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Electrodiagnostic

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https://www.readbyqxmd.com/read/28521265/optimizing-the-electrodiagnostic-accuracy-in-guillain-barr%C3%A3-syndrome-subtypes-criteria-sets-and-sparse-linear-discriminant-analysis
#1
Antonino Uncini, Luigi Ippoliti, Nortina Shahrizaila, Yukari Sekiguchi, Satoshi Kuwabara
OBJECTIVE: To optimize the electrodiagnosis of Guillain-Barré syndrome (GBS) subtypes at first study. METHODS: The reference electrodiagnosis was obtained in 53 demyelinating and 45 axonal GBS patients on the basis of two serial studies and results of anti-ganglioside antibodies assay. We retrospectively employed sparse linear discriminant analysis (LDA), two existing electrodiagnostic criteria sets (Hadden et al., 1998; Rajabally et al., 2015) and one we propose that additionally evaluates duration of motor responses, sural sparing pattern and defines reversible conduction failure (RCF) in motor and sensory nerves at second study...
April 20, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28514704/guillain-barr%C3%A3-syndrome-variants-forms-fruste-reclassification-with-new-criteria
#2
Fu Liong Hiew, Rahmansah Ramlan, Shanthi Viswanathan, Santhi Puvanarajah
OBJECTIVES: This study aimed to evaluate the clinical and electrophysiological characteristics of various distinctive classical and localised Guillain-Barré syndrome (GBS) subtypes. PATIENTS AND METHODS: Clinical characteristics and electrophysiological data of sixty-one consecutive patients admitted between 2012 and 2015 were systematically analysed and reclassified according to the new GBS clinical classification. Neurophysiology was evaluated with Hadden et al...
May 4, 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28511974/risk-factor-analysis-for-meralgia-paresthetica-a-hospital-based-study-in-taiwan
#3
Wei-Chieh Weng, Yi-Chia Wei, Wen-Yi Huang, Yu-Yi Chien, Tsung-I Peng, Chia-Lun Wu
Recognizing the cause is essential for the management of meralgia paresthetica (MP), also known as lateral femoral cutaneous neuropathy. The aim of this study was to investigate the etiologies of MP and their influence on each other. This retrospective study enrolled referral patients with electromyographic studies who fulfilled the clinical and electrodiagnostic criteria of MP from January 2003 to December 2013. Data including age, gender, body weight, body height, occupation, and relevant medical history were collected...
May 13, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28496986/a-case-of-stiff-dog-syndrome-associated-with-anti-glutamic-acid-decarboxylase-antibodies
#4
Theresa E Pancotto, John H Rossmeisl
BACKGROUND: The stiff person syndrome (SPS) is a rare and debilitating autoimmune disorder with an unknown pathogenesis and variable clinical presentation that can present a diagnostic challenge. Although entities that clinically mimic stiff-person spectrum disorders (SPSD) have manifested in horses, they have not been reported in dogs. CASE PRESENTATION: We describe a 2-year-old beagle dog presented for progressive attacks of muscular rigidity and lordosis with superimposed spasms of the appendicular muscles triggered by tactile stimulation which resulted in marked gait impairment...
2017: Journal of Clinical Movement Disorders
https://www.readbyqxmd.com/read/28488619/peripheral-nerve-injuries-a-retrospective-survey-of-1124-cases
#5
João A Kouyoumdjian, Carla R Graça, Vanessa F M Ferreira
BACKGROUND: Peripheral nerve injuries (PNIs) remain an important health problem often leading to severe motor disabilities predominantly in the younger population. OBJECTIVE: To analyze our experience of clinical and electrodiagnostic evaluation (EDX) of PNIs over a 26-year period. MATERIALS AND METHODS: Between 1989 and 2014, 1124 consecutive patients with 1418 PNIs were referred for clinical as well as EDX evaluation. These PNIs involved upper and lower limbs as well as the facial nerves...
May 2017: Neurology India
https://www.readbyqxmd.com/read/28485505/posterior-interosseous-nerve-syndrome-after-pneumatic-hammer-use-an-uncommon-condition
#6
Bernardo Nunes, Francisco Serdoura, Luísa Vital, Manuel Seara, Rui Pinto
This case report presents a 27 year-old manual worker with right wrist extension deficit after pneumatic hammer handling. MRI and electromyographic studies revealed partial compromise of the posterior interosseous nerve (PIN) proximal to the branch for the extensor digitorum communis. The patient enrolled a 6-week rehabilitation period and recovered without remaing symptoms. PIN syndrome has mostly been associated with compressive neuropathies of the upper limb, but has seldom been reported in labor contexts...
May 9, 2017: American Journal of Industrial Medicine
https://www.readbyqxmd.com/read/28483540/peripheral-nervous-system-involvement-in-systemic-lupus-erythematosus-prevalence-clinical-and-immunological-characteristics-treatment-and-outcome-of-a-large-cohort-from-a-single-centre
#7
REVIEW
Pilar Toledano, Ramón Orueta, Ignasi Rodríguez-Pintó, Josep Valls-Solé, Ricard Cervera, Gerard Espinosa
Disorders of peripheral nervous system in patients with systemic lupus erythematosus (PNS-SLE) are a major cause of morbidity. The aims of the present study were to determine the prevalence of PNS-SLE involvement in a large cohort of SLE patients from a single centre, to characterize such involvement, treatment modalities and outcome, and to identify the possible variables that may be associated with its presence. We performed an observational cross-sectional study that included all SLE patients being followed in our department between March and December 2015 who met at least one of the PNS-SLE case definitions proposed in 1999 by the American College of Rheumatology...
May 5, 2017: Autoimmunity Reviews
https://www.readbyqxmd.com/read/28482727/diagnosis-of-secondary-peripheral-neurolymphomatosis-a-multi-center-experience
#8
Ja Min Byun, Ki Hwan Kim, Miso Kim, Tae Min Kim, Yoon Kyung Jeon, Jeong Hwan Park, Jin Ho Paik, Jung Min Lee, Ho-Young Lee, Jong Seok Lee, Dae Seog Heo, Jeong-Ok Lee
Here, we describe our experience with secondary neurolymphomatosis (NL) in non-Hodgkin lymphoma patients, with the emphasis on the diagnosis process. A retrospective chart review of 12 patients from 3 tertiary academic centers between January 2005 and December 2015 was conducted. Secondary NL was diagnosed within a median interval of 10 months (range 5-41 months) after initial diagnosis of NHL. Painful neuropathy was present in 66.7%, but the diagnosis of NL was delayed in nine out of 12 patients (75.0%) by median of 2 months...
May 9, 2017: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/28480963/use-of-stimulated-emg-in-the-analysis-of-the-neuromuscular-junction-in-children
#9
REVIEW
Matthew C Pitt
A screening test is needed to diagnose disorders of the neuromuscular junction (NMJ) in children. This article describes the development of Stimulation Potential Analysis with Concentric needle Electrodes under the acronym SPACE. This nomenclature was chosen to distinguish the technique from single fibre methodology because of the difficulties in identifying single fibre potentials in most studies, particularly those with the most severe abnormalities of the NMJ. Performed on orbicularis oculi in children with proven or probable disorders of the NMJ, it demonstrated a sensitivity of 84%, specificity of 71%, negative predictive value of 95% and positive predictive value of 36%...
May 8, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28461025/amyotrophic-lateral-sclerosis-or-not-keys-for-the-diagnosis
#10
REVIEW
T Lenglet, J-P Camdessanché
Amyotrophic lateral sclerosis (ALS) is a degenerative motor neuron disease (MND) which prognosis is poor. Early diagnosis permit to set up immediately adapted treatment and cares. Available diagnostic criteria are based on the detection of both central and peripheral motor neuron injury in bulbar, cervical, thoracic and lumbar regions. Electrodiagnostic (EDX) tests are the key tools to identify peripheral motor neuron involvement. Needle examination records abnormal activities at rest, and looks for neurogenic pattern during muscle contraction...
April 28, 2017: Revue Neurologique
https://www.readbyqxmd.com/read/28456889/childhood-hereditary-ataxias-experience-from-a-tertiary-referral-university-hospital-in-turkey
#11
Elif Acar Arslan, Rahşan Göçmen, Kader Karlı Oğuz, Gökçen Düzgün Konuşkan, Esra Serdaroğlu, Haluk Topaloğlu, Meral Topçu
Hereditary ataxias are a group of genetic disorders that are progressive and heterogeneous. The purpose of this study was to develop a practical and time-efficient approach to diagnosing childhood hereditary ataxias by analyzing characteristics and final diagnosis at a tertiary referral clinic for pediatric neurology. 196 patients admitted to the pediatric neurology department were included. The medical records were examined for demographic features, neurological, laboratory, electrophysiological, cranial imaging, and pathological findings, and for genetic studies...
April 29, 2017: Acta Neurologica Belgica
https://www.readbyqxmd.com/read/28443704/independent-variables-affecting-outcome-of-carpal-tunnel-release-surgery
#12
Jacqueline D Watchmaker, Greg P Watchmaker
BACKGROUND: In making the decision to undergo carpal tunnel release (CTR), patients may consider probability of symptom resolution. Prior studies have examined potential preoperative variables that might influence the postoperative outcome. Few studies, however, contain the sample size, prospective design, and high participant completion rate to provide solid data from which to counsel patients. The purpose of this study was to prospectively evaluate factors that have been implicated or dismissed in past studies as sources of outcome variation following CTR surgery and provide patient-relatable facts that the surgeon might use in preoperative patient counseling...
April 1, 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28440863/fewdon-mnd-syndrome-finger-extension-weakness-and-downbeat-nystagmus-a-novel-motor-neuron-disorder
#13
Aline Delva, Nimish Thakore, Erik Pioro, Koen Poesen, Rachel Saunders-Pullman, Inge A Meijer, Janet C Rucker, John T Kissel, Philip Van Damme
Introduction Disturbances of eye movements are infrequently encountered in motor neuron diseases or motor neuropathies, and there is no known syndrome that combines progressive muscle weakness with downbeat nystagmus. Methods To describe the core clinical features of a syndrome of motor neuron disease associated with downbeat nystagmus, clinical features were collected from 6 patients. Results All patients had slowly progressive muscle weakness and wasting, in combination with downbeat nystagmus, which was clinically most obvious in downward and lateral gaze...
April 25, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28439919/motor-polyradiculopathy-during-pembrolizumab-treatment-of-metastatic-melanoma
#14
Maria Sepúlveda, Eugenia Martinez-Hernandez, Lydia Gaba, Ivan Victoria, Nuria Sola-Valls, Neus Falgàs, Jordi Casanova-Molla, Francesc Graus
INTRODUCTION: Pembrolizumab, a monoclonal antibody directed against the immune checkpoint PD-1 (programmed cell death-1 receptor), has improved survival in patients with advanced melanoma. Neuromuscular immune-mediated side effects have been rarely reported. METHODS: We describe a 44-year-old man with metastatic melanoma who presented with progressive muscle weakness after 23 doses of pembrolizumab. RESULTS: The patient developed asymmetric, proximal muscle weakness and atrophy in all four limbs...
April 25, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28433831/ultrasonography-of-the-transverse-movement-and-deformation-of-the-median-nerve-and-its-relationships-with-electrophysiological-severity-in-the-early-stages-of-carpal-tunnel-syndrome
#15
Donghwi Park
BACKGROUND: To date, there have been conflicting suggestions regarding the initial pathogenesis of carpal tunnel syndrome (CTS). It has been characterized as either inflammation of the median nerve caused by compression or noninflammatory fibrosis of the subsynovial connective tissue (SSCT). OBJECTIVE: To investigate the initial pathogenesis of CTS, we compared the deformation and displacement of the median nerve in accordance with the electrophysiological severity between patients with CTS (via the Bland scale) and healthy controls...
April 19, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/28423347/experimental-study-of-brachial-plexus-and-vessel-compression-evaluation-of-combined-central-and-peripheral-electrodiagnostic-approach
#16
Chaoqun Yang, Jianguang Xu, Jie Chen, Shulin Li, Yu Cao, Yi Zhu, Lei Xu
INTRODUCTION: We sought to investigate the reliability of a new electrodiagnostic method for identifying Electrodiagnosis of Brachial Plexus & Vessel Compression Syndrome (BPVCS) in rats that involves the application of transcranial electrical stimulation motor evoked potentials (TES-MEPs) combined with peripheral nerve stimulation compound muscle action potentials (PNS-CMAPs). RESULTS: The latencies of the TES-MEP and PNS-CMAP were initially elongated in the 8-week group...
April 4, 2017: Oncotarget
https://www.readbyqxmd.com/read/28407266/hereditary-neuropathy-with-liability-to-pressure-palsy-in-patients-under-thirty-neurophysiological-data-and-proposed-electrodiagnostic-criteria
#17
Florence Robert-Varvat, Guillemette Jousserand, Françoise Bouhour, Christophe Vial, Pascal Cintas, Andoni Echaniz-Laguna, Emilien Delmont, Pierre Clavelou, Guy Chauplannaz, Laurent Jomir, Yann Péreon, Sarah Léonard-Louis, Véronique Manel, Jean-Christophe Antoine, Arnaud Lacour, Jean-Philippe Camdessanché
INTRODUCTION: In young patients with mononeuropathy who lack family history and precipitating factors, hereditary neuropathy with liability to pressure palsy (HNPP) may be a possibility. Our objective is to propose neurophysiological criteria for HNPP in patients aged <30 years. METHODS: We conducted a national multicenter retrospective clinical and neurophysiological study in patients under 30 with genetically confirmed HNPP. RESULTS: All of the 51 included patients had at least 1 demyelinating pattern in 2 asymptomatic nerves, and 3 abnormalities were found in almost 90%, including slowed motor nerve conduction velocity across the elbow in at least 1 ulnar nerve (97...
April 13, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28400223/acute-radial-neuropathy-at-the-spiral-groove-following-massage-a-case-presentation
#18
Po-Cheng Hsu, Jan-Wei Chiu, Chen-Liang Chou, Jia-Chi Wang
Massage-related nerve injury is an uncommon, rarely reported complication. We report an unusual case of radial nerve neuropathy at the spiral groove in a 58-year-old woman that resulted from a single episode of deep tissue massage. Although the spiral groove is known as the most common site implicated in radial nerve neuropathy, to our knowledge, there have not previously been any reports of massage-related spiral groove radial nerve neuropathy. Electrodiagnostic and ultrasound examinations were used to localize the nerve lesion at the spiral groove and also to provide prognostic evaluation...
April 9, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/28393557/recurrent-stingers-in-an-adolescent-football-player-dilemmas-of-return-to-play-a-case-report-and-review-of-the-literature
#19
Jason L Zaremski, MaryBeth Horodyski, Daniel C Herman
We present the case of a 16-year-old football linebacker with a history of recurrent stingers. Initial physical examination was normal as were cervical spine radiographs. MRI of the cervical spine revealed relative stenosis. Electrodiagnostic testing revealed chronic bilateral neurogenic changes of the superior trunk of the brachial plexus. A Kerr Collar was obtained to minimize head acceleration and force transmission through the neck. While there are return-to-play guidelines for recurrent stingers, there are inconsistencies with those recommendations...
April 10, 2017: Research in Sports Medicine
https://www.readbyqxmd.com/read/28387162/outcomes-following-carpal-tunnel-release-in-patients-receiving-workers-compensation-a-systematic-review
#20
John C Dunn, Nicholas A Kusnezov, Logan R Koehler, Dennis Vanden Berge, Ben Genco, Justin Mitchell, Justin D Orr, Mark Pallis
BACKGROUND: Carpal tunnel syndrome (CTS) is a common occupational pathology, representing a high percentage of workers' compensation (WC) claims. METHODS: The literature was reviewed for all studies evaluating CTS outcomes including WC patients between 1993 and 2016. A total of 348 articles were identified; 25 of which met inclusion and exclusion criteria. A systematic review was generated; patient demographics, outcomes, and complications were recorded. Weighted averages were calculated for the demographic and outcome data...
April 1, 2017: Hand: Official Journal of the American Association for Hand Surgery
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