Characterization of an Algorithm for Autonomous, Closed-Loop Neuromodulation During Motor Rehabilitation.

BACKGROUND: Recent evidence demonstrates that manually triggered vagus nerve stimulation (VNS) combined with rehabilitation leads to increased recovery of upper limb motor function after stroke. This approach is premised on studies demonstrating that the timing of stimulation relative to movements is a key determinant in the effectiveness of this approach. OBJECTIVE: The overall goal of the study was to identify an algorithm that could be used to automatically trigger VNS on the best movements during rehabilitative exercises while maintaining a desired interval between stimulations to reduce the burden of manual stimulation triggering. METHODS: To develop the algorithm, we analyzed movement data collected from patients with a history of neurological injury. We applied 3 different algorithms to the signal, analyzed their triggering choices, and then validated the best algorithm by comparing triggering choices to those selected by a therapist delivering VNS therapy. RESULTS: The dynamic algorithm triggered above the 95th percentile of maximum movement at a rate of 5.09 (interquartile range [IQR] = 0.74) triggers per minute. The periodic algorithm produces stimulation at set intervals but low movement selectivity (34.05%, IQR = 7.47), while the static threshold algorithm produces long interstimulus intervals (27.16 ± 2.01 seconds) with selectivity of 64.49% (IQR = 25.38). On average, the dynamic algorithm selects movements that are 54 ± 3% larger than therapist-selected movements. CONCLUSIONS: This study shows that a dynamic algorithm is an effective strategy to trigger VNS during the best movements at a reliable triggering rate.

Current practice focus trends in physical medicine and rehabilitation.

BACKGROUND: Physical medicine and rehabilitation (PM&R) is a diverse specialty, growing and evolving over a variety of subspecialty and practice focus areas. Accurate data regarding practice patterns of physiatrists are essential for updating requirements in training and certification, particularly as the Accreditation Council for Graduate Medical Education begins its process to update of the PM&R core residency training requirements. This study analyzes practice trends for nearly 98% of physiatrists in active practice, the largest study to date. OBJECTIVE: To update current demographics of physicians specializing in PM&R, including current areas of practice focus, to analyze the alignment of practice focus with subspecialty certification, and to determine the extent that electromyography is a component of current physiatric practice. DESIGN: Retrospective analysis of deidentified responses from American Board of Physical Medicine and Rehabilitation (ABPMR) board-certified PM&R physicians (diplomates) on annual enrollment in the ABPMR Continuing Certification program. PARTICIPANTS: A total of 9543 ABPMR diplomates. MAIN OUTCOME MEASURES: Demographics - age, gender, years in practice, practice setting(s) and area(s). Practice focus, subspecialty certifications. RESULTS: The majority of practicing physiatrists are men (62%) although the percentage of women in the field is growing (38%). Nearly 80% of physiatrists report more than one practice focus area, with pain medicine and sports medicine/musculoskeletal practices most commonly reported. CONCLUSIONS: This study confirms the growth trends in PM&R in pain and sports medicine but also highlights the substantial number of physiatrists focusing their practices in areas related to neurorehabilitation and medical rehabilitation. The large majority of physiatrists incorporate multiple focus areas into their practices. Electromyography is a focus for a declining percentage of practicing physiatrists.

Vagus Nerve Stimulation Must Occur During Tactile Rehabilitation to Enhance Somatosensory Recovery.

Chronic sensory loss is a common and undertreated consequence of many forms of neurological injury. Emerging evidence indicates that vagus nerve stimulation (VNS) delivered during tactile rehabilitation promotes recovery of somatosensation. Here, we systematically varied the timing of VNS relative to tactile rehabilitation to determine the paradigm that yields the greatest degree of somatosensory recovery after peripheral nerve injury (PNI). The medial and ulnar nerves in rats were transected, causing chronic sensory loss. Eight weeks after injury, rats were given a VNS implant followed by four weeks of tactile rehabilitation sessions consisting of repeated mechanical stimuli to the previously denervated forepaw. Rats received VNS before, during, or after tactile rehabilitation. Delivery of VNS during rehabilitative training generates robust, significant recovery compared to rehabilitative training without stimulation (56 ± 14% improvement over sham stimulation). A matched amount of VNS before training, immediately after training, or two hours after training is significantly less effective than VNS during rehabilitative training and fails to improve recovery compared to rehabilitative training alone (5 ± 10%, 4 ± 11%, and -7 ± 22% improvement over sham stimulation, respectively). These findings indicate that concurrent delivery of VNS during rehabilitative training is most effective and illustrate the importance of considering stimulation timing for clinical implementation of VNS therapy.

Functional Impairment in Pediatric Cancer Survivorship.

Care for pediatric cancer survivors must include scheduled, thorough evaluations of potential chronic and late effects resulting from multidimensional cancer treatments. Assessment of functional independence with activities and participation is critical in assuring that survivors can optimally access their environments and pursue educational, occupational, and leisure activities appropriate to their interests and capabilities. Owing to their expertise in both rehabilitation and habilitation, pediatric physiatrists are of great benefit in the care of survivors of pediatric cancer.

Usage of RePlay as a Take-Home System to Support High-Repetition Motor Rehabilitation After Neurological Injury.

Stroke is a leading cause of chronic motor disability. While physical rehabilitation can promote functional recovery, several barriers prevent patients from receiving optimal rehabilitative care. Easy access to at-home rehabilitative tools could increase patients' ability to participate in rehabilitative exercises, which may lead to improved outcomes. Toward achieving this goal, we developed RePlay: a novel system that facilitates unsupervised rehabilitative exercises at home. RePlay leverages available consumer technology to provide a simple tool that allows users to perform common rehabilitative exercises in a gameplay environment. RePlay collects quantitative time series force and movement data from handheld devices, which provide therapists the ability to quantify gains and individualize rehabilitative regimens. RePlay was developed in C# using Visual Studio. In this feasibility study, we assessed whether participants with neurological injury are capable of using the RePlay system in both a supervised in-office setting and an unsupervised at-home setting, and we assessed their adherence to the unsupervised at-home rehabilitation assignment. All participants were assigned a set of 18 games and exercises to play each day. Participants produced on average 698 ± 36 discrete movements during the initial 1 hour in-office visit. A subset of participants who used the system at home produced 1593 ± 197 discrete movements per day. Participants demonstrated a high degree of engagement while using the system at home, typically completing nearly double the number of assigned exercises per day. These findings indicate that the open-source RePlay system may be a feasible tool to facilitate access to rehabilitative exercises and potentially improve overall patient outcomes.

First year impacts of the COVID-19 pandemic on pediatric physiatrists.

PURPOSE: The objective of this study was to determine how the COVID-19 pandemic impacted the work and compensation of pediatric physiatrists during the first year of the pandemic. METHODS: Pediatric physiatrists were surveyed in the spring of 2021 about how the first year of the COVID-19 pandemic impacted their practices as a part of a larger survey examining pediatric rehabilitation medicine practices. The COVID-19 specific questions covered three topic areas: 1) personal experiences with COVID-19; 2) occupational workflow changes due to COVID-19, including telehealth; and 3) employment consequences of the COVID-19 pandemic. RESULTS: Thirteen of 259 pediatric physiatrists reported having a COVID-19 infection, of whom none required hospitalization. Nearly all (96.5%) of pediatric physiatrists reported using telehealth during the pandemic compared to 14% prior to the pandemic. They reported numerous changes to their clinical operations, and 50% reported not having adequate personal protective equipment available for themselves or their staff all of the time. Fifteen pediatric physiatrists (5.9%) reported being furloughed, and three reported job loss during the first year of the pandemic. CONCLUSION: While only a small percentage of pediatric physiatrists contracted COVID-19 during the first year of the pandemic, nearly all experienced workflow changes.

The Impact of COVID-19 on Pediatric Telepsychiatry Training in Child and Adolescent Psychiatry Fellowships.

OBJECTIVE: This report summarizes findings from a 2020 survey of US child and adolescent psychiatry training programs that explored the impact of the COVID-19 pandemic on pediatric telepsychiatry training. The authors hypothesized that telepsychiatry training significantly increased during the pandemic, in part due to legal and regulatory waivers during the COVID-19 public health emergency. METHODS: In August 2020, an anonymous, 28-question online survey was emailed to all (138) accredited child psychiatry fellowships on the Accreditation Council for Graduate Medical Education website. Forty-nine programs responded (36%). This analysis focuses on three of the 28 questions relevant to the hypotheses: characteristics of the program's training in telepsychiatry; perceived impediments to clinical training; and perceived impediments to didactic training pre-COVID onset vs. post-COVID onset, respectively. Total scores were created to investigate differences in training programs and impediments to including telepsychiatry pre- and post-COVID onset. Paired sample t-tests were used to compare means pre- and post-COVID onset. RESULTS: Results provided support for significant differences between training components related to telepsychiatry pre- and post-COVID onset, with participants reporting more training components post-COVID onset (M = 5.69) than pre-COVID onset (M = 1.80); t(48) = 9.33, p < .001. Participants also reported significantly fewer barriers to providing clinical experiences in pediatric telepsychiatry post-COVID onset (M = 2.65) than pre-COVID onset (M = 4.90); t(48) = - 4.20, p < .001. CONCLUSIONS: During the COVID-19 pandemic, pediatric telepsychiatry training in child psychiatry fellowships increased significantly. Perceived barriers to providing clinical, but not didactic, training decreased significantly.

Assessing the Field of Pediatric Rehabilitation Medicine's Interest in Expanding Fellowship Training to Pediatricians.

BACKGROUND: Training opportunities to pursue a career in pediatric rehabilitation medicine (PRM) have evolved over the last 40 years, with the most recent change being the development and accreditation of PRM fellowships and subspecialty certification in PRM. Currently the American Board of Physical Medicine & Rehabilitation (ABPMR) requires all candidates for PRM subspecialty certification to have completed a physical medicine and rehabilitation (PM&R) residency. The small number of certified PRM physicians has prompted debate within the field about permitting pediatricians to enter PRM fellowships without having to complete a PM&R residency. OBJECTIVE: To assess the level of interest within the field of PRM in creating a pathway to PRM for pediatricians. DESIGN: Survey of pediatric physiatrists in the United States in 2017. SETTING: National. PARTICIPANTS: Pediatric physiatrists. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASUREMENTS: Favorability toward pediatricians becoming certified in PRM. RESULTS: Most respondents (62%) were in favor of pediatricians having the opportunity to pursue training in PRM, with an increase in support (70%) after being introduced to workforce issues in PRM. Training time for pediatricians was the largest concern identified by respondents who were not in favor (80%), with additional themes identified including dilution of the essence of the field and operationalization issues. CONCLUSIONS: With a small number of practicing pediatric physiatrists, the growing number of children with disabilities, and the limited access to our services, most pediatric physiatrists are in agreement that it is time to consider the opportunity to expand the PRM workforce by creating a fellowship pathway to subspecialty board certification in PRM after pediatric residency.

Optimizing Dosing of Vagus Nerve Stimulation for Stroke Recovery.

Vagus nerve stimulation (VNS) paired with rehabilitative training enhances recovery of function in models of stroke and is currently under investigation for use in chronic stroke patients. Dosing is critical in translation of pharmacological therapies, but electrical stimulation therapies often fail to comprehensively explore dosing parameters in preclinical studies. Varying VNS parameters has non-monotonic effects on plasticity in the central nervous system, which may directly impact efficacy for stroke. We sought to optimize stimulation intensity to maximize recovery of motor function in a model of ischemic stroke. The study design was preregistered prior to beginning data collection (DOI: https://doi.org/10.17605/OSF.IO/BMJEK ). After training on an automated assessment of forelimb function and receiving an ischemic lesion in motor cortex, rats were separated into groups that received rehabilitative training paired with VNS at distinct stimulation intensities (sham, 0.4 mA, 0.8 mA, or 1.6 mA). Moderate-intensity VNS at 0.8 mA enhanced recovery of function compared with all other groups. Neither 0.4 mA nor 1.6 mA VNS was sufficient to improve functional recovery compared with equivalent rehabilitation without VNS. These results demonstrate that moderate-intensity VNS delivered during rehabilitation improves recovery and defines an optimized intensity paradigm for clinical implementation of VNS therapy.

A limited range of vagus nerve stimulation intensities produce motor cortex reorganization when delivered during training.

Pairing vagus nerve stimulation (VNS) with rehabilitation has emerged as a potential strategy to improve recovery after neurological injury, an effect ascribed to VNS-dependent enhancement of synaptic plasticity. Previous studies demonstrate that pairing VNS with forelimb training increases forelimb movement representations in motor cortex. However, it is not known whether VNS-dependent enhancement of plasticity is restricted to forelimb training or whether VNS paired with other movements could induce plasticity of other motor representations. We tested the hypothesis that VNS paired with orofacial movements associated with chewing during an unskilled task would drive a specific increase in jaw representation in motor cortex compared to equivalent behavioral experience without VNS. Rats performed a behavioral task in which VNS at a specified intensity between 0 and 1.2 mA was paired with chewing 200 times per day for five days. Intracortical microstimulation (ICMS) was then used to document movement representations in motor cortex. VNS paired with chewing at 0.8 mA significantly increased motor cortex jaw representation compared to equivalent behavioral training without stimulation (Bonferroni-corrected unpaired t-test, p < 0.01). Higher and lower intensities failed to alter cortical plasticity. No changes in other movement representations or total motor cortex area were observed between groups. These results demonstrate that 0.8 mA VNS paired with training drives robust plasticity specific to the paired movement, is not restricted to forelimb representations, and occurs with training on an unskilled task. This suggests that moderate intensity VNS may be a useful adjuvant to enhance plasticity and support benefits of rehabilitative therapies targeting functions beyond upper limb movement.

The State of the Field: Results from the 2014 and 2017 Pediatric Rehabilitation Medicine Practice Surveys.

BACKGROUND: Childhood disability is on the rise and there is a national shortage of pediatric physiatrists in the United States. The 2009 Pediatric Rehabilitation Medicine Practice Survey identified concerns regarding inadequate geographic dispersion of providers, salary inequities, and limited academic competitiveness and external funding for research. OBJECTIVE: To describe the current state of the field of pediatric rehabilitation medicine. DESIGN: Survey of pediatric physiatrists in the United States in 2014 and 2017. SETTING: National. PARTICIPANTS: Pediatric physiatrists INTERVENTIONS: Not applicable. MAIN OUTCOME MEASUREMENTS: Characteristics; clinical activities, responsibilities, and comfort; academic activities; and salaries and productivity. RESULTS: In both 2014 and 2017, the majority of pediatric physiatrists who responded were women (~63%) and worked at an academic teaching hospital (~68%). Pediatric physiatrists most commonly held the title of assistant professor and were overrepresented in the Midwest. Overall, 55.8% of providers felt that access was adequate in their area whereas only 3.7% felt access was adequate across the country. In 2017, 52.5% of pediatric physiatrists participated in research or other scholarly activities with 44.2% reporting having published original research at some point in their careers. The inflation adjusted mean salary in 2014 ($227 360) was not statistically different than in 2017 ($232 634, P = .422). In both years, full professors reported the highest academic full-time salaries. Individuals having at least one leadership title also reported significantly higher average full-time salaries than individuals with no titles. CONCLUSIONS: Although gains have been made in terms of academic competitiveness and engagement in research in pediatric physiatry, there are areas of ongoing concern including large geographic practice variations with associated access to care problems, challenges with recruiting physicians to the field, and salary malalignment within the field of PM&R.

Efficient parameters of vagus nerve stimulation to enhance extinction learning in an extinction-resistant rat model of PTSD.

Vagus nerve stimulation (VNS) has shown promise as an adjuvant treatment for posttraumatic stress disorder (PTSD), as it enhances fear extinction and reduces anxiety symptoms in multiple rat models of this condition. Yet, identification of the optimal stimulation paradigm is needed to facilitate clinical translation of this potential therapy. Using an extinction-resistant rat model of PTSD, we tested whether varying VNS intensity and duration could maximize extinction learning while minimizing the total amount of stimulation. We confirmed that sham rats failed to extinguish after a week of extinction training. Delivery of the standard LONG VNS trains (30 s) at 0.4 mA enhanced extinction and reduced anxiety but did not prevent fear return. Increasing the intensity of LONG VNS trains to 0.8 mA prevented fear return and attenuated anxiety symptoms. Interestingly, delivering 1, 4 or 16 SHORT VNS bursts (0.5 s) at 0.8 mA during each cue presentation in extinction training also enhanced extinction. LONG VNS trains or multiple SHORT VNS bursts at 0.8 mA attenuated fear renewal and reinstatement, promoted extinction generalization and reduced generalized anxiety. Delivering 16 SHORT VNS bursts also facilitated extinction in fewer trials. This study provides the first evidence that brief bursts of VNS can enhance extinction training, reduce relapse and support symptom remission using much less VNS than previous protocols. These findings suggest that VNS parameters can be adjusted in order to minimize total charge delivery and maximize therapeutic effectiveness.

Gender-Based Salary Inequities Among Pediatric Rehabilitation Medicine Physicians in the United States.

OBJECTIVE: To assess whether gender inequities exist for pediatric physiatrists and, if affirmative, what factors account for this difference. DESIGN: Cohort study. SETTING: Online REDCap survey administered via e-mail. PARTICIPANTS: Pediatric physiatrists practicing in the United States in 2017. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Respondents reported on their gender, training, practice type and location, leadership positions, years in practice and years at their current location, salary, research, and clinical productivity. RESULTS: Of the 307 surveys sent, 235 individuals responded, yielding a response rate of 76.5%. Pediatric physiatrists who identified as women were more likely to work part-time but were demographically similar to their colleagues who identified as men. The odds of having no leadership role were higher for women (odds ratio=2.17; P=.02) than men. Pediatric physiatrists who identified as men made on average (in US dollars ± SD) 244,798±52,906 annually compared with those who identified as women 224,497±60,756. The average annual difference in full-time salary was $20,311 in favor of those who identified as men (95% confidence interval, $3135-$37,486). The set of predictors in the multivariable model explained about 40% of the total variability in annual full-time salary (R2=0.389; adjusted R2=0.339; F15,197=7.734; P<.001). Gender was not a significant predictor in the model, but model prediction of the salaries of pediatric physiatrists who identified as men was better than model prediction of the salaries of those who identified as women. CONCLUSIONS: Despite representing a majority of the field, pediatric physiatrists who identified as women were paid less than their counterparts who identified as men. The traditional predictors associated with the salaries of men were not enough to explain salary variation among those who identified as women, thereby providing evidence of the importance of intangible and unmeasured aspects of a women's career, such as bias and institutional culture.

The Impact of Spatial Distribution of Pain on Long-Term Trajectories for Chronic Pain Outcomes After Intensive Interdisciplinary Pain Treatment.

OBJECTIVES: Evidence for the effectiveness of intensive interdisciplinary pain treatment (IIPT) for pediatric chronic pain is growing; however, little research has considered factors that contribute to differences in patients' treatment response. The present study utilized multilevel modeling to examine trajectory of change over time in functional disability from clinic assessment to 6-month follow-up in pediatric patients participating in IIPT, considering spatial distribution of pain, coping efficacy, and pain intensity. MATERIALS AND METHODS: Participants included 110 pediatric patients (Mage=14.65, SD=2.37; localized pain, 27.3%; widespread pain, 72.7%) consecutively admitted into IIPT. Patients completed self-report measures of functional disability, pain intensity, and coping efficacy at pretreatment assessment, admission, weekly during IIPT, discharge, and several follow-ups. RESULTS: Analysis identified a model with 3 three-way interactions, including time, time squared, pain intensity, coping efficacy, and pain distribution, on functional disability. The spatial distribution of pain had the greatest impact on treatment trajectory in patients with widespread pain, high pain intensity, and poor coping efficacy; these patients demonstrated greater functional disability compared with patients with localized pain. In addition, patients with widespread pain and poor coping efficacy had the most functional disability across all levels of pain intensity. Patients with localized pain and poor coping efficacy demonstrated initial treatment gains, but evidenced an increase in functional disability at follow-up. DISCUSSION: Overall, spatial distribution of pain, coping efficacy, and pain intensity played an important role in patients' response to treatment. Better understanding of these variables could improve treatment response, particularly for the most severely disabled chronic pain patients.

Vagus nerve stimulation reverses the extinction impairments in a model of PTSD with prolonged and repeated trauma.

We have shown that vagus nerve stimulation (VNS) enhances extinction of conditioned fear and reduces anxiety in rat models of PTSD using moderate stress. However, it is still unclear if VNS can be effective in enhancing extinction of severe fear after prolonged and repeated trauma. Severe fear was induced in adult male rats by combining single prolonged stress (SPS) and protracted aversive conditioning (PAC). After SPS and PAC procedures, rats were implanted with stimulating cuff electrodes, exposed to five days of extinction training with or without VNS, and then tested for extinction retention, return of fear in a new context and reinstatement. The elevated plus maze, open field and startle were used to test anxiety. Sham rats showed no reduction of fear during extensive extinction training. VNS-paired with extinction training reduced freezing at the last extinction session by 70% compared to sham rats. VNS rats exhibited half as much fear as shams, as well as less fear renewal. Sham rats exhibited significantly more anxiety than naive controls, whereas VNS rats did not. These results demonstrate that VNS enhances extinction and reduces anxiety in a severe model of PTSD that combined SPS and a conditioning procedure that is 30 times more intense than the conditioning procedures in previous VNS studies. The broad utility of VNS in enhancing extinction learning in rats and the strong clinical safety record of VNS suggest that VNS holds promise as an adjuvant to exposure-based therapy in people with PTSD and other complex forms of this condition.

Botulinum Toxin: Techniques Within Pediatric Physiatry.

BACKGROUND: Intramuscular botulinum toxin injections are used for treatment of focal spasticity in children, particularly in those with a diagnosis of cerebral palsy. There are a variety of techniques used when performing botulinum toxin injections without clear standards for pediatric providers. OBJECTIVE: To describe current practice techniques for botulinum toxin injections among pediatric physiatrists. DESIGN: Cross-sectional survey using RedCap Software. SETTING: Pediatric physiatrists who perform botulinum toxin injections. PARTICIPANTS: Survey of 307 pediatric physiatrists. METHODS: Analysis of data from the 2017 practice survey of pediatric physiatrists in the United States. MAIN OUTCOME MEASUREMENTS: Physicians were asked the primary botulinum toxin used, common dosing information, the role of localization, and the role of sedation and distraction in their practice. RESULTS: Nearly all pediatric physiatrists use OnabotulinumtoxinA as the primary formulation of botulinum toxin. The maximum dose per body weight used per injection series had a median of 15 units/kilogram and a median maximum total dose of 500 units. Sixty-five percent of pediatric physiatrists report using sedation, of any type, for botulinum toxin injections. When using sedation, the most common primary method was general anesthesia (38.9%), followed by enteral or nasal anxiolytic with the patient awake (26.2%). The most common reported intended injection site for botulinum toxin was "in multiple sites spread throughout the muscle" (67.9%), and then "one site of the muscle at the motor point" (17.1%). Large muscles were injected using primarily anatomic guidance (75.6%) and electromyography (50.8%), and small muscles were primarily completed with electromyography (73.6%) and anatomic guidance (49.2%). CONCLUSION: There is considerable variability present in one common procedure performed by pediatric physiatrists. LEVEL OF EVIDENCE: NA.

Benefits of Methylphenidate for Long-Term Attention Problems After Traumatic Brain Injury in Childhood: A Randomized, Double-Masked, Placebo-Controlled, Dose-Titration, Crossover Trial.

OBJECTIVE: To characterize the benefits and optimal dose of long-acting methylphenidate for management of long-term attention problems after childhood traumatic brain injury (TBI). DESIGN: Phase 2, randomized, double-masked, placebo-controlled, dose-titration, crossover clinical trial. SETTING: Outpatient, clinical research. PARTICIPANTS: Twenty-six children aged 6 to 17 years who were at least 6 months post-TBI and met criteria for attention-deficit hyperactivity disorder (ADHD) at the time of enrollment. OUTCOME MEASURES: Vanderbilt Rating Scale of attention problems, Pittsburgh Side Effects Rating Scale, and vital signs. RESULTS: Among the 26 participants randomized, 20 completed the trial. The mean ages at injury and enrollment were 6.3 and 11.5 years, respectively. Eight participants had a severe TBI. On an optimal dose of medication, greater reductions were found on the Vanderbilt Parent Rating Scale for the medicated condition than for placebo (P = .022, effect size = 0.59). The mean optimal dose of methylphenidate was 40.5 mg (1.00 mg/kg/day). Preinjury ADHD diagnosis status was not associated with a differential medication response. Methylphenidate was associated with weight loss (∼1 kg), increased systolic blood pressure (∼3- to 6-point increase), and mild reported changes in appetite. CONCLUSION: Findings support use of long-acting methylphenidate for management of long-term attention problems after pediatric TBI. Larger trials are warranted of stimulant medications, including comparative effectiveness and combination medication and nonmedication interventions.

Pediatric intramedullary spinal cord tumor outcomes using the WeeFIM scale.

PURPOSE: The Functional Independence Measure for children (WeeFIM) is a user-friendly functional outcomes tool that has been validated across other traditional functional scales. Historically, the significant neurologic and functional deficits of intramedullary spinal cord tumors (IMSCTs) have been monitored by coarse or overbearing functional outcomes tools that make it difficult to measure the slow improvement/decline seen in these patients. This study is the first to report WeeFIM outcomes on a series of IMSCTs with emphasis on an aggressive surgical strategy. METHODS: A retrospective review from 2005 to 2014 was performed for nine patients who underwent resective surgery for intramedullary spinal cord tumors with intraoperative ultrasound and neurophysiologic monitoring. WeeFIM scales were assessed at admission and discharge to evaluate changes in severity of disability and need for assistance. RESULTS: At the time of this submission, 7/9 patients are alive. The mean WeeFIM improvement was 27 points (8-50 points) with a mean WeeFIM efficiency of 2.0 points/day. CONCLUSIONS: The WeeFIM scale is an appropriate and useful scale for measuring postoperative improvements in patients with IMSCTs undergoing aggressive resective surgery. Attention to intraoperative spinal cord monitoring and prevention of spinal column instability may prevent morbidity related to surgery, and functional outcomes do not appear to be compromised by an aggressive surgical approach.

Closed-loop neuromodulation restores network connectivity and motor control after spinal cord injury.

Recovery from serious neurological injury requires substantial rewiring of neural circuits. Precisely-timed electrical stimulation could be used to restore corrective feedback mechanisms and promote adaptive plasticity after neurological insult, such as spinal cord injury (SCI) or stroke. This study provides the first evidence that closed-loop vagus nerve stimulation (CLV) based on the synaptic eligibility trace leads to dramatic recovery from the most common forms of SCI. The addition of CLV to rehabilitation promoted substantially more recovery of forelimb function compared to rehabilitation alone following chronic unilateral or bilateral cervical SCI in a rat model. Triggering stimulation on the most successful movements is critical to maximize recovery. CLV enhances recovery by strengthening synaptic connectivity from remaining motor networks to the grasping muscles in the forelimb. The benefits of CLV persist long after the end of stimulation because connectivity in critical neural circuits has been restored.

Characteristics and Outcomes of Children With Conversion Disorder Admitted to a Single Inpatient Rehabilitation Unit, A Retrospective Study.

BACKGROUND: Conversion disorder (CD) can lead to impaired functioning. Few studies present demographic and outcome data for pediatric patients. Many have had success with rehabilitation; however, further details are not known. OBJECTIVE: To identify characteristics and outcomes of children admitted to a pediatric inpatient rehabilitation program with CD symptoms. DESIGN: Retrospective study. SETTING: Inpatient rehabilitation unit within a large children's hospital. PATIENTS: All patients with diagnosis of CD or functional gait disorder (FGD) during designated time period. METHODS: Data were obtained from chart review and United Data Systems for Medical Rehabilitation. Descriptive statistics and Wilcoxon signed rank tests were used to analyze data. A P value of <.05 was statistically significant. OUTCOME MEASURES: Average length of stay, Functional Independence Measure for Children (WeeFIM) scores, WeeFIM change, WeeFIM efficiency, recommended therapies, number of repeat admissions to the same hospital for conversion disorder symptoms in the 12 months following discharge, and school reentry characteristics. RESULTS: Thirty admissions were identified that met criteria. Before diagnosis, duration of symptoms was 58 ± 145 days, physician visits averaged 1.9 ± 2.1, hospital admissions to the same hospital averaged 0.7 ± 0.9, and absence from school was 6 ± 12 weeks. Overall, 83% exhibited mixed symptoms. Length of inpatient rehabilitation stay was 8.4 ± 4.2 days with WeeFIM score change of 30 ± 11.9 (P <.001). WeeFIM efficiency was 4.8 ± 4.1 points/d. For patients with documented WeeFIM scores at 3 months, all were improved or maintained. More than three-fourths (80%) had no documented readmission to the same hospital for CD symptoms for 1 year after discharge from inpatient rehabilitation. Close to half (47%) returned to school within 1 week of discharge from inpatient rehabilitation (when school was in session). CONCLUSIONS: This study suggests that a multidisciplinary inpatient rehabilitation approach is a potentially effective and efficient treatment for children and adolescents with conversion disorder and leads to sustained functional improvement and return to school after discharge. LEVEL OF EVIDENCE: III.