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https://www.readbyqxmd.com/read/28821978/assessment-of-paraspinal-neurogenic-tumors-with-diffusion-weighted-mr-imaging
#1
Ahmed Abdel Khalek Abdel Razek, Germeen Albair Ashmalla
PURPOSE: To assess paraspinal neurogenic tumors with diffusion-weighted MR imaging. METHODS: Retrospective analysis was done upon 34 patients with paraspinal neurogenic tumors that underwent diffusion-weighted MR imaging. The ADC values of the mediastinal neurogenic tumors were calculated and correlated with biopsy results. RESULTS: The ADC of benign paraspinal neurogenic tumors (1.5 ± 0.28 × 10(-3) mm(2)/s) was significantly higher (P = 0...
August 18, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28821680/cortical-representations-of-speech-in-a-multi-talker-auditory-scene
#2
Krishna C Puvvada, Jonathan Z Simon
The ability to parse a complex auditory scene into perceptual objects is facilitated by a hierarchical auditory system. Successive stages in the hierarchy transform an auditory scene of multiple overlapping sources, from peripheral tonotopically-based representations in the auditory nerve, into perceptually distinct auditory-objects based representation in auditory cortex. Here, using magneto-encephalo-graphy (MEG) recordings from human subjects, both men and women, we investigate how a complex acoustic scene consisting of multiple speech sources is represented in distinct hierarchical stages of auditory cortex...
August 18, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28821642/super-optimal-perceptual-integration-suggests-a-place-based-representation-of-pitch-at-high-frequencies
#3
Bonnie K Lau, Anahita H Mehta, Andrew J Oxenham
Pitch, the perceptual correlate of sound repetition rate or frequency, plays an important role in speech perception, music perception, and listening in complex acoustic environments. Despite its perceptual importance, the neural mechanisms underlying pitch remain poorly understood. Although cortical regions responsive to pitch have been identified, little is known about how pitch information is extracted from the inner ear itself. The two primary theories of peripheral pitch coding involve stimulus-driven spike timing, or phase locking, in the auditory nerve (time code), and the spatial distribution of responses along the length of the cochlear partition (place code)...
August 17, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28820842/-upper-extremity-innervation-patterns-and-clinical-implications-for-nerve-and-tendon-transfer
#4
Ellen Y Lee, Sandeep J Sebastin, Andre Cheah, V P Kumar, Aymeric Y T Lim
BACKGROUND: We previously studied the intramuscular innervation of 150 upper limb muscles and demonstrated that certain patterns of intramuscular innervation allowed muscles to be split into compartments with independent function. This study aims to determine the location, extra-muscular course, and number of motor nerve branches of upper limb peripheral nerves. We want to combine this information with our previous work to create a blueprint of upper limb neuromuscular anatomy that would be useful in reconstructive surgery...
August 8, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28820803/perioperative-breast-analgesia-a-qualitative-review-of-anatomy-and-regional-techniques
#5
Glenn E Woodworth, Ryan M J Ivie, Sylvia M Nelson, Cameron M Walker, Robert B Maniker
Breast surgery is exceedingly common and may result in significant acute as well as chronic pain. Numerous options exist for the control of perioperative breast pain, including several newly described regional anesthesia techniques, but anesthesiologists have an insufficient understanding of the anatomy of the breast, the anatomic structures disrupted by the various breast surgeries, and the theoretical and experimental evidence supporting the use of the various analgesic options. In this article, we review the anatomy of the breast, common breast surgeries and their potential anatomic sources of pain, and analgesic techniques for managing perioperative pain...
September 2017: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/28820624/retinopathy-and-optic-atrophy-expanding-the-phenotypic-spectrum-of-pathogenic-variants-in-the-aars2-gene
#6
Jason H Peragallo, Stephanie Keller, Marjo S van der Knaap, Bruno P Soares, Suma P Shankar
BACKGROUND: Optic atrophy may be the sequela of optic nerve injury due to any insult, including isolated and syndromic genetic diseases. Alanyl-tRNA synthetase 2 (AARS2) pathogenic variants have been reported to cause leukodystrophy with ovarian failure, and cardiomyopathy (#615889) as well as combined oxidative phosphorylation deficiency-8 (#614096). We report a young child who presented with decreased vision due to optic atrophy and was found to harbor missense variants in the AARS2 gene expanding the phenotypic expression of the AARS2 gene...
August 18, 2017: Ophthalmic Genetics
https://www.readbyqxmd.com/read/28819736/pain-and-compression-neuropathy-in-primary-inguinal-hernia
#7
R Wright, D E Born, N D'Souza, L Hurd, R Gill, D Wright
PURPOSE: Enlargement of the ilioinguinal nerve at the external inguinal ring is observed in 34% of patients undergoing primary open inguinal herniorrhaphy; in 88% of patients it occurs at the fascial edge where the hernia mushrooms with abdominal pressure. Compression neuropathy occurs near many anatomical nerve constriction sites and is associated with enlargement of the peripheral nerve accompanied by sensory changes. METHODS: In this prospective study, Carolina Comfort Scale (CCS) questionnaire data was collected for 35 primary hernia repairs...
August 17, 2017: Hernia: the Journal of Hernias and Abdominal Wall Surgery
https://www.readbyqxmd.com/read/28819062/nodes-paranodes-and-neuropathies
#8
REVIEW
Janev Fehmi, Steven S Scherer, Hugh J Willison, Simon Rinaldi
This review summarises recent evidence supporting the involvement of the specialised nodal and perinodal domains (the paranode and juxtaparanode) of myelinated axons in the pathology of acquired, inflammatory, peripheral neuropathies.The identification of new target antigens in the inflammatory neuropathies heralds a revolution in diagnosis, and has already begun to inform increasingly targeted and individualised therapies. Rapid progress in our basic understanding of the highly specialised nodal regions of peripheral nerves serves to strengthen the links between their unique microstructural identities, functions and pathologies...
August 17, 2017: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/28818700/vascularized-jejunal-mesenteric-lymph-node-transfer-a-novel-surgical-treatment-for-extremity-lymphedema
#9
Michelle Coriddi, Corrine Wee, Joseph Meyerson, Daniel Eiferman, Roman Skoracki
BACKGROUND: Vascularized lymph node transfer (VLNT) is a surgical treatment for lymphedema. Multiple donor sites have been described and each has significant disadvantages. We propose the jejunal mesentery as a novel donor site for VLNT. METHODS: Cadaveric anatomic study analyzing jejunal lymph nodes (LNs) and description of outcomes from the first patients who received jejunal mesenteric VLNT for treatment of lymphedema. RESULTS: In 5 cadavers, the average number of total LNs and peripheral LNs were identified in the proximal, middle and distal segments of jejunum...
August 14, 2017: Journal of the American College of Surgeons
https://www.readbyqxmd.com/read/28818455/adipose-derived-stromal-cells-enhance-auditory-neuron-survival-in-an-animal-model-of-sensory-hearing-loss
#10
Philipp Schendzielorz, Maike Vollmer, Kristen Rak, Armin Wiegner, Nashwa Nada, Katrin Radeloff, Rudolf Hagen, Andreas Radeloff
BACKGROUND: A cochlear implant (CI) is an electronic prosthesis that can partially restore speech perception capabilities. Optimum information transfer from the cochlea to the central auditory system requires a proper functioning auditory nerve (AN) that is electrically stimulated by the device. In deafness, the lack of neurotrophic support, normally provided by the sensory cells of the inner ear, however, leads to gradual degeneration of auditory neurons with undesirable consequences for CI performance...
August 14, 2017: Cytotherapy
https://www.readbyqxmd.com/read/28818412/are-extramedian-symptoms-associated-with-peripheral-causes-in-patient-with-carpal-tunnel-syndrome-electrodiagnostic-and-ultrasonographic-study
#11
Basak Mansiz-Kaplan, Merve Akdeniz-Leblecicier, Ilker Yagci
OBJECTIVE: To evaluate the relationship between extramedian spreading of sensorial symptoms and median and ulnar nerve cross-sectional area (CSA) and to compare the ultrasonographic and electrophysiological findings in patients with carpal tunnel syndrome (CTS) with or without extramedian sensory symptoms. DESIGN: Cross-sectional study. MATERIALS AND METHODS: Patients with CTS were divided into two groups as with or without extramedian symptoms and were assessed clinically, electrophysiologically and ultrasonographically by three blind investigators...
August 10, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/28815909/proximal-neuropathy-and-associated-skeletal-muscle-changes-resembling-denervation-atrophy-in-hind-limbs-of-chronic-hypoglycaemic-rats
#12
Vivi F H Jensen, Anne-Marie Molck, Henrik Soeborg, Jette Nowak, Melissa Chapman, Jens Lykkesfeldt, Ingrid B Bogh
Peripheral neuropathy is one of the most common complications of diabetic hyperglycaemia. Insulin-induced hypoglycaemia (IIH) might potentially exacerbate or contribute to neuropathy as hypoglycaemia also causes peripheral neuropathy. In rats, IIH induces neuropathy associated with skeletal muscle changes. Aims of the present study were to investigate the progression and sequence of histopathologic changes caused by chronic IIH in rat peripheral nerves and skeletal muscle, and whether such changes were reversible...
August 16, 2017: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28815646/a-novel-endpoint-for-the-assessment-of-chemotherapy-induced-peripheral-neuropathy-in-rodents-biomechanical-properties-of-peripheral-nerve
#13
Chang-Ning Liu, Edwin Berryman, David Zakur, Ahmed M Shoieb, Ingrid D Pardo, Magalie Boucher, Chris J Somps, Chedo M Bagi, Jon C Cook
Chemotherapy-induced peripheral neuropathy (CiPN) is a frequent adverse effect in patients and a leading safety consideration in oncology drug development. Although behavioral assessment and microscopic examination of the nerves and dorsal root ganglia can be incorporated into toxicity studies to assess CiPN risk, more sensitive and less labor-intensive endpoints are often lacking. In this study, rats and mice administered vincristine (75 μg kg(-1)  day(-1) , i.p., for 10 days in rats and 100 μg kg(-1)  day(-1) , i...
August 16, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28814430/the-2017-eular-standardised-procedures-for-ultrasound-imaging-in-rheumatology
#14
Ingrid Möller, Iustina Janta, Marina Backhaus, Sarah Ohrndorf, David A Bong, Carlo Martinoli, Emilio Filippucci, Luca Maria Sconfienza, Lene Terslev, Nemanja Damjanov, Hilde Berner Hammer, Iwona Sudol-Szopinska, Walter Grassi, Peter Balint, George A W Bruyn, Maria Antonietta D'Agostino, Diana Hollander, Heidi J Siddle, Gabriela Supp, Wolfgang A Schmidt, Annamaria Iagnocco, Juhani Koski, David Kane, Daniela Fodor, Alessandra Bruns, Peter Mandl, Gurjit S Kaeley, Mihaela Micu, Carmen Ho, Violeta Vlad, Mario Chávez-López, Georgios Filippou, Carmen Elena Cerón, Rodina Nestorova, Maritza Quintero, Richard Wakefield, Loreto Carmona, Esperanza Naredo
BACKGROUND: In 2001, the European League Against Rheumatism developed and disseminated the first guidelines for musculoskeletal (MS) ultrasound (US) in rheumatology. Fifteen years later, the dramatic expansion of new data on MSUS in the literature coupled with technological developments in US imaging has necessitated an update of these guidelines. OBJECTIVES: To update the existing MSUS guidelines in rheumatology as well as to extend their scope to other anatomic structures relevant for rheumatology...
August 16, 2017: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/28814147/-express-threshold-effect-of-g9a-glp-on-peripheral-nerve-injury-induced-hypersensitivity
#15
Xian Wang, Xiaofeng Shen, Shaolei Ma, Yusheng Liu, Shiqin Xu, Shizheng Wu, Fuzhou Wang
No abstract text is available yet for this article.
January 2017: Molecular Pain
https://www.readbyqxmd.com/read/28814013/a-third-arm-design-of-a-bypass-prosthesis-enabling-incorporation
#16
Adam W Wilson, Daniel H Blustein, Jon W Sensinger
A variety of factors affect the performance of a person using a myoelectric prosthesis, including increased control noise, reduced sensory feedback, and muscle fatigue. Many studies use able-bodied subjects to control a myoelectric prosthesis using a bypass socket in order to make comparisons to movements made with intact limbs. Depending on the goals of the study, this approach can also allow for greater subject numbers and more statistical power in the analysis of the results. As we develop assessment tools and techniques to evaluate how peripheral nerve interfaces impact prosthesis incorporation, involving normally limbed subjects in the studies becomes challenging...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813963/novel-neural-interface-electrode-array-for-the-peripheral-nerve
#17
Ockchul Kim, Wonsuk Choi, Woohyun Jung, Sunyoung Jung, HyungDal Park, Jong Woong Park, Jinseok Kim
Peripheral neural interface (PNI) is becoming an essential technology in the field of robotic prosthesis due to its potential for providing bidirectional neural signal communication between the prosthetic arm and the brain. However, current PNIs inefficiently trade off neural signal selectivity and the invasiveness of the device. We designed and fabricated a new PNI electrode array that has high signal selectivity yet maintains low invasiveness by incorporating a design that allows for three-dimensional spiral insertion around the peripheral nerve...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813926/development-of-an-intrafascicular-neural-interface-for-peripheral-nerve-implantation
#18
Namsun Chou, YooNa Kang, Ho-Seong Kang, Jeong-Dae Yun, Wonju Chun, Kyeong Jae Lee, HyunMin Moon, Ik-Kyu Choi, Donghak Byun, Inho Song, Dong-Jun Moon, Jin-Hee Moon, Byeong Han Lee, Jungsuk Kim, Sung-Keun You, Sohee Kim
This paper describes an intrafascicular neural interface for peripheral nerve implantation. The flexible penetrating microelectrode array with varying lengths (vl-FPMA), interconnection cable, wireless recording and stimulator modules were designed and fabricated to detect neural signals from the peripheral nerves or to stimulate them. The vl-FPMA consisted of silicon needles and polydimethylsiloxane (PDMS) platform supporting the needles. The length of electrode needles varied from 600 to 1000 μm. The interconnection cable was fabricated as parylene-metal-parylene sandwiched structure...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813519/expression-and-inhibition-of-brd4-ezh2-and-top2a-in-neurofibromas-and-malignant-peripheral-nerve-sheath-tumors
#19
Azadeh Amirnasr, Rob M Verdijk, Patricia F van Kuijk, Walter Taal, Stefan Sleijfer, Erik A C Wiemer
Malignant peripheral nerve sheath tumors (MPNST) are rare, highly aggressive sarcomas that can occur spontaneously or from pre-existing plexiform neurofibromas in neurofibromatosis type1 (NF1) patients. MPNSTs have high local recurrence rates, metastasize easily, are generally resistant to therapeutic intervention and frequently fatal for the patient. Novel targeted therapeutic strategies are urgently needed. Standard treatment for patients presenting with advanced disease is doxorubicin based chemotherapy which inhibits the actions of the enzyme topoisomerase IIα (TOP2A)...
2017: PloS One
https://www.readbyqxmd.com/read/28813199/hypoglossal-canal-lesions-distinctive-imaging-features-and-simple-diagnostic-algorithm
#20
Steven M Weindling, Christopher P Wood, Joseph M Hoxworth
OBJECTIVE: The objective of this study is to compare the prevalence of hypoglossal canal lesions and identify differentiating imaging features. MATERIALS AND METHODS: A 15-year retrospective review of lesions of the hypoglossal nerve and hypoglossal canal, excluding those in patients with metastasis or prior head and neck cancer and those treated with radiation or surgery, was performed. Clinical findings and lesion imaging features were documented. The contrast-enhanced T1-weighted non-enhancing cystic component of hypoglossal schwannomas was compared with size-matched pathologically proven vestibular schwannomas...
August 16, 2017: AJR. American Journal of Roentgenology
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