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Peripheral nerve entrapment

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https://www.readbyqxmd.com/read/29136549/the-spectrum-of-charcot-marie-tooth-disease-due-to-myelin-protein-zero-an-electrodiagnostic-nerve-ultrasound-and-histological-study
#1
Gian Maria Fabrizi, Stefano Tamburin, Tiziana Cavallaro, Ilaria Cabrini, Moreno Ferrarini, Federica Taioli, Francesca Magrinelli, Giampietro Zanette
OBJECTIVE: Nerve ultrasound (US) data on myelin protein zero (MPZ)-related Charcot-Marie-Tooth disease (CMT) are lacking. To offer a comprehensive perspective on MPZ-related CMTs, we combined nerve US with clinics, electrodiagnosis and histopathology. METHODS: We recruited 36 patients (12 MPZ mutations), and correlated nerve US to clinical, electrodiagnostic measures, and sural nerve biopsy. RESULTS: According to motor nerve conduction velocity (MNCV) criteria, nine patients were categorized as "demyelinating" CMT1B, 17 as "axonal" CMT2I/J, and 10 as dominant "intermediate" CMTDID...
October 20, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29100792/assessing-the-reliability-of-ultrasound-imaging-to-examine-peripheral-nerve-excursion-a-systematic-literature-review
#2
REVIEW
Ben Kasehagen, Richard Ellis, Rodney Pope, Nicholas Russell, Wayne Hing
Ultrasound imaging (USI) is gaining popularity as a tool for assessing nerve excursion and is becoming an important tool for the assessment and management of entrapment neuropathies. This systematic review aimed to identify current methods and report on the reliability of using USI to examine nerve excursion and identify the level of evidence supporting the reliability of this technique. A systematic search of five electronic databases identified studies assessing the reliability of using USI to examine nerve excursion...
October 31, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29083521/peripheral-nerve-diffusion-tensor-imaging-overview-pitfalls-and-future-directions
#3
Tina Jeon, Maggie M Fung, Kevin M Koch, Ek T Tan, Darryl B Sneag
Diffusion tensor imaging (DTI) is a noninvasive magnetic resonance imaging (MRI) technique that measures the extent of restricted water diffusion and anisotropy in biological tissue. Although DTI has been widely applied in the brain, more recently researchers have used it to characterize nerve pathology in the setting of entrapment neuropathy, traumatic injury, and tumor. DTI artifacts are exacerbated when imaging off isocenter in the body. Anecdotally, the most significant artifacts in peripheral nerve DTI include magnetic field inhomogeneity, motion, incomplete fat suppression, aliasing, and distortion...
October 30, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29026761/postherpetic-neuralgia-diabetic-neuropathy-and-trigeminal-neuralgia-chronic-peripheral-neuropathic-pain-in-58-480-rural-italian-primary-care-patients
#4
Nicola Buono, Hans Thulesius, Ferdinando Petrazzuoli, Elena Castelli, Marco Cambielli
INTRODUCTION: Chronic peripheral neuropathic pain (CPNP) is a condition due to peripheral nervous system diseases or injury, but its prevalence is unknown in Italian primary care. AIM: The aim of this study is to assess the prevalence of CPNP in a rural primary care area in Northern Italy. MATERIALS AND METHODS: A multicenter audit study was carried out in a rural area in Northern Italy with 113 participating general practitioners (GPs) seeing 58,480 patients >18 years during 3 months...
January 2017: Journal of Family Medicine and Primary Care
https://www.readbyqxmd.com/read/29022773/native-paraneurial-tissue-and-paraneurial-adhesions-alter-nerve-strain-distribution-in-rat-sciatic-nerves
#5
Ian M Foran, Vincent Hussey, Rushil A Patel, Jaemyoung Sung, Sameer B Shah
Paraneurial adhesions have been implicated in the pathological progression of entrapment neuropathies. Surgical decompression of adhesions is often performed, with the intent of restoring nerve kinematics. The normal counterpart of adhesions, native paraneurium, is also thought to influence nerve deformation and mobility. However, influences of native or abnormal paraneurial structures on nerve kinematics have not been investigated. We measured regional strains in rat sciatic nerves before and immediately after decompression of native paraneurial tissue, and before and after decompression of abnormal paraneurial adhesions, which formed within 6 weeks of the initial decompression...
January 1, 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/29021927/split-femoral-nerve-due-to-psoas-tertius-muscle-a-review-with-other-cases-of-variant-muscles-traversing-the-femoral-nerve
#6
Shehzad Khalid, Joe Iwanaga, Marios Loukas, R Shane Tubbs
Leg pain from lumbar disc herniation is a common presentation. However, certain muscular and peripheral nerve variants may present similarly and represent an unrecognized etiology of femoral nerve dysfunction. Such cases might affect the outcome of specific treatment regimes. Therefore, recognition of these variations in anatomy may be useful to the clinician when treating the patient with medically refractory lower limb pain. Some reports have reported variant slips of the psoas and iliacus muscles, which may split the femoral nerve causing a potential risk for nerve entrapment...
August 9, 2017: Curēus
https://www.readbyqxmd.com/read/28978583/management-and-patients-perspective-regarding-a-common-peroneal-nerve-schwannoma-a-rare-cause-of-lower-leg-pain-in-a-young-individual
#7
Aniek Pm van Zantvoort, Paul Cuppen, Marc R Scheltinga
The differential diagnosis of exercise-induced lower leg pain in young individuals is extensive and includes entities such as chronic exertional compartment syndrome, popliteal arterial entrapment syndrome, cystic adventitial disease, medial tibial stress syndrome and tibial stress fractures. Peripheral nerve-related lower leg pain syndromes are unusual. We present a 41-year-old woman who was diagnosed with an ancient schwannoma of the right common peroneal nerve (CPN) as a rare cause of lower leg pain. This case report provides simple diagnostic bedside tools that may be used to diagnose CPN abnormalities...
October 4, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28968362/ultrasonography-in-peripheral-nervous-system-diagnosis
#8
Francis O Walker
PURPOSE OF REVIEW: High-resolution ultrasound has made it possible to view most nerves and muscles in real time and to identify pathologic change in size, echo texture, and vascularity. This article focuses on the principles underlying ultrasound imaging and the application of ultrasound imaging to clinical disorders commonly seen in an electrodiagnostic laboratory. RECENT FINDINGS: Ultrasound is a sensitive and specific tool for evaluating myopathic and neurogenic muscle disease...
October 2017: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/28932862/tailored-release-of-triiodothyronine-and-retinoic-acid-from-a-spatio-temporally-fabricated-nanofiber-composite-instigating-neuronal-differentiation
#9
Aishwarya Satish, Purna Sai Korrapati
Regeneration of the central and peripheral nervous system is challenging since the functional restoration of injured nerves is an incredible task. The fabrication of an ideal nerve guide that fulfills the requirement to regenerate nerve tissue is a herculean challenge requiring a combination of both biochemical and topographical cues. The present study explores the combinatorial effect of aligned nanofibers and the regulated delivery of triiodothyronine and retinoic acid on nerve regeneration. A sequential release mechanism is adopted in fabricating the nanofiber scaffold, with triiodothyronine incorporated into the nanofiber shell ensuring its prior release, followed by retinoic acid (entrapped within zein nanoparticles) from the core...
October 5, 2017: Nanoscale
https://www.readbyqxmd.com/read/28932698/quantitative-magnetic-resonance-mr-neurography-for-evaluation-of-peripheral-nerves-and-plexus-injuries
#10
REVIEW
Teodoro Martín Noguerol, Rafael Barousse, Mariano Socolovsky, Antonio Luna
Traumatic conditions of peripheral nerves and plexus have been classically evaluated by morphological imaging techniques and electrophysiological tests. New magnetic resonance imaging (MRI) studies based on 3D fat-suppressed techniques are providing high accuracy for peripheral nerve injury evaluation from a qualitative point of view. However, these techniques do not provide quantitative information. Diffusion weighted imaging (DWI) and diffusion tensor imaging (DTI) are functional MRI techniques that are able to evaluate and quantify the movement of water molecules within different biological structures...
August 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28928252/acute-carpal-tunnel-syndrome-caused-by-thrombosed-persistent-median-artery-associated-with-bifurcated-median-nerve-in-a-pregnant-woman
#11
Ayse Serap Akgun, Gulhan Ertan, Sila Ulus
Carpal tunnel syndrome (CTS) is a common form of peripheral nerve entrapment, which is observed due to compression of the median nerve at the level of the carpal tunnel in the wrist. Bifid median nerve and persistent median artery association are rare, and they may be independent risk factors for CTS. These rare entities are usually asymptomatic, but in cases of acute thrombosis or dilatation of the persistent median artery, acute findings can be seen. We report a case of acute CTS due to thrombosis of a persistent median artery and associated bifurcated median nerve during pregnancy...
September 19, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28845734/local-and-extensive-neuroplasticity-in-carpal-tunnel-syndrome-a-resting-state-fmri-study
#12
Ye-Chen Lu, Han Zhang, Mou-Xiong Zheng, Xu-Yun Hua, Yan-Qun Qiu, Yun-Dong Shen, Su Jiang, Jian-Guang Xu, Yu-Dong Gu, Wen-Dong Xu
Carpal tunnel syndrome (CTS) is a most common peripheral nerve entrapment neuropathy characterized by sensorimotor deficits in median nerve innervated digits. Block-design task-related functional magnetic resonance imaging (fMRI) studies have been used to investigate CTS-related neuroplasticity in the primary somatosensory cortices. However, considering the persistence of digital paresthesia syndrome caused by median nerve entrapment, spontaneous neuronal activity might provide a better understanding of CTS-related neuroplasticity, which remains unexplored...
August 1, 2017: Neurorehabilitation and Neural Repair
https://www.readbyqxmd.com/read/28811623/immune-dysregulation-in-patients-with-carpal-tunnel-syndrome
#13
Gila Moalem-Taylor, Benny Baharuddin, Barbara Bennett, Arun V Krishnan, William Huynh, Matthew C Kiernan, Cindy Shin-Yi Lin, Boaz Shulruf, Elizabeth Keoshkerian, Barbara Cameron, Andrew Lloyd
Peripheral immunity plays a key role in maintaining homeostasis and conferring crucial neuroprotective effects on the injured nervous system, while at the same time may contribute to increased vulnerability to neuropathic pain. Little is known about the reciprocal relationship between entrapment neuropathy and peripheral immunity. This study investigated immune profile in patients with carpal tunnel syndrome (CTS), the most prevalent entrapment neuropathy. All patients exhibited neurophysiological abnormalities in the median nerve, with the majority reporting neuropathic pain symptoms...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28803901/the-cubital-tunnel-syndrome-caused-by-the-intraneural-or-extraneural-ganglion-cysts-case-report-and-review-of-the-literature
#14
Wen Kai Chang, Yong Ping Li, Deng Feng Zhang, Bing Sheng Liang
Cubital tunnel syndrome is the second most common nerve compression syndrome in peripheral nerve compression disease. Although potential ulnar nerve entrapment can occur at multiple points along its course, such as the arcade of struthers, the medial intermuscular septum, the medial epicondyle, the cubital tunnel, and the deep flexor pronator aponeurosis, the most common site of entrapment is the cubital tunnel. However, cubital tunnel syndrome could also be caused by the occupying masses along the course of ulnar nerve, such as intraneural or extraneural ganglia...
October 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28705371/magnetic-resonance-neurography-of-the-pelvic-nerves
#15
Eric Weissman, Ethan Boothe, Vibhor Wadhwa, Kelly Scott, Avneesh Chhabra
Chronic pelvic pain syndrome is commonly caused by nerve injury, inflammation, or entrapment. Owing to the complex anatomy and branching patterns of pelvic nerves, pelvic neuropathies are often difficult to illustrate and diagnose. High-resolution 3-T magnetic resonance neurography is a promising technique for the evaluation of peripheral neuropathy. In this article, the authors discuss the normal anatomy of major pelvic nerves, technical considerations of high-resolution imaging, and normal and abnormal imaging appearances with relevant case examples...
June 2017: Seminars in Ultrasound, CT, and MR
https://www.readbyqxmd.com/read/28702813/dynamic-factors-involved-in-common-peroneal-nerve-entrapment-neuropathy
#16
Takao Kitamura, Kyongsong Kim, Daijiro Morimoto, Rinko Kokubo, Naotaka Iwamoto, Toyohiko Isu, Akio Morita
BACKGROUND: Common peroneal nerve (CPN) entrapment neuropathy (CPNEN) is the most common peripheral neuropathy of the lower extremities. The pathological mechanisms underlying CPNEN remain unclear. We sought to identify dynamic factors involved in CPNEN by directly measuring the CPN pressure during stepwise CPNEN surgery. METHODS: We enrolled seven patients whose CPNEN improved significantly after CPN neurolysis. All suffered intermittent claudication, and the repetitive plantar flexion test, used as a CPNEN provocation test, was positive...
July 12, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28611388/aberrant-plasticity-of-peripheral-sensory-axons-in-a-painful-neuropathy
#17
Takashi Hirai, Yatendra Mulpuri, Yanbing Cheng, Zheng Xia, Wei Li, Supanigar Ruangsri, Igor Spigelman, Ichiro Nishimura
Neuronal cells express considerable plasticity responding to environmental cues, in part, through subcellular mRNA regulation. Here we report on the extensive changes in distribution of mRNAs in the cell body and axon compartments of peripheral sensory neurons and the 3' untranslated region (3'UTR) landscapes after unilateral sciatic nerve entrapment (SNE) injury in rats. Neuronal cells dissociated from SNE-injured and contralateral L4 and L5 dorsal root ganglia were cultured in a compartmentalized system. Axonal and cell body RNA samples were separately subjected to high throughput RNA sequencing (RNA-Seq)...
June 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28594495/ulnar-tunnel-syndrome-radial-tunnel-syndrome-anterior-interosseous-nerve-syndrome-and-pronator-syndrome
#18
Adam B Strohl, David S Zelouf
In addition to the more common carpal tunnel and cubital tunnel syndromes, orthopaedic surgeons must recognize and manage other potential sites of peripheral nerve compression. The distal ulnar nerve may become compressed as it travels through the wrist, which is known as ulnar tunnel or Guyon canal syndrome. The posterior interosseous nerve may become entrapped in the proximal forearm as it travels through the radial tunnel, which results in a pain syndrome without motor weakness. The median nerve may become entrapped in the proximal forearm, which can result in a variety of symptoms...
February 15, 2017: Instructional Course Lectures
https://www.readbyqxmd.com/read/28522988/multiple-sites-ultrasonography-of-peripheral-nerves-in-differentiating-charcot-marie-tooth-type-1a-from-chronic-inflammatory-demyelinating-polyradiculoneuropathy
#19
Jingwen Niu, Liying Cui, Mingsheng Liu
INTRODUCTION: Multiple sites measurement of cross-sectional areas (CSA) by ultrasound was performed to differentiate Charcot-Marie-Tooth type 1A (CMT1A) and chronic inflammatory demyelinating polyradiculoneuropathy (CIDP). METHODS: Nine patients with CMT1A, 28 patients with CIDP, and 14 healthy controls (HC) were recruited prospectively. Consecutive ultrasonography scanning was performed from wrist to axilla on median and ulnar nerves. CSAs were measured at 10 predetermined sites of each nerve...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28502561/acute-hydrocephalus-due-to-a-primary-malignant-peripheral-nerve-sheath-tumor-of-the-cervicothoracic-junction-a-case-report-and-review-of-the-literature
#20
Y Samanci, H S Togay, R Yakar, F Kabukcuoglu, S E Celik
BACKGROUND: The estimated incidence of malignant nerve sheath tumors is 0.001% per year, and only 2-3% of those tumors involve the spinal nerves. We present a rare case of acute hydrocephalus caused by primary malignant peripheral nerve sheath tumor of the cervicothoracic junction. CASE DESCRIPTION: A 29-year-old previously healthy male patient, except for a history of two previous surgeries for ulnar nerve entrapment and progressive left upper extremity weakness, presented with acute onset somnolence...
May 11, 2017: Neuro-Chirurgie
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