Telehealth-Enabled In-Home Elbow Rehabilitation for Brachial Plexus Injuries Using Deep-Reinforcement-Learning-Assisted Telepresence Robots.

Due to damage to the network of nerves that regulate the muscles and feeling in the shoulder, arm, and forearm, brachial plexus injuries (BPIs) are known to significantly reduce the function and quality of life of affected persons. According to the World Health Organization (WHO), a considerable share of global disability-adjusted life years (DALYs) is attributable to upper limb injuries, including BPIs. Telehealth can improve access concerns for patients with BPIs, particularly in lower-middle-income nations. This study used deep reinforcement learning (DRL)-assisted telepresence robots, specifically the deep deterministic policy gradient (DDPG) algorithm, to provide in-home elbow rehabilitation with elbow flexion exercises for BPI patients. The telepresence robots were used for a six-month deployment period, and DDPG drove the DRL architecture to maximize patient-centric exercises with its robotic arm. Compared to conventional rehabilitation techniques, patients demonstrated an average increase of 4.7% in force exertion and a 5.2% improvement in range of motion (ROM) with the assistance of the telepresence robot arm. According to the findings of this study, telepresence robots are a valuable and practical method for BPI patients' at-home rehabilitation. This technology paves the way for further research and development in telerehabilitation and can be crucial in addressing broader physical rehabilitation challenges.

A favourable suture method for size-mismatched nerve transfer: a case series of intercostal-to-musculocutaneous nerve transfer for brachial plexus injury.

We review a nerve suture method for size-mismatched nerve transfers and report a case series involving patients with brachial plexus injury who underwent intercostal-to-musculocutaneous nerve transfer using this method.

Impact of disability in the quality of life of patients with traumatic brachial plexus injuries based on a questionnaire survey in a tertiary center in South India.

Objectives: The aim of the study was to assess the disability and its impact in the health-related quality of life (HRQOL) and its various domains in patients with traumatic brachial plexus injury (TBPI). Materials and Methods: A descriptive cross-sectional questionnaire survey was conducted on 41 patients with TBPI in a tertiary care center in South India. The assessment of disability and HRQOL was done as per the guidelines of the Gazette of India (2001) and WHO BREF questionnaire, respectively. The association between disability and HRQOL was determined using Chi-square test. Results: All patients were males in the age group 16-60 years (mean age 36.8 ± 14.4 years). Etiology was road traffic accident in 90.2% of cases. About 51.2% had pan-plexus injuries and 53.7% had their dominant limb affected. The mean total disability was 80.39 ± 13.86% and the mean total HRQOL score was 188.46 ± 83.44 out of 400. It was found that disability due to TBPI significantly reduced the HRQOL (Fisher's exact P = 0.005) and the psychological domain was the most significantly affected (P = 0.017, Kruskal-Wallis test). Pan-plexus injuries with an involvement of dominant upper limb had significant impact in the HRQOL. Twenty-one patients (51.2%) complained of neuropathic pain and they had a significantly reduced quality of life (QOL) (mean QOL = 23.3, P < 0.001). It was also found that productive age group (26-55 years) had a significantly reduced QOL as compared to the extreme age groups (P = 0.000). Unemployed patients had a significantly reduced QOL as compared to those with permanent/temporary job (P = 0.024). Marital status was found to have no significant relationship with the total HRQOL (P = 0.647). Those belonging to the poor socioeconomic strata (below poverty line) had poor HRQOL as compared to those above poverty line and the relationship was found to be significant (P = 0.000). Conclusion: TBPIs significantly affected all domains of QOL, especially in unemployed patients in the productive age group in the poor socioeconomic strata. The pan-brachial plexus involvement of dominant upper limb and associated neuropathic pain were the most important factors which negatively affected the QOL. Among the codomains of the QOL, psychological domain was the most significantly affected irrespective of the severity of the injury.

Preganglionic Injury of C8 Nerve Root Secondary to Shoulder Disloca tion: Diagnosis based on MRI Findings.

INTRODUCTION: Traumatic spinal root injury caused by shoulder dislocation may involve the brachial plexus or, in some cases, a single nerve. The degree of severity of the injury depends on many patient-specific factors as well as the mechanism of injury. It is essential to suspect this type of lesion by means of a thorough physical examination in order to have better patient outcomes. CASE PRESENTATION: We presented the subtle magnetic resonance imaging (MRI) findings in a 35-yearold male with left shoulder trauma and dislocation after falling off a bicycle. He complained of decreased muscle strength and sensitivity in the C8 dermatome. Atrophy of the hypothenar region and flexion deformity of the 4th and 5th digits were noted. Magnetic resonance imaging findings were consistent with a partial preganglionic C8 motor root lesion. We found T2 increased signal intensity and thinning of the intradural segment of the C8 motor nerve root and low signal in the sequence of a multi- echo gradient recalled echo (GRE). CONCLUSION: MRI is a noninvasive tool that allows a detailed anatomical characterization of the nerves. In brachial plexus injuries, the use of the GRE sequence is useful to identify the lesions, even if they are subtle; however, some lesions may go unnoticed. It is important to note that these patients require an interdisciplinary group to reach a correct diagnosis, which is vital to establish the appropriate treatment and follow-up.

Posterior division of ipsilateral C7 transfer to C5 for shoulder abduction limitation.

Background: Reparation of C5 by proximal selective ipsilateral C7 transfer has been reported for the treatment of neurogenic shoulder abduction limitation as an alternative to the reparation of the suprascapular nerve (SSN) and the axillary nerve (AXN) by distal nerve transfers. However, there is a lack of evidence to support either strategy leading to better outcomes based on long-term follow-up. Objective: The purpose of the study was to investigate the safety and long-term outcomes of the posterior division of ipsilateral C7 (PDIC7) transfer to C5 in treating neurogenic shoulder abduction limitation. Methods: A total of 27 cases with limited shoulder abduction caused by C5 injury (24 cases of trauma, 2 cases of neuritis, and 1 case of iatrogenic injury) underwent PDIC7 transfer to the C5 root. A total of 12 cases (11 cases of trauma and 1 case of neuritis) of C5 injury underwent spinal accessory nerve (SAN) transfer to SSN plus the triceps muscular branch of the radial nerve (TMBRN) transfer to AXN. The patients were followed up for at least 12 months for muscle strength and shoulder abduction range of motion (ROM). Results: In cases that underwent PDIC7 transfer, the average shoulder abduction was 105.9° at the 12-month follow-up. In total, 26 of 27 patients recovered at least M3 (13 reached M4) (Medical Research Council Grading) of the deltoid. In cases that underwent SAN transfer to SSN plus TMBRN to AXN, the average shoulder abduction was 84.6° at the 12-month follow-up. In total, 11 of 12 patients recovered at least M3 (4 reached M4) of the deltoid. Conclusion: Posterior division of ipsilateral C7 transfer is a one-stage, safe, and effective surgical procedure for patients with neurogenic shoulder abduction limitation.

Staged Phrenic Nerve Elongation and Free Functional Gracilis Muscle Transplantation-A Possible Option for Late Reconstruction in Chronic Brachial Plexus Injury.

PURPOSE: In patients with late brachial plexus birth injuries, sequelae after acute flaccid myelitis, or chronic adult brachial plexus injury, donor nerves for functioning muscle transplantation are often scarce. We present the results of a potential strategy using the phrenic nerve with staged free gracilis transplantation for upper extremity reanimation in these scenarios. METHODS: A retrospective review was performed on an institutional database of brachial plexus injury or patients with palsy. All patients underwent a staged reconstruction in which the ipsilateral phrenic nerve was extended by an autogenous nerve graft (PhNG), followed by free-functioning gracilis transplantation (PhNG-gracilis). RESULTS: Nine patients (6 cases of late brachial plexus birth injuries, 2 of acute flaccid myelitis, and 1 of adult chronic brachial plexus injury) were included in this study. The median follow-up period following the PhNG-gracilis procedure was 27 months (range, 12-72 months). The goals of the staged PhNG and PhNG-gracilis were primarily finger extension or finger flexion. In some patients, the technique was used to improve both elbow and finger function, tunneling the muscle through the flexor compartment of the upper arm and under the mobile wad at the elbow. All patients exhibited improvement of muscle strength, including in finger extension (4 patients) from M0 to M2; finger flexion (3 patients) from M0 to M3; elbow extension (1 patient) from M0 to M2; and elbow flexion (1 patient) from M2 to M4. CONCLUSIONS: A 2-stage PhNG-gracilis may restore or enhance the residual elbow and/or finger paralysis in chronic brachial plexus injuries. A minimum follow-up period of 3 years is recommended. This technique may remain useful as one of the last reconstructive options to increase power in patients with scarce donor nerves. TYPE OF STUDY/LEVEL OF EVIDENCE: Therapeutic V.

Magnetic Resonance as a Method for Diagnosis for Traumatic Lesions by Brachial Plexus Avulsion.

Objective The incidence of traumatic brachial plexus injuries has been increasing considerably in Brazil, mainly due to the increase in the number of motorcycle accidents. The aim of the present study is to evaluate the sensitivity and specificity of magnetic resonance imaging (MRI) in the diagnosis of brachial plexus avulsion lesions, comparing it with the findings of physical and intraoperative examination. Methods A total of 16 patients with brachial plexus injury were prospectively evaluated and treated at the hand surgery outpatient clinic from our service. All patients underwent MRI of the brachial plexus, and the findings were inserted on a table, as well as the physical examination data, and part of the patients had the plexus evaluated intraoperatively. Results In the present study, the accuracy of MRI in the identification of root avulsion was 100%, with 100% sensitivity and specificity when comparing imaging with surgical findings. Conclusion Magnetic resonance imaging showed high sensitivity and specificity, confirmed by intraoperative findings, which allows considering this test as the gold standard in the diagnosis of avulsion in traumatic brachial plexus injuries.

Magnetic Resonance as a Method for Diagnosis for Traumatic Lesions by Brachial Plexus Avulsion / Ressonância magnética como método para diagnóstico das lesões traumáticas por avulsão do plexo braquial

Abstract Objective The incidence of traumatic brachial plexus injuries has been increasing considerably in Brazil, mainly due to the increase in the number of motorcycle accidents. The aim of the present study is to evaluate the sensitivity and specificity of magnetic resonance imaging (MRI) in the diagnosis of brachial plexus avulsion lesions, comparing it with the findings of physical and intraoperative examination. Methods A total of 16 patients with brachial plexus injury were prospectively evaluated and treated at the hand surgery outpatient clinic from our service. All patients underwent MRI of the brachial plexus, and the findings were inserted on a table, as well as the physical examination data, and part of the patients had the plexus evaluated intraoperatively. Results In the present study, the accuracy of MRI in the identification of root avulsion was 100%, with 100% sensitivity and specificity when comparing imaging with surgical findings. Conclusion Magnetic resonance imaging showed high sensitivity and specificity, confirmed by intraoperative findings, which allows considering this test as the gold standard in the diagnosis of avulsion in traumatic brachial plexus injuries.

Resumo Objetivo A incidência de lesões traumáticas do plexo braquial vem aumentando consideravelmente no Brasil, principalmente devido ao aumento do número de acidentes de motocicleta. O objetivo do presente estudo é avaliar a sensibilidade e a especificidade da ressonância magnética (RM) no diagnóstico das lesões por avulsão do plexo braquial, comparando com os achados do exame físico e do intraoperatório. Métodos Foram avaliados prospectivamente 16 pacientes com lesão do plexo braquial atendidos no ambulatório de cirurgia da mão de nosso serviço. Todos os pacientes foram submetidos ao exame de RM do plexo braquial e os achados foram inseridos em uma tabela, assim como os dados do exame físico, e parte dos pacientes teve o plexo avaliado intraoperatoriamente. Resultados No presente estudo, a acurácia da RM na identificação de avulsão de raízes foi de 100%, com 100% de sensibilidade e especificidade comparando-se achados da imagem e cirúrgicos. Conclusão A RM mostrou alta sensibilidade e especificidade, confirmadas por achados intraoperatórios, o que permite considerar este exame como padrão outro no diagnóstico de avulsão nas lesões traumáticas do plexo braquial.

Patient Characteristics Associated with Operative Treatment for Adult Traumatic Brachial Plexus Injuries at Two Tertiary Referral Hospitals in a Single US Metropolitan Area.

Background: The primary objective of this study was to identify patient-related and socioeconomic factors associated with the operative treatment of adult traumatic brachial plexus injuries (BPI) at two tertiary referral centres in a single metropolitan area in the United States. The secondary objective was to assess surgeon variability in operative treatment. Methods: Adult patients with traumatic BPI at two tertiary referral centres in a single metropolitan area from 2015 to 2019 were retrospectively identified. After applying exclusion criteria, 84 adult patients with traumatic BPI treated by 22 surgeons were included. Our response variable was operative treatment of the traumatic BPI. Bi-variate screen was performed, and multi-variable logistic regression analysis was used to identify factors associated with operative treatment. Surgeon variability was separately assessed using Fisher's exact test. Results: The mean age of the study cohort was 45 years, and 69% were male. The most common BPI pattern was a global injury (39%) followed by an upper trunk injury (23%). Thirty-eight patients (45%) underwent operative treatment for the traumatic BPI. Multivariable logistic regression analysis showed that younger age and out-of-state referral were associated with operative treatment. There was significant surgeon variation in the utilisation of operative treatment. Conclusions: Out-of-state patients had more than four times higher odds of operative treatment, suggesting a regional practise pattern in which BPI requiring surgery are referred from surrounding states to our tertiary centres. Supra-regional BPI centres may facilitate timely referrals for specialty care. High-quality outcomes research in BPI is needed to mitigate surgeon treatment variation. Level of Evidence: Level IV (Therapeutic).

Discussions About Obstetric Brachial Plexus Injuries.

Although patients with obstetric brachial plexus injuries (OBPI) have been recognized and treated for greater than 100 years there is much that is not understood or is mis-understood. I address 6 areas for discussion: the cause of OBPI and whether it matters to nerve surgeons; the value of the Narakas grading; whether surgeons should perform primary nerve surgery, especially in patients with incomplete OBPI; the cause and treatment of shoulder tightness; the cause and treatment of elbow contracture; and whether patients with OBPI need surgery in adulthood.

The Demography of Traumatic Brachial Plexus Avulsion Injuries.

Background and objective Brachial plexus injuries more commonly affect the younger generation who constitute the productive workforce. The patients who sustain avulsion injuries of the brachial plexus are more often involved in high-velocity accidents. The avulsion injuries are surgically managed by nerve transfers. This study aimed to evaluate the demography of brachial plexus avulsion injuries. Materials and methods This retrospective study was conducted in January 2013 and included 21 patients treated from January 2007 to December 2011. Results Of the 21 patients, 20 were male and the most commonly affected patients were in the age group of 21-30 years. The mean age of the affected patients was 27.24 years. Six of the patients had pan palsy (C5-8 and T1), nine had C5-7 injury, and six had C5-6 injury. Twenty patients underwent spinal accessory to suprascapular nerve transfer, nine patients underwent ulnar nerve fascicle to nerve to biceps branch transfer, and one patient underwent intercostal nerve to musculocutaneous nerve transfer. Of note, 40% of the patients regained more than M3 power for abduction and external rotation of the shoulder, and 30% of the patients regained more than M3 power for elbow function. Conclusions Road traffic accidents are the most common cause of brachial plexus injuries. Nerve transfers for shoulder and elbow function play a significant role in improving the function of the upper extremity.

Traumatic open brachial plexus injuries: The importance of interdisciplinary collaboration.

Open traumatic brachial plexus injuries are rare, yet can be life threatening and require rapid clinic assessment. Early interdisciplinary collaboration is critical to achieve superior patient outcomes. This case of a 24-year-old female of a traumatic neck injury with contralateral brachial plexus injury demonstrates the limitations of early clinical assessment due to the potential for haemodynamic instability and highlights the priority of patient stabilisation. Early and active interdisciplinary collaboration in this case demonstrates its importance in accurate diagnosis and timely intervention to achieve better patient outcomes. As published in recent guidelines, this report shows the importance of early interdisciplinary involvement following stabilisation and resuscitation of the patient.

Effective long-term management of brachial plexus injury following surgery: What is needed from hand therapists' perspectives.

INTRODUCTION: Traumatic, brachial plexus injuries (BPI) result represent a significant cost to the individual and society. Recovery involves multiple surgeries, takes years, and often results in permanent physical dysfunction. While the last couple of decades have seen advancements in surgical management, the BPI rehabilitation literature has not kept pace with these developments. PURPOSE: We aim to explore the experience of public and privately employed hand therapists' in delivering effective long-term rehabilitation services to inviduals with BPI in Australia. METHODS: An interpretative qualitative study. Two focus groups were conducted with Australian hand therapists' (n = 10). Data were analyzed using an inductive thematic approach. RESULTS: Three key themes were generated from the data. The first theme 'Falling through the gaps: overlooked components of therapy for BPI' captures participants' thoughts on postinjury health care and rehabilitation services. The second 'Developing a therapeutic alliance: underpinned by time and trust' relates to the relationship building challenges and opportunities following trauma that will withstand the long-term recovery of individuals following BPI. The last theme, 'Factors required for professional development: knowledge and support,' considers the variation seen with these clients in relation to therapy needs and outcomes. CONCLUSIONS: The findings of this study highlight the need to better equip hand therapists' skills and knowledge in responding to pain and psychological management post BPI. Our results reinforce the benefit of interdisciplinary models of care in the management of individuals with BPI.

Brachial plexus bridging with specific extracellular matrix-modified chitosan/silk scaffold: a new expand of tissue engineered nerve graft.

Objective.Brachial plexus injuries (BPIs) result in serious dysfunction, especially brachial plexus defects which are currently treated using autologous nerve graft (autograft) transplantation. With the development of tissue engineering, tissue engineered nerve grafts (TENGs) have emerged as promising alternatives to autografts but have not yet been widely applied to the treatment of BPIs. Herein, we developed a TENG modified with extracellular matrix generated by skin-derived precursor Schwann cells (SKP-SCs) and expand its application in upper brachial plexus defects in rats.Approach.SKP-SCs were co-cultured with chitosan neural conduits or silk fibres and subjected to decellularization treatment. Ten bundles of silk fibres (five fibres per bundle) were placed into a conduit to obtain the TENG, which was used to bridge an 8 mm gap in the upper brachial plexus. The efficacy of this treatment was examined for TENG-, autograft- and scaffold-treated groups at several times after surgery using immunochemical staining, behavioural tests, electrophysiological measurements, and electron microscopy.Main results.Histological analysis conducted two weeks after surgery showed that compared to scaffold bridging, TENG treatment enhanced the growth of regenerating axons. Behavioural tests conducted four weeks after surgery showed that TENG-treated rats performed similarly to autograft-treated ones, with a significant improvement observed in both cases compared with the scaffold treatment group. Electrophysiological and retrograde tracing characterizations revealed that the target muscles were reinnervated in both TENG and autograft groups, while transmission electron microscopy and immunohistochemical staining showed the occurrence of the superior myelination of regenerated axons in these groups.Significance.Treatment with the developed TENG allows the effective bridging of proximal nerve defects in the upper extremities, and the obtained results provide a theoretical basis for clinical transformation to expand the application scope of TENGs.

Surgical Management of Traumatic Brachial Plexus Injuries in the Pediatric Population.

OBJECTIVE: To evaluate demographics, treatment options, and outcomes of traumatic brachial plexus injuries in pediatric patients. METHODS: Traumatic brachial plexus reconstructions in patients ≤17 years old were reviewed. Patients were stratified into pan-plexus and incomplete plexus injuries. Functional outcomes (modified British Medical Research Council grade) were reviewed after a minimum follow-up of 9 months. RESULTS: Brachial plexus reconstruction was performed in 71 patients at a mean age of 13.9 years (range, 2-17 years). Approximately half of the patients had a pan-brachial plexus injury (n = 33, 46.5%) with 59.2% having at least 1 preganglionic avulsion injury. Among the 25 patients with pan-brachial plexus injuries who had >9 months of follow-up, 12 (48%), 24 (96%), and 17 (68%) had reconstruction surgery for shoulder, elbow, and grasp function, respectively. At last follow-up, 50%, 83%, and 29% of these patients had a modified British Medical Research Council grade ≥3 in shoulder abduction, elbow flexion, and grasp, respectively. Of the 31 patients with incomplete brachial plexus injuries, 28 (90%) underwent reconstruction for shoulder function, and 13 (42%) underwent surgery for elbow flexion. At last follow-up, 71% and 100% of patients had modified British Medical Research Council grade 3 in shoulder abduction and elbow flexion, respectively. CONCLUSIONS: Pediatric traumatic brachial plexus injuries are often high-energy injuries resulting in nerve root avulsions. Most patients were able to regain antigravity elbow flexion or stronger after brachial plexus reconstruction, and more than half had similar improvement in shoulder function. Treatment should be directed with goals of elbow flexion, shoulder stability/external rotation, and rudimentary grasp.

Short and long-term complications due to standard and extended prone position cycles in CoViD-19 patients.

OBJECTIVE: To investigate short and long-term complications due to standard (≤24 hours) and extended (>24 hours) prone position in COVID-19 patients. METHODS: Retrospective cohort study conducted in an Italian general intensive care unit. We enrolled patients on invasive mechanical ventilation and treated with prone positioning. We recorded short term complications from the data chart and long-term complications from the scheduled follow-up visit, three months after intensive care discharge. RESULTS: A total of 96 patients were included in the study. Median time for each prone positioning cycle (302 cycles) was equal to 18 (16-32) hours. In 37 (38%) patients at least one cycle of extended pronation was implemented. Patients with at least one pressure sore due to prone position were 38 (40%). Patients with pressure sores showed a statistically significative difference in intensive care length of stay, mechanical ventilation days, numbers of prone position cycles, total time spent in prone position and the use of extended prone position, compared to patients without pressure sores. All lesions were low grade. Cheekbones (18%) and chin (10%) were the most affected sites. Follow-up visit, scheduled three months after intensive care discharge, was possible in 58 patients. All patients were able to have all 12 muscle groups examined using theMedical Research Council scale examination. No patient reported sensory loss or presence of neuropathic pain for upper limbs. CONCLUSIONS: Extended prone position is feasible and might reduce the workload on healthcare workers without significant increase of major prone position related complications.

Rotura del tendón largo del bíceps braquial: resultado tras 15 años de evolución / Long tendon rupture of the biceps brachii: result after 15 years of evolution

RESUMEN 15. La rotura de la porción larga del tendón del bíceps produce dificultades para la función del miembro superior y la estética del brazo. Se presenta un paciente con rotura de tendón largo del bíceps, que fue tratado hace 15 años con tratamiento quirúrgico; se muestra desde su lesión y tratamiento hasta la recuperación total y sus condiciones actuales. El siguiente trabajo tiene como objetivo la presentación de un paciente, el cual fue atendido en el Hospital General Provincial Universitario «Mártires del 9 de Abril», en Sagua la Grande, por una rotura de la porción larga de bíceps en el año 2005. Se utilizó una forma de anclaje al hueso diferente a la clásica descrita en la literatura, con excelente resultado. Tras 15 años, se expone el caso y se detalla la evolución posterior, se valora la función actual y se aporta conocimiento interesante para los profesionales que tratan esta afección.

ABSTRACT 19. Rupture of the long head of the biceps tendon causes difficulties for upper limb function and arm aesthetics. We present a male patient with a rupture of the long biceps tendon, who was treated 15 years ago with surgical treatment; he is shown from his injury and treatment to his full recovery and current condition. The aim of the following work is to present a patient who was treated at "Mártires del 9 de Abril" Provincial General University Hospital, in Sagua la Grande, due to a rupture of the long head of the biceps in 2005. A form of bone anchorage, different from the classic one described in the literature, was used with excellent results. After 15 years, the case is presented and the subsequent evolution is detailed, the current function is assessed and interesting knowledge is provided for professionals who treat this condition.

Morphological basis of radial nerve dysfunction in newborns differs from that of no radial nerve dysfunction in adults in C5-C6-C7 injuries to the brachial plexus: a cadaveric study.

OBJECTIVE: Injuries to the upper and middle trunks of brachial plexus result in dysfunction of radial nerves in newborns but do not in adults. We hypothesized that the radial nerve had a lower proportion of myelinated nerve fibers (MNFs) from the lower trunk in newborns than in adults, and in newborns those MNFs were less developed than MNFs in the radial nerve from the middle and upper trunks. METHODS: We dissected bilateral brachial plexus of six newborn and six adult cadavers. The radial nerve and its fascicles were separated proximally to posterior divisions of the upper, middle and lower trunks, and fascicles of the radial nerve were harvested from three trunks to calculate respective percentage of MNFs accounting for the total number of MNFs in the radial nerve. We determined diameters of axons and g-ratios of MNFs in the radial nerve from three trunks. RESULTS: Compared with adults, the percentage of MNFs in the radial nerve from the lower trunk was lower (p < 0.05), from the middle trunk higher (p < 0.05) and from the upper trunk similar (p > 0.05) in newborns, though MNF counts from three trunks were higher in newborns, respectively (p < 0.01, all). In newborns, MNFs in the radial nerve from the lower trunk had smaller axonal diameters and higher g-ratios than those from the middle and upper trunks (p < 0.017, all), while in adults there were no such differences. CONCLUSIONS: Lower proportion of MNFs in the radial nerve from the lower trunk in newborns than in adults, and in newborns immaturity of MNFs from the lower trunk relative to MNFs from the middle and upper trunks may be the major morphological basis of difference in clinical appearances of radial nerve palsy caused by injuries to C5-C6-C7 between newborns and adults.

Functional Evaluation of Levator Scapulae Tendon to Supraspinatus in Adult Brachial Plexus Injuries.

Introduction Brachial plexus injuries are severe life-altering injuries. The surgical method to restore shoulder abduction in adult upper brachial plexus injuries involves the usage of nerve grafts and nerve transfers targeting the suprascapular and/or the axillary nerve. When the primary nerve surgery has been unsuccessful or recovery has been incomplete or with a late presentation, muscle transfer procedures are needed to provide or improve shoulder abduction. Levator scapulae to supraspinatus is a transfer to improve shoulder abduction in posttraumatic brachial plexus injuries. Material and Methods The study included 13 patients with the age ranging from 17 to 47 years with a mean age of 30 years. All these patients had preop shoulder abduction of Medical Research Council (MRC) grade ≤3. All had a minimum of MRC grade 4 of active elbow flexion. Eleven patients had primary surgery. Only patients with a minimum of 1 year postoperative follow-up were included. All 13 patients underwent levator scapulae transfer only. Results All patients had a stable shoulder postoperatively. The average increase in active shoulder abduction was from 6.15°(median: 0°) preoperatively to 61.92°(median: 60°), with an average gain in shoulder abduction of 49.61°(median: 50°). Conclusions Transfer of levator scapulae tendon to the supraspinatus is an option to improve shoulder abduction in posttraumatic brachial plexus. In conditions where supraspinatus alone is not functioning, levator scapulae is the best available transfer, considering its strength and maintaining the form of the shoulder unlike trapezius transfer. In patients with previous surgery where supraspinatus has recovered partially but not functionally significant, this tendon transfer can be considered for the augmentation of the existing shoulder abduction.

Brachial Plexus Injuries - Review of the Anatomy and the Treatment Options.

Brachial plexus injuries are still challenging for every surgeon taking part in treating patients with BPI. Injuries of the brachial plexus can be divided into injuries of the upper trunk, extended upper trunk, injuries of the lower trunk and swinging hand where all of the roots are involved in this type of the injury. Brachial plexus can be divided in five anatomical sections from its roots to its terminal branches: roots, trunks, division, cords and terminal branches. Brachial plexus ends up as five terminal branches, responsible for upper limb innervation, musculocutaneous, median nerve, axillary nerve, radial and ulnar nerve. According to the findings from the preoperative investigation combined with clinically found functional deficit, the type of BPI will be confirmed and that is going to determine which surgical procedure, from variety of them (neurolysis, nerve graft, neurotization, arthrodesis, tendon transfer, free muscle transfer, bionic reconstruction) is appropriate for treating the patient.