Shoulder strength profiles in children with and without brachial PLEXUS PALSY.

INTRODUCTION: We characterized bilateral shoulder strength and the balance of antagonist/agonist muscle pairs in children with brachial plexus palsy (BPP) and with typical development (TD). METHODS: In 15 children with unilateral BPP and 11 with TD, bilateral maximal isometric shoulder strength in flexion/extension, internal/external rotation, and abduction/adduction was recorded using a hand-held dynamometer. Correlation between strength and active range of motion were evaluated using the Mallet score. RESULTS: Children with BPP had strength asymmetry in all muscles, whereas children with TD had significant strength asymmetry for flexors and abductors. In children with BPP, extensors and external rotators were the weakest muscles, leading to sagittal and transverse plane muscle imbalances. Higher strength values were related to better active range of motion. CONCLUSIONS: This study highlights the importance of documenting shoulder strength profiles in children with BPP which may help predict deformity development.

Scapulothoracic and glenohumeral contributions to motion in children with brachial plexus birth palsy.

BACKGROUND: Brachial plexus birth palsy occurs in 0.4 to 4.6 of every 1000 live births, with residual shoulder dysfunction in approximately one third of cases. Clinical measures, such as the Mallet classification, provide no insight into the scapulothoracic and glenohumeral contributions to tested global shoulder movements. This study describes the scapulothoracic and glenohumeral components of shoulder motion during the modified Mallet test. METHODS: Twelve children with Erb's palsy (C5-6) and 8 children with extended Erb's palsy (C5-7) were recruited. The unaffected limbs of 6 subjects were also tested. Locations of markers placed on the thorax, humerus, and scapula were recorded in a neutral position and each of the modified Mallet positions. Scapulothoracic, glenohumeral, and humerothoracic helical displacements and acromion process linear displacements were compared between groups. RESULTS: The brachial plexus birth palsy groups exhibited significantly smaller glenohumeral displacements in all modified Mallet positions and significantly larger scapulothoracic displacements in the global external rotation and hand to mouth positions. Discriminant function analysis using only humerothoracic variables correctly classified 76.9% of subjects. Discriminant function analysis incorporating scapulothoracic, glenohumeral, and acromion process displacement variables produced accuracy of 92.6%. CONCLUSIONS: Children with brachial plexus birth palsy demonstrated decreased glenohumeral contributions to achieve every modified Mallet position and increased scapulothoracic contribution in two positions compared with the unaffected group. Different scapulothoracic and glenohumeral strategies were identified between groups. Finally, scapulothoracic and glenohumeral components of shoulder motion are more specific than humerothoracic measures to diagnostic classification.

Evaluating the acromion marker cluster as a method for measuring scapular orientation in children with brachial plexus birth palsy.

Several studies have described using an acromion marker cluster for measuring scapular orientation in healthy adults performing planar motions. It is unknown whether the acromion marker cluster method will provide the same level of accuracy in children with brachial plexus birth palsy. This study compared this method to palpation for calculating scapular orientation in children with brachial plexus birth palsy performing clinically relevant movements. Scapular orientation in ten patients was determined by palpation and an acromion marker cluster in neutral and six Modified Mallet positions. RMSEs and mean relative errors were calculated. Resultant RMSEs ranged from 5.2 degrees to 21.4 degrees. The averages of the mean relative errors across all positions for each axis were 177.4% for upward/downward rotation, 865.0% for internal/external rotation, and 166.2% for anterior/posterior tilt. The acromion marker cluster method did not accurately measure scapular rotation relative to the total movement on an individual or group basis in the population. With most relative errors over 100%, the acromion marker cluster method often produced errors larger than the actual measured motion. The accuracy of the acromion marker cluster method limits its use as a clinical tool for measuring scapular kinematics on children with brachial plexus birth palsy.

Newborn brachial plexus palsy: evaluation of severity using quantitative ultrasound of muscle.

INTRODUCTION: We studied ultrasound features of muscle after nerve injury. METHODS: We evaluated ultrasound measurements of muscle thickness and backscatter in injured and contralateral uninjured elbow flexors of 51 children with newborn brachial plexus palsy (NBPP) and compared the results to elbow flexor function (Active Movement Scale), defined as normal, moderate, or severe. RESULTS: Compared with uninjured limbs, muscle in injured arms was 15% thinner with severe impairment, 17% thicker with moderate impairment, and no different with normal function. Relative to uninjured limbs, moderately impaired muscle was thicker than both severely impaired and normal strength muscle. Backscatter was higher in injured than in uninjured limbs regardless of function. In 17 patients with sequential measures, muscle thickness, but not backscatter, increased with function over time. CONCLUSIONS: Muscle thickness differentiates moderate from severe impairment after NBPP and increases with recovery over time. Muscle backscatter identifies prior injury regardless of function.

Congenital lower brachial plexus palsy due to cervical ribs.

Congenital brachial plexus palsy (CBPP) usually occurs secondarily to intrapartum trauma, but this is not always the case. Cervical ribs have previously been reported to increase the risk of CBPP in association with birth trauma. We report the cases of two children (one female, one male) with congenital lower brachial plexus palsy in whom the presence of non-ossified cervical ribs was the only identified risk factor. In the female child magnetic resonance imaging (MRI) of the brain, spinal cord, and brachial plexus revealed no abnormality except for the presence of bilateral cervical ribs at the level of the seventh cervical (C7) vertebra. Chest radiography was normal, which suggested that the cervical ribs identified on the MRI were fibrous bands or cartilaginous ribs rather than ossified ribs. In the male child, MRI of the spine and brachial plexus was normal but he was noted to have bilateral cervical ribs at C7. These were not identifiable on chest radiography and, therefore, are likely to reflect fibrous bands or cartilaginous ribs.

[Physiotherapy applied to the upper extremity in 0 to 10-year-old children with obstetric brachial palsy: a systematic review]. / Fisioterapia aplicada en la extremidad superior a niños de 0 a 10 años con parálisis braquial obstétrica: revisión sistemática.

INTRODUCTION: Obstetric brachial palsy is involved with affected upper limb, resulting in permanent structural and function sequelae that limit the motion articular range and reduce independence in daily activities, as well as the children participation in their natural environment. AIM: To describe the physiotherapy treatments currently used to increase the affected upper limb functionality in children from 0 to 10 years diagnosed with obstetric brachial palsy. PATIENTS AND METHODS: A bibliographic search of published studies between 2009 and 2018 was carried out in the PubMed, PEDro, ScienceDirect and The Cochrane Library databases. RESULTS: After applying the inclusion/exclusion criteria, ten studies were obtained with favorable results for the affected upper limb functionality and bone mineralization density, regardless of the technique of choice used during the intervention. The used physiotherapy programs in the different studies such as Constraint Induced movement therapy, kinesiotape, electrotherapy, virtual reality and use of splints or orthotics were analyzed. CONCLUSION: All the described techniques suggest favorable results for the affected upper limb functionality in obstetric brachial palsy from 0 to 10 years.

TITLE: Fisioterapia aplicada en la extremidad superior a niños de 0 a 10 años con parálisis braquial obstétrica: revisión sistemática.Introducción. La parálisis braquial obstétrica cursa con afectación del miembro superior y da lugar a secuelas estructurales y de la función permanentes que limitan el rango articular de movimiento y reducen la independencia en las actividades cotidianas, así como la participación del niño dentro de su entorno natural. Objetivo. Describir los tratamientos de fisioterapia empleados en la actualidad para incrementar la funcionalidad de la extremidad superior afectada en niños de 0 a 10 años diagnosticados de parálisis braquial obstétrica. Pacientes y métodos. Se realizó una búsqueda bibliográfica de los trabajos publicados entre 2009 y 2018 en las bases de datos PubMed, PEDro, ScienceDirect y Cochrane Library. Resultados. Tras aplicar los criterios de inclusión/exclusión, se obtuvieron diez estudios con resultados favorables para la funcionalidad de la extremidad superior afectada y la densidad de mineralización ósea, independientemente de la técnica de elección utilizada durante la intervención. Se analizaron los programas de fisioterapia empleados en los diferentes estudios, como la terapia de movimiento inducido por restricción, el kinesiotape, la electroterapia, la realidad virtual y el uso de férulas u ortesis. Conclusión. Todas las técnicas descritas sugieren resultados favorables para la funcionalidad del miembro superior en niños de 0 a 10 años con parálisis braquial obstétrica.

Obstetric brachial plexus palsy - A prospective, population-based study of incidence, recovery and long-term residual impairment at 10 to 12 years of age.

AIM: To assess the long-term outcome and evaluate prognostic factors in obstetric brachial plexus palsy (OBPP). METHODS: Of all 114 children with OBPP born in western Sweden in 1999-2001, 98 (61 males, 37 females) were invited to participate. A questionnaire on the symptoms of the OBPP was sent out and those with persisting symptoms were examined in terms of muscle strength, range of motion (ROM), activities of daily living (ADL), pain and sensibility at the age of 10-12 years. Contact was made by 87 children. RESULTS: The incidence of persisting OBPP at 10-12 years of age was calculated as 19 per 38,749 live births or 0.49 per 1000. Symptoms were reduced muscle strength and ROM in the arm. Eight children reported pain, four had impaired sensibility and ten children described some difficulties in ADL. Muscle strength in forearm supination, shoulder external rotation and elbow flexion at three months of age can be used to predict outcome. INTERPRETATION: Most children with an OBPP recover completely, but one in five has symptoms of the injury at 10-12 years of age. Muscle strength in the arm at three months of age can be used to predict outcome.

Oberlin transfer compared with nerve grafting for improving early supination in neonatal brachial plexus palsy.

OBJECTIVE The use of nerve transfers versus nerve grafting for neonatal brachial plexus palsy (NBPP) remains controversial. In adult brachial plexus injury, transfer of an ulnar fascicle to the biceps branch of the musculocutaneous nerve (Oberlin transfer) is reportedly superior to nerve grafting for restoration of elbow flexion. In pediatric patients with NBPP, recovery of elbow flexion and forearm supination is an indicator of resolved NBPP. Currently, limited evidence exists of outcomes for flexion and supination when comparing nerve transfer and nerve grafting for NBPP. Therefore, the authors compared 1-year postoperative outcomes for infants with NBPP who underwent Oberlin transfer versus nerve grafting. METHODS This retrospective cohort study reviewed patients with NBPP who underwent Oberlin transfer (n = 19) and nerve grafting (n = 31) at a single institution between 2005 and 2015. A single surgeon conducted intraoperative exploration of the brachial plexus and determined the surgical nerve reconstruction strategy undertaken. Active range of motion was evaluated preoperatively and postoperatively at 1 year. RESULTS No significant difference between treatment groups was observed with respect to the mean change (pre- to postoperatively) in elbow flexion in adduction and abduction and biceps strength. The Oberlin transfer group gained significantly more supination (100° vs 19°; p < 0.0001). Forearm pronation was maintained at 90° in the Oberlin transfer group whereas it was slightly improved in the grafting group (0° vs 32°; p = 0.02). Shoulder, wrist, and hand functions were comparable between treatment groups. CONCLUSIONS The preliminary data from this study demonstrate that the Oberlin transfer confers an advantageous early recovery of forearm supination over grafting, with equivalent elbow flexion recovery. Further studies that monitor real-world arm usage will provide more insight into the most appropriate surgical strategy for NBPP.

Neonatal brachial plexus palsy: obstetric factors associated with litigation.

OBJECTIVE: Our objective was to compare characteristics between neonatal brachial plexus palsy (NBPP) cases that were litigated versus those that were not. STUDY DESIGN: From May to December 2012, the University of Michigan Interdisciplinary Brachial Plexus Program surveyed 51 consecutive families whose children were treated for NBPP. Obstetric data was self-reported. Unless NBPP resolved, children were followed for at least two years. Student's t-test and Chi-square test with odds ratio and 95% confidence intervals were calculated. RESULTS: Among 51 families surveyed, obstetric data were available for 98% (n = 50). Litigation was pursued by 48% (n = 24). Comparing families that litigated versus those that did not, there were no differences in demographics, peripartum characteristics, operative versus spontaneous vaginal birth, shoulder dystocia in current pregnancy (65% versus 54%; p = 0.56) or birth weight above 9 lbs. The number of children having brachial nerve surgery was significantly higher among families that litigated (46%) versus those that did not (8%; p = 0.002). CONCLUSION: Though there were no differences in peripartum events, almost 1 out of 2 children managed by interdisciplinary team had concomitant litigation. The only factor associated with litigation was having brachial nerve surgery. Efforts are warranted to avert NBPP and mitigate litigations.

Etiological risk factors for brachial plexus palsy.

AIM: To investigate risk factors for brachial plexus palsy in newborns. We analyzed 45 544 live-born children, born over a nine-year period from January 1, 1996 to December 31, 2004. METHODS: The analysis was retrospective and based on the medical documentation of the Clinic for Gynecology and Obstetrics, Clinic for Neurology, and Clinic for Physical Medicine and Rehabilitation of the University Clinical Center Tuzla. We compared study and control groups of newborns. Rates among groups were compared using Chi-square, with significance at p < 0.05, and with significance at p < 0.01. RESULTS: Examining epidemiological characteristics, 86 newborns with brachial plexus palsy had been recorded, thus, the prevalence was 1.86 per 1000 live-born children. Analyzing maternal and neonatal factors, and the labor pattern itself, it was found that the highest factors of risk for brachial plexus injury were birth weight of over 4000 g, a precipitous second stage of labor (<15 minutes), and vacuum-extractor assisted labor. Brachial plexus palsy was more frequent when the mothers were overweight, with a body mass index >or=29 kg/m2. None of the parturient women, whose newborns were diagnosed with brachial plexus palsy, had external conjugate diameter <18 cm. Newborns delivered vaginally were not diagnosed with a higher frequency of brachial plexus palsy when compared to newborns who were delivered by cesarean section, but newborns who were vaginal breech-delivered were diagnosed to have a higher incidence of brachial plexus palsy. Newborns whose mothers were older than 35 years were diagnosed to have brachial plexus palsy more frequently, but a statistically significant difference between primiparas and multiparas was not found. A total of 39 newborns (45.2%) were diagnosed with a fracture of the clavicle, which was the most frequently combined damage with brachial plexus injury. Forty-two newborns (48.8%) had an Apgar score of

High prevalence of cranial asymmetry exists in infants with neonatal brachial plexus palsy.

PURPOSE: This study aimed to: 1) evaluate the prevalence of cranial asymmetry (positional plagiocephaly) in infants with neonatal brachial plexus palsy (NBPP); 2) examine the association of patient demographics, arm function, and NBPP-related factors to positional plagiocephaly; and 3) determine percentage of spontaneous recovery from positional plagiocephaly and its association with arm function. METHODS: Infants < 1 year of age with NBPP and no previous exposure to plagiocephaly cranial remolding therapy or surgical intervention were recruited for this prospective cross-sectional study. Positional plagiocephaly (diagonal difference) measurements were captured using a fiberglass circumferential mold of the cranium. Included infants were divided into 2 groups: 1) those with positional plagiocephaly at most recent evaluation (plagio group), including infants with resolved positional plagiocephaly (plagio-resolved subgroup); and 2) those who never had positional plagiocephaly (non-plagio group). Standard statistics were applied. RESULTS: Eighteen of 28 infants (64%) had positional plagiocephaly. Delivery type might be predictive for plagiocephaly. Infants in the non-plagio group exhibited more active range of motion than infants in the plagio group. All other factors had no significant correlations. CONCLUSIONS: A high prevalence of positional plagiocephaly exists among the NBPP population examined. Parents and physicians should encourage infants to use their upper extremities to change position and reduce chance of cranial asymmetry.

Posterior shoulder dislocation in infants with neonatal brachial plexus palsy.

BACKGROUND: Glenoid dysplasia and posterior shoulder subluxation with resultant shoulder stiffness is a well-recognized complication in infants with neonatal brachial plexus palsy. It is generally considered to be the result of a slowly progressive glenohumeral deformation secondary to muscle imbalance, physeal trauma, or both. Recent publications about infantile posterior shoulder dislocation have suggested that the onset of dysplasia occurs at an earlier age than has been previously recognized. The prevalence of early dislocation in infants with this disorder has not been previously reported, to our knowledge. METHODS: We studied 134 consecutive infants with neonatal brachial plexus palsy who were seen at our institution over a period of two years. All infants were examined at monthly intervals to assess neurological recovery and the status of the upper extremity until recovery occurred or a treatment plan was established. The type of brachial plexus involvement was classified. Specific clinical signs associated with subluxation and dislocation were recorded. These included asymmetry of skin folds of the axilla or the proximal aspect of the arm, apparent shortening of the humeral segment, a palpable asymmetric fullness in the posterior region of the shoulder, or a palpable click during shoulder manipulation. The infants who were identified as having these clinical signs were evaluated with ultrasonographic imaging studies. RESULTS: Eleven (8%) of the 134 infants had a posterior shoulder dislocation. The mean age at the time of diagnosis was six months (range, three to ten months). There was no correlation between the occurrence of dislocation and the type of initial neurological deficit. A rapid loss of passive external rotation between monthly examinations indicated a posterior shoulder dislocation. CONCLUSIONS: Posterior shoulder dislocation can occur earlier (before the age of one year) and more rapidly in infants with neonatal brachial plexus palsy than has been appreciated previously. As with developmental dysplasia of the hip, a high index of suspicion, recognition of clinical signs, and the use of ultrasonography will allow the diagnosis to be established. Following early diagnosis, attention should be focused on improving the stability and congruency of the shoulder joint.

Congenital brachial palsy: incidence, causes, and outcome in the United Kingdom and Republic of Ireland.

OBJECTIVES: To determine the incidence and study the causes and outcome of congenital brachial palsy (CBP). DESIGN: Active surveillance of newborn infants using the British Paediatric Surveillance Unit notification system and follow up study of outcome at 6 months of age. SETTING: The United Kingdom and Republic of Ireland. PARTICIPANTS: Newborn infants presenting with a flaccid paresis of the arm (usually one, rarely both) born between April 1998 and March 1999. MAIN OUTCOME MEASURES: Extent of the lesion at birth and degree of recovery at 6 months of age. FINDINGS: There were 323 confirmed cases giving an incidence of 0.42 per 1000 live births (1 in 2300). Significant associated risk factors in comparison with the normal population were shoulder dystocia (60% v 0.3%), high birth weight with 53% infants weighing more than the 90th centile, and assisted delivery (relative risk (RR) 3.4, 95% confidence interval (CI) 2.9 to 3.9, p = 0.0001). There was a considerably lower risk of CBP in infants delivered by caesarean section (RR 7, 95% CI 2 to 56, p = 0.002). At about 6 months of age, about half of the infants had recovered fully, but the remainder showed incomplete recovery including 2% with no recovery. The relative risk of partial or no recovery in infants with extensive lesions soon after birth compared with those with less extensive lesions was 11.28 (95% CI 2.38 to 63.66, p = 0.000005). CONCLUSIONS: The incidence of CBP in the United Kingdom and Republic of Ireland is strikingly similar to that previously reported nearly 40 years ago. Most cases are due to trauma at delivery, which is not necessarily excessive or inappropriate. Given the uncertainty about the appropriate management of these infants, serious consideration should be given to a formal clinical trial of microsurgical nerve repair.

Clinical assessment, MRI, and EMG in congenital brachial plexus palsy.

Thirteen infants with congenital brachial plexus palsy (eight with upper, five with upper and lower) were monitored by magnetic resonance imaging (the first performed between 7 and 41 days of age and the second at 3 months of age), electromyography (the first performed between 27 and 50 days and the second at 3 months), and the muscle scoring system of the Hospital for Sick Children (at 3, 6, and 9 months of age). The findings were evaluated with respect to the clinical status of the patients at 12 months of age. Magnetic resonance imaging, which could be performed readily even in the neonatal period, revealed pseudomeningoceles in two of the five patients with a poor prognosis (in all planes even in the early days after birth) and in two of the eight patients with a good prognosis (more easily visible at 3 months of age). Electromyography implied root avulsion in three of five patients with a poor prognosis. Electromyography can be of great value for patients with a poor prognosis and root avulsion but may underestimate the severity. The muscle scoring system (Hospital for Sick Children) was determined to be the most predictive method for prognosis.

Arthroscopic release of shoulder contracture secondary to birth palsy: an early report on findings and surgical technique.

PURPOSE: Internal rotation contractures are common in children with external rotation weakness secondary to brachial plexus birth palsy. Surgical release of the contracture, with or without latissimus dorsi transfer, is an established treatment through a variety of open methods. This article describes an arthroscopic method of contracture release in this patient population. TYPE OF STUDY: New surgical technique. METHODS: Forty-one children with contractures, ranging in age from 8 months to 12 years (mean, 3.5 years), underwent arthroscopic release of the shoulder with a 2.7-mm arthroscope used for visualization. The release consisted of a subscapularis tenotomy and release of the anterior capsular ligaments. Eighteen children underwent a subscapularis release as an isolated procedure. Twenty-three of the children also underwent latissimus dorsi transfer. RESULTS: Arthroscopic release was successful in achieving at least 45 degrees of passive external rotation at surgery in all but one case. This case was in the oldest child, a 12-year-old with severe deformity, who needed an open release. No other complications were noted. Glenohumeral deformity was common. The primary contracted elements were the subscapularis and the anterior capsular ligaments. CONCLUSIONS: Arthroscopic contracture release was effective in the restoration of passive external rotation in children with internal rotation contractures secondary to birth palsy.

Early functional recovery of elbow flexion and supination following median and/or ulnar nerve fascicle transfer in upper neonatal brachial plexus palsy.

BACKGROUND: Nerve transfers using ulnar and/or median nerve fascicles to restore elbow flexion have been widely used following traumatic brachial plexus injury, but their utility following neonatal brachial plexus palsy remains unclear. The present multicenter study tested the hypothesis that these transfers can restore elbow flexion and supination in infants with neonatal brachial plexus palsy. METHODS: We retrospectively reviewed the cases of thirty-one patients at three institutions who had undergone ulnar and/or median nerve fascicle transfer to the biceps and/or brachialis branches of the musculocutaneous nerve after neonatal brachial plexus palsy. The primary outcome measures were postoperative elbow flexion and supination as measured with the Active Movement Scale (AMS). Patients were followed for at least eighteen months postoperatively unless they obtained full elbow flexion or supination (AMS = 7) prior to eighteen months of follow-up. RESULTS: Twenty-seven (87%) of the thirty-one patients obtained functional elbow flexion (AMS ≥ 6), and twenty-four (77%) obtained full recovery of elbow flexion against gravity (AMS = 7). Of the twenty-four patients for whom recovery of supination was recorded, five (21%) obtained functional recovery. Combined ulnar and median nerve fascicle transfers were performed in five patients and resulted in full recovery of elbow flexion against gravity and supination of AMS ≥ 5 for all five. Single-fascicle transfer was performed in twenty-six patients and resulted in functional flexion in 85% (twenty-two of twenty-six) and functional supination in 15% (three of twenty). Patients with nerve root avulsion were treated at a younger age (p < 0.01), had poorer preoperative elbow flexion (p < 0.01), and recovered greater supination (p < 0.01) compared with patients with dissociative recovery. Younger patients (p < 0.01) and patients with C5-C6 avulsion (p < 0.02) recovered the greatest supination. One patient sustained a transient anterior interosseous nerve palsy after median nerve fascicle transfer. CONCLUSIONS: Ulnar and/or median nerve fascicle transfers were able to effectively restore functional elbow flexion in patients with nerve root avulsion, dissociative recovery, or late presentation following neonatal brachial plexus palsy. Recovery of supination was less, with greater success noted in younger patients with nerve root avulsion.

An assessment of the compliance and utility of a home exercise DVD for caregivers of children and adolescents with brachial plexus palsy: a pilot study.

OBJECTIVE: To investigate the impact of a video-based educational resource on home exercise compliance among caregivers of children with neonatal brachial plexus palsy (NBPP). DESIGN: Retrospective analysis of self-reported caregiver home exercise habits and resultant shoulder range of motion (ROM) and biceps power in patients with NBPP. SETTING: Home-based exercise program. PARTICIPANTS: Adult caregivers of children with NBPP followed up through the Brachial Plexus Program at the University of Michigan (N = 83 surveyed initially, with N = 37 completing the final survey). METHODS: Caregivers completed surveys before and approximately 3, 6, and 12 months (times A, B, and C, respectively) after receiving the "Home Exercise Therapy Program for Brachial Plexus Palsy" digital video disk (DVD). A retrospective analysis of shoulder ROM and biceps power of patients was completed as representative of arm function during the study. MAIN OUTCOME MEASUREMENTS: Surveys assessed home exercise compliance, resources used to guide exercises, and caregiver confidence in the correctness of exercises being performed. Functional outcomes analyzed include biceps strength and shoulder active and passive ROM. RESULTS: Home exercise compliance increased from 74% initially to 96% at time A (P < .001), remained at 94% at time B (P < .001), and fell to 84% at time C (P = .016). Use of the DVD to guide home exercise decreased from 69% at time A to 57% at time B and C (P = .026). After receiving the DVD, exercise frequency and caregiver confidence increased. Although some measures of shoulder active ROM and biceps power improved during the course of the study, there was no consistent statistically significant relationship between increased caregiver confidence and functional outcomes. No causal relationship exists between DVD content and functional status at this time. CONCLUSIONS: As the first formal evaluation of a video-based resource guiding exercise therapy for children with NBPP, we suggest that this population may be receptive to alternative media and may benefit from dynamic modeling of home exercises.