Publications by authors named "John Henley"

Article Synopsis
  • The study investigates how age and orthopedic surgery affect gait kinematics in children with cerebral palsy (CP) over time, focusing on those who can walk (GMFCS I-III).
  • It involved assessing 31 children with spastic CP every three years from ages 4 to 21, measuring changes in their gait profile scores before and after surgery.
  • Findings show that younger children (under 10) benefited more from surgery in improving their gait compared to older children, emphasizing the importance of timely surgical intervention.
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Purpose: Foot deformities are prevalent in children with cerebral palsy, but there is limited research on the progression of foot posture during growth. Our study aimed to evaluate the change in dynamic foot posture in children with cerebral palsy.

Methods: Children with cerebral palsy, aged 17-40 months, were recruited to participate in this Institutional Review Board-approved prospective longitudinal study by having serial foot posture evaluations.

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Background: The Shriners Hospital Upper Extremity Evaluation (SHUEE) is a video-based measure designed to assess upper extremity function in people with cerebral palsy (CP). The SHUEE completes both dynamic positional analysis (DPA; position during functional activities) and spontaneous functional analysis (spontaneous use of the involved limb). Although the SHUEE has been suggested as a measure for planning upper limb interventions and evaluating outcomes, limited evidence of its ability to detect change exists.

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Background: Arthrogryposis multiplex congenita (AMC) is characterized by joint contractures in 2 or more body areas, often resulting in clubfoot deformities that are typically stiffer than those seen in idiopathic clubfoot deformities. While surgery is routinely used to treat clubfoot in AMC, it has a high rate of recurrence and complications. Current literature suggests serial casting (SC) could be useful in treating clubfoot in AMC, though evidence of its effectiveness is limited.

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Article Synopsis
  • The study looked at how two types of hamstring surgery affect walking in children with cerebral palsy, focusing on different movements.
  • One group had surgery on just the medial hamstrings (MHL), while the other group had surgery on both medial and lateral hamstrings (MLHL).
  • Results showed that both surgeries helped improve knee movement, but the way the knees rotated changed more in the long term, especially in kids who had both hamstrings operated on.
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Background: Children with cerebral palsy (CP) at Gross Motor Function Classification System (GMFCS) levels III/IV are at risk for losses in standing function during adolescence and transition to adulthood. Multilevel surgery (MLS) is an effective treatment to improve gait, but its effects on standing function are not well documented. The objectives of our study were to describe standing function in children with CP classified as GMFCS levels III/IV and evaluate change after MLS.

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Aim: To determine how surgical burden and preoperative factors affect the recovery of walking activity after multilevel orthopedic surgery (MLS).

Method: In this retrospective study, inclusion criteria were a diagnosis of cerebral palsy, MLS, and walking activity monitoring using a StepWatch device within 12 months pre-MLS and 24 months post-MLS. The outcome measure was total mean strides per day normalized to age and Gross Motor Function Classification System level.

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Background: Previous studies have looked at the short-term effectiveness of conservative and surgical treatment of children with cerebral palsy (CP), but few have explored the long-term outcomes into adulthood using gait analysis and patient-reported outcome measures.

Research Question: How do gait, mobility, and patient-reported outcomes in adults with CP who received specialized pediatric orthopedic care change from adolescence?

Methods: We identified 645 adults with 1) CP, 2) age 25-45 years, and 3) an adolescent instrumented gait analysis (IGA) at our center. Measurement outcomes included physical examination, IGA, and select domains of the Patient-Reported Outcomes Measurement Information System (PROMIS).

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Background: The longitudinal stability of sagittal gait patterns in diplegic cerebral palsy (CP), stratified using the Rodda classification, is currently unknown.

Research Question: What is the trajectory of sagittal plane gait deformities as defined by the Rodda classification in a large cohort treated with orthopedic surgery guided by gait analysis?

Methods: A retrospective study utilized gait analysis to evaluate sagittal gait parameters before age 8 and after age 15 years. Individual limbs were categorized at each time point according to the Rodda classification based on mean sagittal plane knee and ankle angle during stance.

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Background: This prospective study used instrumented gait analysis, patient-reported outcomes, and portable accelerometers to examine walking activity in adults with cerebral palsy (CP).

Research Question: This study aimed to provide objective data and evaluate factors associated with walking activity in adults with CP.

Methods: Participants with CP (ages 25-45 years) completed instrumented gait analysis and patient-reported outcomes, including the Patient Reported Outcome Measurement Information System (PROMIS) and Satisfaction with Life Score (SWLS), and wore a StepWatch for 8 days.

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Background: Glioblastoma multiforme (GBM) is the most common primary brain tumor in adults, with a median survival of approximately 15 months. Semaphorin 3A (Sema3A), known for its axon guidance and antiangiogenic properties, has been implicated in GBM growth. We hypothesized that Sema3A directly inhibits brain tumor stem cell (BTSC) proliferation and drives invasion via Neuropilin 1 (Nrp1) and Plexin A1 (PlxnA1) receptors.

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Article Synopsis
  • The Ponseti method is a way to treat clubfoot, but it may not work as well for kids with a stiffer type called arthrogryposis.
  • This study looked at how well the Ponseti method worked in 5-year-old kids with either type of clubfoot and compared their results to kids without any problems.
  • They found that both groups had some issues with foot movement, but the kids with arthrogryposis had more difficulty moving around and playing compared to those with idiopathic clubfoot.
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In this retrospective study, children with cerebral palsy underwent a unilateral femoral derotation osteotomy and had a preoperative (PO), short-term postoperative (1-3 years), and a long-term postoperative (≥5 years) gait analysis. Patients were subdivided into groups by the PO pelvic presentation and Gross Motor Function Classification System level. In children with PO pelvic external rotation, femoral derotation osteotomy decreased the hip internal rotation and decreased the pelvic external rotation.

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Following injury, the mammalian spinal cord forms a glial scar and fails to regenerate. In contrast, vertebrate fish spinal cord tissue regenerates significantly to restore function. Cord transection in zebrafish () initially causes paralysis and neural cell death.

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This study evaluated knee hyperextension course in children with cerebral palsy over a 5-year follow-up. Knee hyperextension was identified in 308 knees, of which 97 had follow-up greater than 5 years. Between the tests, 40% of limbs had plantar flexor lengthening (PFL).

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Background: Many skin-mounted three-dimensional multi-segmented foot models are currently in use for gait analysis. Evidence regarding the repeatability of models, including between trial and between assessors, is mixed, and there are no between model comparisons of kinematic results.

Research Question: This study explores differences in kinematics and repeatability between five three-dimensional multi-segmented foot models.

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This study aimed to assess the effects of plantar flexor lengthening (PFL) on dynamic foot pressures of children with cerebral palsy using pedobarographs. Of 97 enrolled, 13 children with 18 legs had PFL. Age at surgery was 4.

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The effect of a continuous intrathecal infusion of baclofen (CITB) was retrospectively studied in 19 ambulatory children with cerebral palsy (aged 12.4±4.9 years at CITB initiation).

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Background: In pedobarography, clinically meaningful comparison of measurements within or between subjects is limited by data variability and measurement error. This study aims to determine the components of the minimal detectable change (MDC) in impulse across all foot regions and the reliability of these measures.

Methods: A convenience sample of foot pressures from 108 visits by normal, healthy subjects aged 2-17 years was studied.

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Agresta, CE, Church, C, Henley, J, Duer, T, and O'Brien, K. Single-leg squat performance in active adolescents aged 8-17 years. J Strength Cond Res 31(5): 1187-1191, 2017-More than 30 million U.

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In populations where walking and/or stopping can be difficult, such as in children with cerebral palsy, the ability to quickly stop walking may be beyond the child's capabilities. Gait termination may be improved with physical therapy. However, without a greater understanding of the mechanical requirements of this skill, treatment planning is difficult.

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Crouched gait is common in children with cerebral palsy (CP), and there are various treatment options. This study evaluated the effectiveness of single-event multilevel surgery including posterior knee capsulotomy or distal femoral extension osteotomy to correct knee flexion contracture in children with CP. Gait analyses were carried out to evaluate gait preoperatively and postoperatively.

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Assessment of gait abnormalities in cerebral palsy (CP) is challenging, and access to instrumented gait analysis is not always feasible. Therefore, many observational gait analysis scales have been devised. This study aimed to evaluate the interobserver reliability, intraobserver reliability, and validity of Edinburgh visual gait score (EVGS).

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Introduction: Multiple sclerosis (MS) is the most common chronic inflammatory, demyelinating disease of the CNS and results in neurological disability. Existing immunomodulatory and immunosuppressive approaches lower the number of relapses but do not cure or reverse existing deficits nor improve long-term disability in MS patients.

Areas Covered: Monogenic antibodies were described as treatment options for MS, however the immunogenicity of mouse antibodies hampered the efficacy of potential therapeutics in humans.

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