Search

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.

OBJECTIVE: To assess the effectiveness of group wheelchair maintenance training and investigate participant characteristics associated with responsiveness to training. DESIGN: Randomized control trial with an immediate group and waitlist control group (WLCG) who received the intervention after a 6-month delay. SETTING: Four Spinal Cord Injury Model Systems Centers. PARTICIPANTS: Manual (MWC) and power wheelchair (PWC) users with spinal cord injury (n=80 and 67, respectively). INTERVENTION: Two 90-minute structured wheelchair maintenance training program classes with 12-20 people per class and separate classes for MWC and PWC users. Each class included in-person hands-on demonstrations and practice of wheelchair maintenance. MAIN OUTCOME MEASURES: Separate analysis was completed for MWC and PWC users using the Wheelchair Maintenance Training Questionnaire (WMT-Q) capacity (ability to complete), performance (frequency of completion) and knowledge at baseline, 1-month, 6-month, 6-month-pre-training (WLCG only), and 1-year (immediate only). RESULTS: Following the intervention, participants in both the immediate and WLCG improved in maintenance capacity (MWC and PWC, p

The purpose of this study was to examine factors associated with variability in satisfaction with functional mobility (as measured by the Functional Mobility Assessment [FMA]) in users of mobility devices. Our primary hypothesis was that device type and Assistive Technology Professional (ATP) involvement will be the most significant predictors of FMA score. Our secondary hypothesis was that ATP involvement is associated with use of more custom-fitted manual wheelchairs and group 3 and 4 power wheelchairs.Retrospective cohort study.Data were collected from equipment suppliers who collaborate with clinicians to administer the FMA and associated Uniform Data Set within various settings (ie, rehabilitation clinic, school, supplier place of business).A data set of 4743 cases was included in the analysis (N=4743).Not applicable.FMA questionnaire collected at baseline, client age, gender, primary diagnosis, years since disability onset, device type, device age, living situation, ATP involvement, and geographic area.Ordinal logistic regression modeling showed that geographic area, device type, ATP involvement, primary diagnosis, gender, age, device age, and years since onset of disability significantly predicted the variance in FMA scores at P.05. Device type was the most significant predictor of variance in FMA score. Involvement of an ATP had a significant effect on the type of device that participants used (χThe relationship between ATP involvement and functional outcome supports the concept that ATP certification recognizes demonstrated competence in analyzing the needs of consumers with disabilities and selection of appropriate mobility assistive equipment with improved functional outcomes.

Contributions from premotor and supplementary motor areas to reaching behavior in aging humans are not well understood. The objective of these experiments was to examine effects of perturbations to specific cortical areas on the control of unconstrained reaches against gravity by younger and older adults. Double-pulse transcranial magnetic stimulation (TMS) was applied to scalp locations targeting primary motor cortex (M1), dorsal premotor area (PMA), supplementary motor area (SMA), or dorsolateral prefrontal cortex (DLPFC). Stimulation was intended to perturb ongoing activity in the targeted cortical region before or after a visual cue to initiate moderately paced reaches to one of three vertical target locations. Regional effects were observed in movement amplitude both early and late in the reach. Perturbation of PMA increased reach distance before the time of peak velocity to a greater extent than all other regions. Reaches showed greater deviation from a straight-line path around the time of peak velocity and greater overall curvature with perturbation of PMA and M1 relative to SMA and DLPFC. The perturbation increased positional variability of the reach path at the time of peak velocity and the time elapsing after peak velocity. Although perturbations had stronger effects on reaches by younger subjects, this group exhibited less reach path variability at the time of peak velocity and required less time to adjust the movement trajectory thereafter. These findings support the role of PMA in visually guided reaching and suggest an age-related change in sensorimotor processing, possibly due to a loss of cortical inhibitory control.

This study used a spina bifida electronic medical record and the National Spina Bifida Patient Registry to explore the relationship between neurosurgical/orthopedic surgeries and other variables on ambulation and transfer ability over time in individuals with spina bifida.This study was an analysis of longitudinal data collected within the National Spina Bifida Patient Registry and spina bifida electronic medical record. Logistic regression models were used to determine which variables were associated with ambulation/transfer ability in the myelomeningocele (MMC) and non-MMC populations.Longitudinal data from 806 individuals were collected. In the MMC group, decreased ambulation ability was associated with higher motor levels, tethered cord releases, spine/scoliosis surgeries, hip orthopedic surgeries, and having supplemental insurance. Increased ambulatory ability was associated with lower motor levels, tibial torsion/related surgeries, ankle/foot surgeries, being female, and being non-Hispanic/Latinx. Decreased transfer ability was associated with being Hispanic/Latinx and having higher motor levels. Lower motor level and ankle/foot surgeries were associated with increased transfer ability. No significant associations were found in the non-MMC group.Motor level is an important predictor of ambulation and transfer ability in MMC. Surgeries distal to the knee were associated with higher levels of function; surgeries proximal to the knee were associated with lower functional levels.

Background Inflammatory cascades following traumatic brain injury (TBI) can have both beneficial and detrimental effects on recovery. Single biomarker studies do not adequately reflect the major arms of immunity and their relationships to long-term outcomes. Thus, we applied treelet transform (TT) analysis to identify clusters of interrelated inflammatory markers reflecting major components of systemic immune function for which substantial variation exists among individuals with moderate-to-severe TBI. Methods Serial blood samples from 221 adults with moderate-to-severe TBI were collected over 1–6 months post-injury (n = 607 samples). Samples were assayed for 33 inflammatory markers using Millipore multiplex technology. TT was applied to standardized mean biomarker values generated to identify latent patterns of correlated markers. Treelet clusters (TC) were characterized by biomarkers related to adaptive immunity (TC1), innate immunity (TC2), soluble molecules (TC3), allergy immunity (TC4), and chemokines (TC5). For each TC, a score was generated as the linear combination of standardized biomarker concentrations and cluster load for each individual in the cohort. Ordinal logistic or linear regression was used to test associations between TC scores and 6- and 12-month Glasgow Outcome Scale (GOS), Disability Rating Scale (DRS), and covariates. Results When adjusting for clinical covariates, TC5 was significantly associated with 6-month GOS (odds ratio, OR = 1.44; p-value, p = 0.025) and 6-month DRS scores (OR = 1.46; p = 0.013). TC5 relationships were attenuated when including all TC scores in the model (GOS: OR = 1.29, p = 0.163; DRS: OR = 1.33, p = 0.100). When adjusting for all TC scores and covariates, only TC3 was associated with 6- and 12-month GOS (OR = 1.32, p = 0.041; OR = 1.39, p = 0.002) and also 6- and 12-month DRS (OR = 1.38, p = 0.016; OR = 1.58, p = 0.0002). When applying TT to inflammation markers significantly associated with 6-month GOS, multivariate modeling confirmed that TC3 remained significantly associated with GOS. Biomarker cluster membership remained consistent between the GOS-specific dendrogram and overall dendrogram. Conclusions TT effectively characterized chronic, systemic immunity among a cohort of individuals with moderate-to-severe TBI. We posit that chronic chemokine levels are effector molecules propagating cellular immune dysfunction, while chronic soluble receptors are inflammatory damage readouts perpetuated, in part, by persistent dysfunctional cellular immunity to impact neuro-recovery.

Objective To identify the specific features that contribute to the variability in baseline wheelchair transfer and the changes in transfer ability (gain or loss) over time for a large cohort of patients with spina bifida (SB) in the National Spina Bifida Patient Registry. Design Longitudinal cohort study. Setting A total of 35 United States outpatient SB clinic sites. Participants Individuals (N=1687) with SB ages 5-73 (median, 13.33) years who were therapeutic ambulators or nonambulators. Intervention Not applicable. Main Outcome Measure Ability to transfer from a wheelchair to another level surface. Results Bayesian Network Analysis was used to reduce the initial variable set to the following predictors: SB subphenotype, motor level, age, insurance, sex, race, ethnicity, surgical procedures, and number of visits. We used a multinomial logistic model with Wald Chi-square analysis of effects to examine the relationships between transfer ability and predictors. A total of 295 of 1687 eligible patients (17.56%) with myelomeningocele (MMC) and 6 of 58 eligible patients (10.32%) with non-MMC experienced changes in transfer ability during the period of the study. For those with MMC and non-MMC, the highest number of individuals exhibiting changes in motor level had changes from thoracic to high-lumbar, high-lumbar to thoracic, high-lumbar to midlumbar, and midlumbar to high-lumbar lesion levels. Results of the Bayesian Network Analysis revealed that motor level was the predominant factor associated with baseline transfer ability followed by age. The combination of SB sub phenotype, motor level, age, insurance status, number and type of surgical procedures, and time point accurately classified the loss, gain, or no change in transfer ability 82.7% of the time. Conclusions Motor level was the predominant factor associated with baseline transfer ability, and the change in transfer ability was directly related to a corresponding change in motor level that might be explained by changes in muscle strength of the iliopsoas and quadriceps.

• Background: Among the challenges of living with lower limb loss is the increased risk of long-term health problems that can be either attributed directly to the amputation surgery and/or prosthetic rehabilitation or indirectly to a disability-induced sedentary lifestyle. These problems are exacerbated by poorly fit prosthetic sockets. There is a knowledge gap regarding how the socket design affects in-socket mechanics, and how in-socket mechanics affect patient-reported comfort and function. The objectives of this study are: 1) to gain a better understanding of how in-socket mechanics of the residual limb in transfemoral amputees are related to patient-reported comfort and function, 2) to identify clinical tests that can streamline the socket design process, and 3) to evaluate the efficacy and cost of a novel, quantitatively informed socket optimization process.• Methods: Users of transfemoral prostheses will be asked to walk on a treadmill wearing their current socket plus 8 different check sockets with designed changes in different structural measurements that are likely to induce changes in residual limb motion, skin strain, and pressure distribution within the socket. Dynamic biplane radiography and pressure sensors will be used to measure in-socket residual limb mechanics. Patient-reported outcomes will also be collected after wearing each socket. The effects of in-socket mechanics on both physical function and patient-reported outcomes (aim 1) will be assessed using a generalized linear model. Partial correlation analysis will be used to examine the association between research grade measurements and readily available clinical measurements (aim 2). In order to compare the new quantitative design method to the Standard of Care, patient reported outcomes and cost will be compared between the two methods, utilizing the Wilcoxon Mann-Whitney non-parametric test (aim 3).• Discussion: Knowledge on how prosthetic socket modifications affect residual bone and skin biomechanics itself can be applied to devise future socket designs, and the methodology can be used to investigate and improve such designs, past and present. Apart from saving time and costs, this may result in better prosthetic socket fit for a large patient population, thus increasing their mobility, participation, and overall health-related quality of life. • Trial registration: clinicaltrials.gov: NCT05041998

Among the noted disadvantages of prosthesis suspension by flexible liner is the increased rate of perspiration within the socket, which has the potential to cause discomfort, suspension issues, and tissue damage. In recent years, phase change material technology has been adopted for the use in prosthesis liners. These promise to improve temperature control and, consequently, reduce sweating. Previous work has demonstrated that this approach is effective in slowing the temperature increase at the limb-socket interface, but it was not clear how this would translate to clinical outcomes. This study had the aim to compare conventional and phase change material liners regarding prosthesis utilization, physical performance, and patient-reported outcome measures. A randomized double-blind cross-over study design with 6-month intervention periods was used. Of the 42 enrolled participants, only 50% completed the protocol. The high attrition was in large part because of the COVID-19 pandemic that started disrupting daily life and thereby the data collection midway through the study period. The findings indicate that the temperature control liners were, by trend, associated with better prosthesis utilization. The found effects did not reach the level of statistical significance, which is likely a result of the unduly reduced sample size.

OBJECTIVES: To develop a method of identifying children with medical complexity (CMC) from the National Survey of Children’s Health (NSCH) 2016–2017 combined data set, to compare this approach to existing CMC identification strategies, and to describe sociodemographic characteristics of our CMC sample. METHODS: Using survey items pertinent to the medical complexity domains in the style by Cohen et al (chronic health conditions, health service needs, health care use, and functional limitations), we created a schema to categorize children as CMC by applying a 95th percentile cutoff for survey item positivity. We applied existing CMC identification techniques to the NSCH. We used 2-proportion z tests to compare the classification output of our CMC identification method to those of existing approaches. We used χ2 analyses to examine relationships between child and family characteristics, comparing CMC with children with special health care needs (CSHCN) and children with no special health care needs. RESULTS: Among the 71 811 children in the sample, 1.5% were classified as CMC by our method, representing almost 1.2 million children (weighted) in the United States in 2016–2017. CSHCN and children with no special health care needs represented 17.2% (weighted n = 12.6 million) and 81.2% (weighted n = 59.6 million) of the sample, respectively. Our approach classified a significantly smaller number of CSHCN as CMC than existing CMC identification methods, which classified 3.9% to 13.2% of the 2016–2017 NSCH sample as more complex (P < .001). CMC status was significantly associated with male sex, minority race or ethnicity, and experiencing socioeconomic adversity (all P < .001). CONCLUSIONS: This method enables standardized identification of CMC from NSCH data sets, thus allowing for an examination of CMC health outcomes, pertinent to pediatric hospitalist medicine, contained in the survey.

OBJECTIVES: To describe the access of children with medical complexity (CMC) to well-functioning health care systems. To examine the relationships between medical complexity status and this outcome and its component indicators. PATIENTS AND METHODS: Secondary analysis of children in the National Survey of Children’s Health combined 2016–2017 data set who received care in well-functioning health systems. Secondary outcomes included this measure’s component indicators. The χ2 analyses were used to examine associations between child and family characteristics and the primary outcome. Adjusted multivariable logistic regression was used to examine relationships between medical complexity status and primary and secondary outcomes. Using these regression models, we examined the interaction between medical complexity status and household income. RESULTS: CMC accounted for 1.6% of the weighted sample (n = 1.2 million children). Few CMC (7.6%) received care in a well-functioning health care system. CMC were significantly less likely than children with special health care needs (CSHCN) (odds ratio, 0.3) of meeting criteria for this primary outcome. Attainment rates for secondary outcomes (families feeling like partners in care; receives care within a medical home; received needed health care) were significantly lower among CMC than CSHCN. Family income was significantly associated with likelihood of meeting criteria for primary and secondary outcomes; however, the relationships between medical complexity status and our outcomes did not differ by income level. CONCLUSIONS: CMC are less likely than other CSHCN to report receiving care in well-functioning health care systems at all income levels. Further efforts are necessary to better adapt current health care systems to meet the unique needs of CMC.

BackgroundThe specific and dynamic contributions of premotor and supplementary motor areas to reaching movements in aging humans are not well understood.ObjectiveTo better understand the role of cortical motor regions and age on the control of unconstrained reaches against gravity by neurologically intact, younger and older adults.MethodsDouble pulse transcranial magnetic stimulation (TMS) was applied at locations targeting primary motor cortex (M1), dorsal premotor area (PMA), supplementary motor area (SMA), or dorsolateral prefrontal cortex (DLPFC). Paired stimuli were delivered before or after a visual cue was presented to initiate self-paced right-handed reaches to one of three, vertically oriented target locations.ResultsRegional stimulation effects on movement amplitude were observed both early and late in the reach. PMA stimulation increased reach distance to a greater extent than M1, SMA, and DLPFC stimulation. M1 and PMA stimulation increased deviation from the straight-line path around the time of peak velocity to an extent that was greater than SMA and DLPFC stimulation. Cortical stimulation increased the time that elapsed after, but not before, peak velocity. Despite stronger effects of stimulation on reaches in the younger group, this group had shorter times to reach the target after reaching peak velocity.ConclusionThese results provide support for a role of PMA in visually guided movement after movement initiation. For older subjects, the increased time to arrive at the target after peak velocity despite weaker stimulation effects suggests an age-related reduction in sensorimotor processing flexibility for online control of unconstrained reaching.HighlightsDorsal premotor area stimulation at any time during the reaction-time period and early reaching affected early reach kinematics at least as much as stimulation of primary motor cortex.Older individuals had more stimulation-related interference in the late components of reaching despite having less early effect of stimulation, suggesting a reduction in flexibility of dynamic motor control due to aging.The antigravity component of unconstrained reaching did not have special aspects for regional cortical effects of stimulation.

Objective To determine if functional measures of ambulation can be accurately classified using clinical measures; demographics; personal, psychosocial, and environmental factors; and limb accelerations (LAs) obtained during sleep among individuals with chronic, motor incomplete spinal cord injury (SCI) in an effort to guide future, longitudinal predictions models. Design Cross-sectional, 1-5 days of data collection. Setting Community-based data collection. Participants Adults with chronic (>1 year), motor incomplete SCI (N=27). Interventions Not applicable. Main Outcome Measures Ambulatory ability based on the 10-m walk test (10MWT) or 6-minute walk test (6MWT) categorized as nonambulatory, household ambulator (0.01-0.44 m/s, 1-204 m), or community ambulator (>0.44 m/s, >204 m). A random forest model classified ambulatory ability using input features including clinical measures of strength, sensation, and spasticity; demographics; personal, psychosocial, and environmental factors including pain, environmental factors, health, social support, self-efficacy, resilience, and sleep quality; and LAs measured during sleep. Machine learning methods were used explicitly to avoid overfitting and minimize the possibility of biased results. Results The combination of LA, clinical, and demographic features resulted in the highest classification accuracies for both functional ambulation outcomes (10MWT=70.4%, 6MWT=81.5%). Adding LAs, personal, psychosocial, and environmental factors, or both increased the accuracy of classification compared with the clinical/demographic features alone. Clinical measures of strength and sensation (especially knee flexion strength), LA measures of movement smoothness, and presence of pain and comorbidities were among the most important features selected for the models. Conclusions The addition of LA and personal, psychosocial, and environmental features increased functional ambulation classification accuracy in a population with incomplete SCI for whom improved prognosis for mobility outcomes is needed. These findings provide support for future longitudinal studies that use LA; personal, psychosocial, and environmental factors; and advanced analyses to improve clinical prediction rules for functional mobility outcomes.

Objectives To determine the reliability and validity of the Modified Heckmatt scale in assessing muscle echotexture in spasticity. Design Prospective, observational, 2-center study. Two residents and 2 ultrasound experienced staff physicians each rated 100 ultrasound images that were also analyzed using quantitative gray-scale. Setting Academic ambulatory spasticity clinic. Participants Participants (N=50) included 45 patients with upper or lower extremity spasticity and 5 healthy references. Interventions Not applicable. Main Outcome Measures Modified Heckmatt scale ratings and quantitative gray-scale scores Results Inter- and intra-rater intraclass correlation coefficients were 0.76 and 0.81, respectively (P, Highlights • Spasticity can alter muscle architecture as viewed with ultrasound. • Spastic muscles can show increased echointensity (EI). • Spastic muscles with increased EI may respond less favorably to botulinum toxin. • Muscle EI can be quantified using the Modified Heckmatt scale. • The Modified Heckmatt scale demonstrated good reliability and validity.

OBJECTIVE: To investigate the changes in total internet and mobile internet use over time and determine how demographic characteristics are related to changes in internet and mobile internet use among individuals with spinal cord injury (SCI). DESIGN: Cross-sectional analysis of multicenter cohort study. SETTING: National SCI Database. PARTICIPANTS: Persons with traumatic SCI with follow-up data collected between 2012 and 2018 (n=13,622). INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURE: Proportion of sample reporting internet use at all or through a mobile device over time and specifically in 2018. RESULTS: The proportion of internet users increased from 77.7% in 2012 to 88.1% in 2018. Older participants (p

Restoring somatosensory feedback to people with limb amputations is crucial for improving prosthesis acceptance and function. Epidural spinal cord stimulation is a commonly used clinical procedure that targets sensory neural pathways in the dorsal spinal cord to treat pain conditions. A similar approach could be developed as a clinically translatable means to restore somatosensation in amputees. We show that epidural stimulation of the dorsal spinal cord evoked sensory percepts, perceived as emanating from the amputated arm and hand, in four people with upper-limb amputation. After an initial caudal movement immediately following the implantation, the leads stabilized, exhibiting a median migration of

Background Individuals with spinal cord injury (SCI) are at risk for secondary medical complications, such as urinary tract infections (UTIs) and pressure injuries, that could potentially be mitigated through improved self-management techniques. The Interactive Mobile Health and Rehabilitation (iMHere) mobile health (mHealth) system was developed to support self-management for individuals with disabilities. Objective The main objective of this study was to determine if the use of iMHere would be associated with improved health outcomes over a 9-month period. A secondary objective was to determine if the use of iMHere would be associated with improved psychosocial outcomes. Phone usage, app usage, and training time data were also collected to analyze trends in iMHere use. Methods Overall, 38 participants with SCI were randomized into either the intervention group who used the iMHere system and received standard care or the control group who received standard care without any technology intervention. Health outcomes were recorded for the year before entry into the study and during the 9 months of the study. Participants completed surveys at baseline and every 3 months to measure psychosocial outcomes. Results The intervention group had a statistically significant reduction in UTIs (0.47 events per person; P=.03; number needed to treat=2.11). Although no psychosocial outcomes changed significantly, there was a nonsignificant trend toward a reduction in mood symptoms in the intervention group compared with the control group meeting the threshold for clinical significance. Approximately 34 min per participant per month were needed on average to manage the system and provide technical support through this mHealth system. Conclusions The use of the iMHere mHealth system may be a valuable tool in the prevention of UTIs or reductions in depressive symptoms. Given these findings, iMHere has potential scalability for larger populations. Trial Registration ClinicalTrials.gov NCT02592291; https://clinicaltrials.gov/ct2/show/NCT02592291.