Assessing the accuracy of neuromuscular ultrasound for inclusion body myositis.

INTRODUCTION: Inclusion body myositis (IBM) can have clinical and electrodiagnostic features similar to other neuromuscular diseases, making it a diagnostic challenge. This prospective study was designed to determine the accuracy of forearm ultrasound for IBM. METHODS: Sixty adults were recruited (15 with IBM, 15 with amyotrophic lateral sclerosis [ALS], 15 with other myopathies, and 15 healthy controls), and each underwent ultrasound of the bilateral forearms (imaging the flexor digitorum profundus and flexor carpi ulnaris muscles). Three clinicians with varying ultrasound expertise assigned a diagnosis of IBM, ALS, other myopathy, or control, based on images alone. RESULTS: Intrarater reliability was moderately strong. Interrater reliability varied based on clinician experience. Sensitivity was 73.33% and 66.67% for the expert raters. Specificity was strong for all 3 clinicians (93.33%, 84.44%, and 91.11%). DISCUSSION: Neuromuscular ultrasound of the forearm is reliable and accurate for the diagnosis of IBM, although sensitivity was higher among experienced clinicians. Muscle Nerve 59:478-481, 2019.

Neuromuscular ultrasound of the brachial plexus: A standardized approach.

Reliable assessment of brachial plexus disorders can be challenging due to the complexity of the anatomy and variation of potential pathology. Electrodiagnostic testing can be both uncomfortable for the patient and inconclusive. Ultrasound can serve as a complement to clinical assessment, electrodiagnostic testing, and other imaging modalities. This study describes a systematic approach for performing neuromuscular ultrasound for suspected pathology in the brachial plexus. The literature regarding techniques for brachial plexus ultrasound was reviewed. A team composed of specialists in neurology, physiatry, anesthesiology, orthopedic surgery, and vascular surgery used this as the basis for describing standardized techniques for performing brachial plexus ultrasound. Four standard views, along with other supplemental views, are described for the evaluation of the brachial plexus. An illustrative case is presented. Ultrasound is a high-resolution point of care diagnostic tool that allows assessment of structural pathology affecting the brachial plexus. Muscle Nerve 58: 618-624, 2018.

Feasibility of Implementation Mapping for Integrative Medical Group Visits.

Objectives: Implementation science is key to translating complementary and integrative health intervention research into practice as it can increase accessibility and affordability while maximizing patient health outcomes. The authors describe using implementation mapping to (1) identify barriers and facilitators impacting the implementation of an Integrative Medical Group Visit (IMGV) intervention in an outpatient setting with a high burden of patients with chronic pain and (2) select and develop implementation strategies utilizing theory and stakeholder input to address those barriers and facilitators. Design: The authors selected a packaged, evidence-based, integrative pain management intervention, the IMGV, to implement in an outpatient clinic with a high burden of patients with chronic pain. The authors used implementation mapping to identify implementation strategies for IMGV, considering theory and stakeholder input. Stakeholder interviews with clinic staff, faculty, and administrators (n = 15) were guided by the Consolidated Framework for Implementation Research. Results: Based on interview data, the authors identified administrators, physicians, nursing staff, and scheduling staff as key stakeholders involved in implementation. Barriers and facilitators focused on knowledge, buy-in, and operational procedures needed to successfully implement IMGV. The implementation team identified three cognitive influences on behavior that would impact performance: knowledge, outcome expectations, and self-efficacy; and three theoretical change methods: cue to participate, communication, and mobilization. Implementation strategies identified included identifying and preparing champions, participation in ongoing training, developing and distributing educational materials, and organizing clinician implementation team meetings. Conclusions: This study provides an example of the application of implementation mapping to identify theory-driven implementation strategies for IMGV. Implementation mapping is a feasible method that may be useful in providing a guiding structure for implementation teams as they employ implementation frameworks and select implementation strategies for integrative health interventions.

Clinical and Ultrasonographic Features of Distal Ulnar Neuropathy: A Review.

Focal ulnar neuropathy at the wrist is a rare but problematic disorder often associated with the unique anatomy of this nerve as it courses through Guyon's canal, a superficial fibro-osseous tunnel in the proximal ulnar palm. The electrophysiologic features of this disorder have been well-characterized, but the sonographic anatomy of the nerve across the wrist and palm has yet to be systematically described in normal and abnormal states. In this review, we describe the basic anatomy and the sonographic appearance of the nerve in the wrist and palm in normals and individuals with pathology. The value of using US in conjunction with electrodiagnostic testing is emphasized as the two tests together provide critical information regarding etiology, predisposing factors, and functional significance. Furthermore, ultrasound is useful as a patient educational tool to promote behavioral changes that assist in nerve recovery when pathology is related to repetitive stress.

The Effects of Selective Muscle Weakness on Muscle Coordination in the Human Arm.

Despite the fundamental importance of muscle coordination in daily life, it is currently unclear how muscle coordination adapts when the musculoskeletal system is perturbed. In this study, we quantified the impact of selective muscle weakness on several metrics of muscle coordination. Seven healthy subjects performed 2D and 3D isometric force target matches, while electromyographic (EMG) signals were recorded from 13 elbow and shoulder muscles. Subsequently, muscle weakness was induced by a motor point block of brachialis muscle. Postblock subjects repeated the force generation tasks. We quantified muscle coordination pre- and postblock using three metrics: tuning curve preferred direction, tuning curve area, and motor modules analysis via nonnegative matrix factorization. For most muscles, the tuning direction for the 2D protocol was not substantially altered postblock, while tuning areas changed more drastically. Typically, five motor modules were identified from the 3D task, and four motor modules were identified in the 2D task; this result held across both pre- and postblock conditions. The composition of one or two motor modules, ones that involved mainly the activation of shoulder muscles, was altered postblock. Our results demonstrate that selective muscle weakness can induce nonintuitive alternations in muscle coordination in the mechanically redundant human arm.