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https://www.readbyqxmd.com/read/28227745/numerical-simulation-of-multipolar-configuration-and-prepulse-technique-to-obtain-spatially-reverse-recruitment-order
#1
Melissa Dali, Olivier Rossel, David Guiraud, Melissa Dali, Olivier Rossel, David Guiraud, Melissa Dali, Olivier Rossel, David Guiraud
In the context of functional electrical stimulation of peripheral nerves, the control of a specific motor or sensory functions may need selective stimulation to target the desired effect without others. In implanted stimulation, spatial selectivity is obtained using multipolar CUFF electrodes with specific spread of the current over each contact. Furthermore, electrical stimulation recruits large fibers before small ones, whereas the targeted function could be elicited by a specific fiber type i.e. fiber diameter...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227180/electrical-stimulation-of-the-saphenous-nerve-in-anesthetized-rats-a-novel-therapeutic-approach-to-treating-overactive-bladder
#2
Zainab Moazzam, Paul B Yoo, Zainab Moazzam, Paul B Yoo, Paul B Yoo, Zainab Moazzam
Posterior Tibial Nerve Stimulation (PTNS) is a minimally invasive yet effective therapy for treating overactive bladder (OAB) symptoms with electrical stimulations applied at 20 Hz coupled with amplitudes approximating the foot-twitch threshold (T). However, pre-clinical studies indicate that PTNS-evoked bladder reflexes require stimulation amplitudes exceeding 2T. The objective of this work was to evaluate the presence of secondary low-threshold sensory pathways in the hind-limb region that can be a potential target of activation during clinical PTNS set-up...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226860/an-implantable-designed-for-human-use-peripheral-nerve-stimulation-and-recording-system-for-advanced-prosthetics
#3
John R Lachapelle, Caroline K Bjune, Alexander L Kindle, Andrew Czarnecki, John R Burns, Julianne E Grainger, Carlos A Segura, Brian D Nugent, Tirunelveli S Sriram, Philip D Parks, Edward Keefer, Jonathan Cheng, John R Lachapelle, Caroline K Bjune, Alexander L Kindle, Andrew Czarnecki, John R Burns, Julianne E Grainger, Carlos A Segura, Brian D Nugent, Tirunelveli S Sriram, Philip D Parks, Edward Keefer, Jonathan Cheng, John R Lachapelle, Edward Keefer, Alexander L Kindle, Julianne E Grainger, John R Burns, Philip D Parks, Jonathan Cheng, Andrew Czarnecki, Brian D Nugent, Carlos A Segura, Tirunelveli S Sriram, Caroline K Bjune
Complex suture prostheses that deliver sensory and position feedback require a more sophisticated integration with the human user. Here a micro-size active implantable system that provides many-degree-of-freedom neural feedback in both sensory stimulation and motor control is shown, as one potential human-use solution in DARPA's HAPTIX program. Various electrical and mechanical challenge and solutions in meeting both sensory /motor performance as well as ISO 14708 FDA-acceptable human use in an aspirin-size active implementation are discussed...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226857/development-of-a-closed-loop-system-for-tremor-suppression-in-patients-with-parkinson-s-disease
#4
F L Xu, M Z Hao, S Q Xu, Z X Hu, Q Xiao, N Lan, F L Xu, M Z Hao, S Q Xu, Z X Hu, Q Xiao, N Lan, S Q Xu, Z X Hu, Q Xiao, M Z Hao, N Lan, F L Xu
More than 70% of patients suffering Parkinson's disease (PD) exhibit resting tremor in their extremities, hampering their ability to perform daily activities. Based on our earlier studies on corticospinal transmission of tremor signals [10,11], we hypothesize that cutaneous afferents evoked by surface stimulation can produce an inhibitory effect on propriospinal neurons (PN), which in turn will suppress tremor signals passing through the PN. This paper presents the development of a closed-loop system for tremor suppression by transcutaneous electrical nerve stimulation (TENS) of sensory fibers beneath the skin...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225050/impact-of-baseline-vitamin-b12-status-on-the-effect-of-vitamin-b12-supplementation-on-neurologic-function-in-older-people-secondary-analysis-of-data-from-the-open-randomised-controlled-trial
#5
L M Miles, E Allen, R Clarke, K Mills, R Uauy, A D Dangour
BACKGROUND/OBJECTIVES: The available evidence from randomised controlled trials suggests that vitamin B12 supplementation does not improve neurologic function in older people with marginal but not deficient Vitamin B12 status. This secondary analysis used data from the Older People and Enhanced Neurological function (OPEN) randomised controlled trial to assess whether baseline vitamin B12 status or change in vitamin B12 status over 12 months altered the effectiveness of dietary vitamin B12 supplementation on neurologic function in asymptomatic older people with depleted vitamin B12 status at study entry...
February 22, 2017: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28224625/the-effects-of-venous-ensheathment-on-facial-nerve-repair-in-the-rat
#6
Pei Chen, Christopher J Knox, Linli Yao, Chunli Li, Tessa A Hadlock
OBJECTIVE: To investigate the protective effect of autologous venous ensheathment on sutured rat facial nerve and to test whether the ensheathment could improve the functional recovery of repaired nerve and accuracy of axonal growth. STUDY DESIGN: In vivo study. METHODS: Forty-six rats were examined, with six rats serving as normal controls and 40 receiving facial nerve transection and suture repair (SR) or transection and suture repair with an additional venous ensheathment (VE)...
February 22, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28220906/experiences-with-preventing-carpal-tunnel-syndrome-in-an-automotive-plant
#7
Věra Žídková, Marie Nakládalová, Jana Zapletalová, Zdeněk Nakládal, Helena Kollárová
OBJECTIVES: Carpal tunnel syndrome (CTS) is a common occupational disease. The aim was to assess the effect of preventive measures in automotive assembly workers. MATERIAL AND METHODS: The analysis summarizes data from annual crosssectional studies. The 7-year analysis of data was based on medical records obtained from an occupational physician and inspections carried out at the workplace where targeted preventive measures were introduced, including better ergonomic arrangement of the workplace, technical adjustments facilitating the work, preventive nerve conduction studies (NCS) testing of the median nerve once a year, switching of workers and their targeted rotation within the workplace...
February 21, 2017: International Journal of Occupational Medicine and Environmental Health
https://www.readbyqxmd.com/read/28219984/motor-neurons-tune-premotor-activity-in-a-vertebrate-central-pattern-generator
#8
Kristy J Lawton, Wick M Perry, Ayako Yamaguchi, Erik Zornik
Central patterns generators (CPGs) are neural circuits that drive rhythmic motor output without sensory feedback. Vertebrate CPGs are generally believed to operate in a top-down manner in which premotor interneurons activate motor neurons that in turn drive muscles. In contrast, the frog (Xenopus laevis) vocal CPG contains a functionally unexplored neuronal projection from the motor nucleus to the premotor nucleus, indicating a recurrent pathway that may contribute to rhythm generation. In this study we characterized the function of this bottom-up connection...
February 20, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28219309/injury-of-the-infrapatellar-branch-of-the-saphenous-nerve-due-to-hamstring-graft-harvest
#9
Serkan Sipahioglu, Sinan Zehir, Baran Sarikaya, Ali Levent
PURPOSE: Sensory disturbance around the surgical incision due to injury of the infrapatellar branch of the saphenous nerve can be seen in the anterior cruciate ligament reconstruction. In this research, we aimed to compare the incidence, extent of sensory loss, its clinical effect, and natural course caused by two different skin incisions used for hamstring graft harvest. METHODS: Vertical incision for 36 patients and oblique incision for 42 patients used for graft harvest were included in this study...
January 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28217155/acute-bulbar-palsy-plus-syndrome-a-rare-variant-of-guillain-barre-syndrome
#10
Sanghamitra Ray, Prakash Chand Jain
Guillain-Barre syndrome (GBS) is the most common cause of acute flaccid paralysis worldwide both in adult and pediatric population. Although flaccid paralysis is the hallmark of this disease, there are some rare variants which may be easily missed unless suspected. Here, we present a very rare variant of GBS - acute bulbar palsy plus syndrome in a pediatric patient. A 13-year-old female child presented with right-sided lower motor neuron type of facial palsy and palsy of bilateral glossopharyngeal and vagus nerve of 2 weeks duration...
October 2016: Journal of Pediatric Neurosciences
https://www.readbyqxmd.com/read/28215300/the-role-of-neurotrophins-in-inflammation-and-allergy
#11
S Manti, P Brown, M K Perez, G Piedimonte
Allergic inflammation is the result of a specific pattern of cellular and humoral responses leading to the activation of the innate and adaptive immune system, which, in turn, results in physiological and structural changes affecting target tissues such as the airways and the skin. Eosinophil activation and the production of soluble mediators such as IgE antibodies are pivotal features in the pathophysiology of allergic diseases. In the past few years, however, convincing evidence has shown that neurons and other neurosensory structures are not only a target of the inflammatory process but also participate in the regulation of immune responses by actively releasing soluble mediators...
2017: Vitamins and Hormones
https://www.readbyqxmd.com/read/28215259/reduced-afferent-induced-facilitation-of-primary-motor-cortex-excitability-in-restless-legs-syndrome
#12
P Bocquillon, C Charley-Monaca, E Houdayer, A Marques, A Kwiatkowski, P Derambure, H Devanne
Restless legs syndrome (RLS) is characterized by the association of an urge to move, and vesperal or nocturnal sensory symptoms; it is frequently associated with periodic limb movements. Evidence from imaging and electrophysiological studies suggests that RLS is linked to changes in sensorimotor integration. Nevertheless, the underlying mechanisms have not been characterized, and the cortical origin has yet to be confirmed. The objective of the present study was to establish whether or not sensorimotor integration in RLS patients is impaired in the evening...
February 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28215248/quantitative-sensory-test-for-primary-restless-legs-syndrome-willis-ekbom-disease-using-the-current-perception%C3%A2-threshold-test
#13
Yong Won Cho, Min-Sung Kang, Keun Tae Kim, So Young Do, Jung-Geun Lim, So Young Lee, Gholam K Motamedi
BACKGROUND: Restless legs syndrome/Willis-Ekbom disease (RLS/WED) is a sensorimotor neurological disorder, and it is especially aggravated at night. The purpose of this study was to investigate the diurnal sensory dysfunction in primary RLS/WED using the current perception threshold (CPT) test, compared to healthy controls. METHODS: Thirty primary RLS/WED subjects and 30 healthy controls were enrolled. The severity of RLS/WED and sleep problems were evaluated in all subjects...
February 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28214652/unilateral-oculomotor-palsy-in-charcot-marie-tooth-disease-1a-cmt-1a
#14
A Posa, A Emmer, M E Kornhuber
BACKGROUND: Charcot-Marie-Tooth disease (CMT) type 1A is the most common form of CMT 1 and one of the autosomal dominant demyelinating hereditary motor and sensory neuropathies (HMSN). Cranial nerves may be frequently subclinically affected in CMT disease. However manifest clinical signs of cranial nerve involvement are rare. METHODS: This case comprise neurological, ophthalmological, internal medicine and ear-nose-throat investigation, motor and sensory nerve conduction velocity, auditory evoked potentials and orbicularis-oculi reflex measurements, lumbar puncture and blood examination, inclusive molecular genetic testing, as well as electrocardiogram and cranial imaging such as computer tomography and magnetic resonance imaging RESULTS: The present case shows a Charcot-Marie-Tooth (CMT) 1A patient with complete unilateral oculomotor palsy in combination with predominant ipsilateral subclinical trigeminal demyelination...
February 13, 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28212299/exogenous-and-endogenous-hydrogen-sulfide-protects-gastric-mucosa-against-the-formation-and-time-dependent-development-of-ischemia-reperfusion-induced-acute-lesions-progressing-into-deeper-ulcerations
#15
Marcin Magierowski, Katarzyna Magierowska, Magdalena Hubalewska-Mazgaj, Zbigniew Sliwowski, Robert Pajdo, Grzegorz Ginter, Slawomir Kwiecien, Tomasz Brzozowski
Hydrogen sulfide (H₂S) is an endogenous mediator, synthesized from l-cysteine by cystathionine γ-lyase (CSE), cystathionine β-synthase (CBS) or 3-mercaptopyruvate sulfurtransferase (3-MST). The mechanism(s) involved in H₂S-gastroprotection against ischemia/reperfusion (I/R) lesions and their time-dependent progression into deeper gastric ulcerations have been little studied. We determined the effect of l-cysteine, H₂S-releasing NaHS or slow H₂S releasing compound GYY4137 on gastric blood flow (GBF) and gastric lesions induced by 30 min of I followed by 3, 6, 24 and 48 h of R...
February 15, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28211240/phenotypic-spectrum-of-charcot-marie-tooth-disease-due-to-litaf-simple-mutations-a-study-of-18-patients
#16
R Guimarães-Costa, R Iancu Ferfoglia, S Leonard-Louis, F Ziegler, L Magy, E Fournier, O Dubourg, P Bouche, T Maisonobe, A Lacour, A Moerman, P Latour, T Stojkovic
BACKGROUND AND PURPOSE: Charcot-Marie-Tooth (CMT) 1C due to mutations in LITAF/SIMPLE is a rare subtype amongst the autosomal dominant demyelinating forms of CMT. Our objective was to report the clinical and electrophysiological characteristics of 18 CMT1C patients and compare them to 20 patients with PMP22 mutations: 10 CMT1A patients and 10 patients with hereditary neuropathy with liability to pressure palsies (HNPP). METHODS: Charcot-Marie-Tooth 1C patients were followed-up in referral centres for neuromuscular diseases or were identified by familial survey...
March 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/28210404/infraorbital-nerve-decompression-for-infraorbital-neuralgia-causalgia-following-blowout-orbital-fractures-a-case-series
#17
Bijan Beigi, Mazda Beigi, Nuwan Niyadurupola, Manuel Saldana, Nabil El-Hindy, Deepak Gupta
The purpose of this study was to present the management of a series of patients referred with infraorbital nerve paraesthesia that developed after insignificant orbital floor fracture without diplopia or exophthalmos, and that did not require initial surgical repair. This is a retrospective interventional case series. The main outcome and measures were assessment of preoperative symptoms including neuralgia and sensory symptoms; review of periorbital computed tomography (CT) scans; and assessment of postoperative effects of surgery for infraorbital nerve decompression...
March 2017: Craniomaxillofacial Trauma & Reconstruction
https://www.readbyqxmd.com/read/28210177/orbital-reconstruction-with-a-partially-absorbable-mesh-monofilament-polypropylene-fibre-and-monofilament-poliglecaprone-25-our-experience-with-34-patients
#18
Moustafa Alkhalil, J Joshi Otero
PURPOSE: To evaluate the effectiveness and complications related to the use of a partially absorbable mesh for the reconstruction of orbital floor fractures. This is a retrospective review of 34 consecutive patients who suffered orbital trauma from August 2007 to March 2013 treated with a partially absorbable mesh for orbital reconstruction. Data collected included gender, age, nationality, cause of injury, date of admission, date of surgery, date of discharge, type of fracture, signs and symptoms such as diplopia, enophthalmos, and sensory disturbance related to the infraorbital nerve, complications before and after surgery, and follow-ups at 1 week, 1 month, 6 months, and after 1 year...
July 2016: Saudi Journal of Ophthalmology: Official Journal of the Saudi Ophthalmological Society
https://www.readbyqxmd.com/read/28208978/a-randomized-controlled-study-of-0-5-bupivacaine-0-5-ropivacaine-and-0-75-ropivacaine-for-supraclavicular-brachial-plexus-block
#19
Ranjan R Venkatesh, Prabhat Kumar, Ramachandran R Trissur, Sagiev Koshy George
INTRODUCTION: For any surgery in the upper extremity that does not involve the shoulder, a supraclavicular block is preferred, as it is a safe procedure associated with rapid onset and reliable anaesthesia. Although ropivacaine has been extensively studied for epidural anaesthesia, very few reports exist on its use in supraclavicular brachial plexus block. AIM: This study was conducted to investigate and compare the effectiveness of supraclavicular brachial plexus anaesthesia with two different concentrations of ropivacaine (0...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28205252/sensory-deficits-after-a-radial-nerve-injury
#20
Jayme Augusto Bertelli, Erica Cavalli, Vera Lúcia Mendes Lehn, Marcos Flávio Ghizoni
BACKGROUND: The aim of our study was to objectively test sensibility on the dorsal side of the hand in patients with radial nerve injury, to document deficits and to detect if surgery for sensory reconstruction is needed. METHODS: Nineteen patients of mean age 31 ± 10 years were examined at a mean of 26.4 ± 27.8 months post radial nerve injury. Sensory mechanical thresholds on the dorsal surface of the hand were evaluated using Semmes-Weinstein monofilaments...
February 16, 2017: Microsurgery
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