective is to conduct a systematic review of the current evidence on the memory deficits in the SB population, including children, adolescents, and adults. Methods: Four databases (PubMed, SCOPUS, Web of Science, and ProQuest) were systematically screened for eligible studies. Results: The present review reveals cognitive difficulties in different memory types among individuals with SB. These deficits, identified in childhood, seem to persist into adulthood. Specifically, impairments are evident in short-term memory, working memory, and long-term memory. The neuropsychological instruments applied in the studies that were included in this systematic review vary, however, most reach the same conclusions. Conclusions: The present findings underscore the importance of incorporating cognitive assessments, particularly those focused on the memory domain, into routine childhood evaluations for individuals with SB. Early identification of these cognitive difficulties allows for the timely implementation of cognitive interventions that could leverage the inherent plasticity of the developing brain, and prevent or delay the onset of these deficits in later adulthood for people with SB, ultimately improving their functionality and quality of life.

Establishing Content Validity Evidence of the Pittsburgh Impairment Testing Tool (PITT) for Adults With Spina Bifida

Background

Current scales to measure motor impairment in adults with spina bifida (SB) are limited by their complexity, variable interpretation (i.e., subjectively defined impairment levels), or inclusion of muscles groups that are not always practical to test in a clinical setting.

Objectives

A novel motor impairment tool for adults with SB was evaluated for content validity. The tool uses findings from the manual muscle testing of hip flexion and knee extension to categorize individuals into four motor impairment groups.

Methods

Expert feedback was obtained on the tool, and content validity was measured using Lawshe's content validity ratio (CVR) with critical values recommended by Ayre and Scally. Data from phase 1 and phase 2 were used to revise the survey and calculate the CVR of the tool, respectively (benchmark: CVR ≥ 0.636).

Results

Of the 26 experts recruited, 17 received the survey and 15 participated in either phase 1 (n = 6) or 2 (n = 11). The CVR values for each impairment group were as follows: intact strength (0.95), thoracic strength (0.90), hip flexor dominant strength (0.89), and knee extensor dominant strength (0.82). The CVR of the tool overall was 0.89. Qualitative expert feedback revealed common barriers to manual muscle testing and suggestions for improving the tool. However, experts also noted the value in preserving the simplicity of the tool.

Conclusion

The high content validity, coupled with expert feedback, suggests the tool may give clinicians and researchers a practical method of classifying an individual's extent of motor impairment.

Gait and dynamic balance in adults with spina bifida

BACKGROUND

Spina bifida (SB) is a complex congenital malformation, often causing impaired gait performance depending on the level and extent of malformation. Research regarding gait and balance performance in adults with SB, has not been sufficiently described yet.

RESEARCH QUESTION

What are the characteristics of spatiotemporal gait parameters and balance performance in adults with SB? Further, do persons with muscle function (MF) level 3 differ regarding gait and balance performance from those with MF level 1-2?

METHODS

Cross-sectional observational study at an outpatient clinic. 41 adults with SB (18-65 years), who walked regularly. Spatiotemporal parameters of gait was assessed with the APDM system and balance performance with the Mini Balance Evaluation Systems Test (Mini-BESTest). Muscle strength in the legs was assessed with 0-5 manual muscle test, and participants were classified according to level of MF into groups MF1, MF2, and MF3. Two-sided t-test was used for parametric independent variables, and Cohen's d was used for effect sizes. The Mann-Whitney U test was used for non-parametric independent data and effect size was calculated by the z value (r = z/√n).

RESULTS

Mean gait speed was 0.96 (SD 0.20) m/s and mean stride length 1.08 m (SD 0.17), individuals with MF3 showed significantly slower gaitspeed and shorter stride length (p < 0.05). Lumbar rotation was 21° (SD 11), and thoracic lateral sway 15° (IQR 15) with significantley difference (p < 0.001 and p < 0.05) for individuals in MF3. Mini-BESTest showed a mean score of 11.3 (SD 6.9), and individuals with MF3 showed significantly lower scores (p ≤ 0.001).

SIGNIFICANCE

Gait and balance performance was reduced compared to normative data in almost all parameters, especially in persons with less muscle function. Increased knowledge from advanced gait analysis may help healthcare professionals to design rehabilitation programmes, in order to achieve and maintain a sustainable gait and balance performance.