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Nerve conduction study

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https://www.readbyqxmd.com/read/28719827/mixed-evidence-for-the-potential-of-non-invasive-transcutaneous-vagal-nerve-stimulation-to-improve-the-extinction-and-retention-of-fear
#1
A M Burger, B Verkuil, H Fenlon, L Thijs, L Cools, H C Miller, B Vervliet, I Van Diest
Extinction memories are fragile and their formation has been proposed to partially rely on vagus nerve activity. We tested whether stimulating the auricular branch of the vagus (transcutaneous VNS; tVNS) accelerates extinction and reduces spontaneous recovery of fear. Forty-two healthy students participated in a 3-day fear conditioning study, where we tested fear acquisition (day 1), fear extinction (day 2) and the retention of the extinction memory (day 3). During extinction, participants were randomly allocated to receive tVNS or sham stimulation concurrently with each CS presentation...
July 8, 2017: Behaviour Research and Therapy
https://www.readbyqxmd.com/read/28719826/the-terminal-latency-of-the-phrenic-nerve-correlates-with-respiratory-symptoms-in-amyotrophic-lateral-sclerosis
#2
Jin-Sung Park, Donghwi Park
OBJECTIVE: The aim of the study was to investigate the electrophysiological parameters in phrenic nerve conduction studies (NCS) that sensitively reflect latent respiratory insufficiency present in amyotrophic lateral sclerosis (ALS). METHOD: Forty-nine patients with ALS were examined, and after exclusion, 21 patients with ALS and their phrenic NCS results were reviewed. The patients were divided into two groups according to their respiratory sub-score in the ALS functional rating scale - revised (Group A, sub-score 12vs...
July 1, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28719619/diagnostic-utility-of-corneal-confocal-microscopy-and-intra-epidermal-nerve-fibre-density-in-diabetic-neuropathy
#3
Uazman Alam, Maria Jeziorska, Ioannis N Petropoulos, Omar Asghar, Hassan Fadavi, Georgios Ponirakis, Andrew Marshall, Mitra Tavakoli, Andrew J M Boulton, Nathan Efron, Rayaz A Malik
OBJECTIVES: Corneal confocal microscopy (CCM) is a rapid, non-invasive, reproducible technique that quantifies small nerve fibres. We have compared the diagnostic capability of CCM against a range of established measures of nerve damage in patients with diabetic neuropathy. METHODS: In this cross sectional study, thirty subjects with Type 1 diabetes without neuropathy (T1DM), thirty one T1DM subjects with neuropathy (DSPN) and twenty seven non-diabetic healthy control subjects underwent detailed assessment of neuropathic symptoms and neurologic deficits, quantitative sensory testing (QST), electrophysiology, skin biopsy and corneal confocal microscopy (CCM)...
2017: PloS One
https://www.readbyqxmd.com/read/28719404/predictive-factors-for-hearing-outcomes-after-canaloplasty-in-patients-with-congenital-aural-atresia
#4
Jungmin Ahn, Sun Young Baek, Kyunga Kim, Yang-Sun Cho
OBJECTIVE: The aim of this study was to determine the most important factors in preoperative imaging, including components of Jahrsdoefer score (J score), and favorable prognostic factors for postoperative hearing results after canaloplasty for congenital aural atresia. STUDY DESIGN: Retrospective review of medical records. SETTING, PATIENTS, INTERVENTION, MAIN OUTCOME MEASURE: One hundred eight patients who underwent canaloplasty by a single surgeon between January 2011 and July 2014 were included...
July 17, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28718615/development-of-nanofiber-sponges-containing-nerve-guidance-conduit-for-peripheral-nerve-regeneration-in-vivo
#5
Binbin Sun, Zi-Fei Zhou, Tong Wu, Weiming Chen, Dawei Li, Hao Zheng, Hany El-Hamshary, Salem S Al-Deyab, Xiumei Mo, Yinxian Yu
In the study of hollow nerve guidance conduit (NGC), the dispersion of regenerated axons always confused the researchers. To address this problem, filler-containing NGC was prepared, which showed better effect in the application of nerve tissue engineering. In this study, nanofiber sponges with abundant macro-pores, high porosity, and superior compressive strength were fabricated by electrospinning and freeze-drying. Poly (l-lactic acid-co-ε-caprolactone)/silk fibroin (PLCL/SF) nanofiber sponges were used as filler to prepare three-dimensional nanofiber sponges-containing (NS-containing) NGC...
July 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28717288/cone-beam-computed-tomographic-analysis-of-the-course-and-position-of-mandibular-canal
#6
Hooman Khorshidi, Saeed Raoofi, Janan Ghapanchi, Shoaleh Shahidi, Maryam Paknahad
PURPOSE: Estimation of the relative position of infra alveolar nerve (IAN) canal and its relation to the mandibular anatomical landmarks can be clinically useful in minimizing the risk of surgery complications such as neurosensory disturbances that may occur after invasive mandibular surgical procedures. The purpose of the present study was to investigate the anatomic location and radiographic course of the mandibular canal compared to anatomic landmarks on CBCT and to discuss its clinical significance and also to determine the possible correlations between the mandibular position and the age of the patients...
September 2017: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/28717090/delayed-polyneuropathy-induced-by-organophosphate-poisoning
#7
Shunsuke Kobayashi, Reiko Okubo, Yoshikazu Ugawa
An 89-year-old man attempted suicide by ingesting a pesticide (trichlorfon). After surviving the initial critical period in the intensive care unit, he developed rapidly progressive distal weakness and sensory disturbance. Electrophysiological examinations revealed sensory motor axonal polyneuropathy. Delayed polyneuropathy is a rare manifestation of organophosphate poisoning. Nerve conduction studies play an important role in the diagnosis of this rare clinical condition.
2017: Internal Medicine
https://www.readbyqxmd.com/read/28715809/thyroid-surgery-to-drain-or-not-to-drain-that-is-the-problem-a-randomized-clinical-trial
#8
Mario Schietroma, Beatrice Pessia, Zuleyka Bianchi, Fabiola De Vita, Francesco Carlei, Stefano Guadagni, Gianfranco Amicucci, Marco Clementi
PURPOSE: We conducted a prospective, randomized study to evaluate the necessity of drainage after thyroid surgery. METHODS: The patients (n = 215) were randomly assigned to be treated with suction drains (group 1; n = 108) or not (group 2; n = 107). RESULTS: The postoperative pain scores were significantly lower in the non-drained group than in the drained group of patients at postoperative days 0 and at 1. Hematomas, seromas, wound infections, transient biochemical hypoparathyroidism, and transient damage of the recurrent laryngeal nerve occurred more frequently in the drained group than in the non-drained group...
July 15, 2017: ORL; Journal for Oto-rhino-laryngology and its related Specialties
https://www.readbyqxmd.com/read/28715393/generation-and-long-term-maintenance-of-nerve-free-hydra
#9
Cassidy M Tran, Sharon Fu, Trevor Rowe, Eva-Maria S Collins
The interstitial cell lineage of Hydra includes multipotent stem cells, and their derivatives: gland cells, nematocytes, germ cells, and nerve cells. The interstitial cells can be eliminated through two consecutive treatments with colchicine, a plant-derived toxin that kills dividing cells, thus erasing the potential for renewal of the differentiated cells that are derived from the interstitial stem cells. This allows for the generation of Hydra that lack nerve cells. A nerve-free polyp cannot open its mouth to feed, egest, or regulate osmotic pressure...
July 7, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28713530/are-cerebrospinal-fluid-protein-levels-and-plasma-neutrophil-lymphocyte-ratio-associated-with-prognosis-of-guillain-barr%C3%A3-syndrome
#10
Sevki Sahin, Nilgun Cinar, Sibel Karsidag
Guillain Barré syndrome (GBS) is a post-infectious acute autoimmune polyradiculopathy. Cerebrospinal fluid (CSF) total protein level and plasma neutrophil/lymphocyte ratio (NLR) are related with autoimmune response. We aimed to reach a prognostic indicator for GBS by using electrophysiological findings, protein level of CSF, and plasma NLR based on Medical Research Council (MRC) sum score data. Cases who met diagnostic criteria of GBS and followed at least six months were enrolled in the study. Nerve conduction study (NCS) and lumbar puncture were performed one week after symptom onset...
June 23, 2017: Neurology International
https://www.readbyqxmd.com/read/28713051/3d-visualization-and-pathological-characteristics-of-cartilage-and-subchondral-bone-changes-in-the-lumbar-facet-joint-of-an-ovariectomized-mouse-model
#11
Yong Cao, Shuangfei Ni, Tianding Wu, Chunyue Duan, Shenghui Liao, Jianzhong Hu
BACKGROUD CONTEXT: Low back pain (LBP) is more prevalent among postmenopausal women than men. Ovariectomy (OVX) is an established animal model that mimics the estrogen deficiency of postmenopausal women. Little is known about the morphological properties of cartilage and subchondral bone changes in the lumbar facet joint (LFJ) of an OVX mouse model. PURPOSE: The purpose of this study is to characterize the morphological change of cartilage and subchondral bone in LFJ of an OVX mouse model...
July 13, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28712672/noise-induced-cochlear-synaptopathy-in-rhesus-monkeys-macaca-mulatta
#12
M D Valero, J A Burton, S N Hauser, T A Hackett, R Ramachandran, M C Liberman
Cochlear synaptopathy can result from various insults, including acoustic trauma, aging, ototoxicity, or chronic conductive hearing loss. For example, moderate noise exposure in mice can destroy up to ∼50% of synapses between auditory nerve fibers (ANFs) and inner hair cells (IHCs) without affecting outer hair cells (OHCs) or thresholds, because the synaptopathy occurs first in high-threshold ANFs. However, the fiber loss likely impairs temporal processing and hearing-in-noise, a classic complaint of those with sensorineural hearing loss...
July 8, 2017: Hearing Research
https://www.readbyqxmd.com/read/28710923/diagnostic-utility-of-distal-nerve-conduction-studies-and-sural-near-nerve-needle-recording-in-polyneuropathy
#13
Mustafa Aykut Kural, Páll Karlsson, Kirsten Pugdahl, Baris Isak, Anders Fuglsang-Frederiksen, Hatice Tankisi
OBJECTIVE: The electrodiagnosis of polyneuropathy (PNP) may benefit from examination using near-nerve needle technique (NNT) and from inclusion of distal nerves. This study compared the diagnostic utility of distal nerve conduction studies (NCS) and NNT recording. METHODS: Bilateral NNT and surface recording of the sural nerve and surface recording of the dorsal sural and medial plantar nerves were prospectively done in 91 patients with clinically suspected PNP...
June 27, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28710191/unusual-sensory-variant-of-guillain-barr%C3%A3-syndrome
#14
Milena Semproni, Gillian Gibson, Laura Kuyper, Penny Tam
We describe a 52-year-old woman presenting with acute onset of severe burning paraesthesia in the hands and feet associated with allodynia and antalgic gait. At the time of admission to hospital no motor weakness was present. A diagnosis of Guillain-Barré syndrome (GBS) was considered when neurophysiological studies were completed showing convincing evidence of demyelination on motor conduction studies and sural sparing on sensory nerve studies.(1) We describe this case as a sensory variant of GBS. Clinical improvement followed treatment with a single course of intravenous immunoglobulin (IVIG)...
July 14, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28709447/cryptic-amyloidogenic-elements-in-mutant-nefh-causing-charcot-marie-tooth-2-trigger-aggresome-formation-and-neuronal-death
#15
Arnaud Jacquier, Cécile Delorme, Edwige Belotti, Raoul Juntas-Morales, Guilhem Solé, Odile Dubourg, Marianne Giroux, Claude-Alain Maurage, Valérie Castellani, Adriana Rebelo, Alexander Abrams, Stephan Züchner, Tanya Stojkovic, Laurent Schaeffer, Philippe Latour
Neurofilament heavy chain (NEFH) gene was recently identified to cause autosomal dominant axonal Charcot-Marie-Tooth disease (CMT2cc). However, the clinical spectrum of this condition and the physio-pathological pathway remain to be delineated. We report 12 patients from two French families with axonal dominantly inherited form of CMT caused by two new mutations in the NEFH gene. A remarkable feature was the early involvement of proximal muscles of the lower limbs associated with pyramidal signs in some patients...
July 14, 2017: Acta Neuropathologica Communications
https://www.readbyqxmd.com/read/28708635/the-management-of-pediatric-hearing-loss-caused-by-auditory-neuropathy-spectrum-disorder
#16
Nguyen S Pham
PURPOSE OF REVIEW: Auditory neuropathy spectrum disorder (ANSD) is a condition in which auditory testing reveals normal otoacoustic emissions, but auditory brainstem testing is abnormal or absent and speech discrimination is poor. This constellation of findings ostensibly suggests that the cochlea is healthy and an abnormality of conduction or processing of sound occurs along the nerve fibers. As more is learned about this condition, it is becoming clear that ANSD describes heterogeneous, distinct clinical entities that must be taken into account when devising treatment modalities...
July 13, 2017: Current Opinion in Otolaryngology & Head and Neck Surgery
https://www.readbyqxmd.com/read/28708475/prevalence-and-length-of-the-anterior-loop-of-the-inferior-alveolar-nerve-in-iranians
#17
Mahsa Shariati, Maryam Rastegar Moghddam, Zeinab Davoudmanesh, Nasim Azizi, Vahid Rakhshan
The anterior loop of the inferior alveolar nerve is a sensitive anatomical feature which should be taken into account during installing dental implants anterior to the mental foramen. Since results regarding its prevalence and length are controversial, this study was conducted. A total of 452 mandible quadrants of 234 patients (age: 50.1±13.3 years, 113 males, 121 females) were studied using cone-beam computerized tomography (CBCT). After reconstructing axial, frontal, and sagittal slices, the region between the most anterior point on the mental foramen and the most anterior part of the mandibular nerve was inspected for signs of anterior loop presence...
July 14, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/28708008/long-term-follow-up-of-intractable-chronic-short-lasting-unilateral-neuralgiform-headache-disorders-treated-with-occipital-nerve-stimulation
#18
Sarah Miller, Laurence Watkins, Manjit Matharu
Background Occipital nerve stimulation is a potential treatment option for medically intractable short-lasting unilateral neuralgiform headache attacks. We present long-term outcomes in 31 patients with short-lasting unilateral neuralgiform headache attacks treated with occipital nerve stimulation in an uncontrolled open-label prospective study. Methods Thirty-one patients with intractable short-lasting unilateral neuralgiform headache attacks were treated with bilateral occipital nerve stimulation from 2007 to 2015...
January 1, 2017: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/28702450/effects-of-taping-therapy-for-carpal-space-expansion-on-electrophysiological-change-in-patients-with-carpal-tunnel-syndrome
#19
Yeong-Dong Park, Yun-Jin Park, Sang-Seo Park, Hae-Lim Lee, Hyeong-Hun Moon, Myung-Ki Kim
Taping therapy is one of the most conservative treatments for carpal tunnel syndrome (CTS). Preceding research studied on pain control, grip strength, and wrist function but no studies have been reported on electrophysiolgical changes after taping therapy. The aim of this study is to evaluate the effects of taping therapy for carpal space expansion on electrophysiological in 20 female patients aged from 40s to 60s with CTS. Experimental group applied taping therapy for carpal space expansion twice a week for 4 weeks and control group did not...
June 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/28702348/predicting-pain-relief-use-of-pre-surgical-trigeminal-nerve-diffusion-metrics-in-trigeminal-neuralgia
#20
Peter S-P Hung, David Q Chen, Karen D Davis, Jidan Zhong, Mojgan Hodaie
Trigeminal neuralgia (TN) is a chronic neuropathic facial pain disorder that commonly responds to surgery. A proportion of patients, however, do not benefit and suffer ongoing pain. There are currently no imaging tools that permit the prediction of treatment response. To address this paucity, we used diffusion tensor imaging (DTI) to determine whether pre-surgical trigeminal nerve microstructural diffusivities can prognosticate response to TN treatment. In 31 TN patients and 16 healthy controls, multi-tensor tractography was used to extract DTI-derived metrics-axial (AD), radial (RD), mean diffusivity (MD), and fractional anisotropy (FA)-from the cisternal segment, root entry zone and pontine segment of trigeminal nerves for false discovery rate-corrected Student's t-tests...
2017: NeuroImage: Clinical
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