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Small fibre neuropathy

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https://www.readbyqxmd.com/read/28330489/profiling-intraoral-neuropathic-disturbances-following-lingual-nerve-injury-and-in-burning-mouth-syndrome
#1
Amely Hartmann, Robin Seeberger, Malte Bittner, Roman Rolke, Claudia Welte-Jzyk, Monika Daubländer
BACKGROUND: The aim of the study was to analyse intraoral neurophysiological changes in patients with unilateral lingual nerve lesions as well as patients with Burning Mouth Syndrome (BMS) by applying a standardized Quantitative Sensory Testing (QST) protocol. METHODS: The study included patients suffering from a peripheral lesion of the lingual nerve (n = 4), from BMS (n = 5) and healthy controls (n = 8). Neurophysiological tests were performed in the innervation areas of the tongue bilaterally...
March 23, 2017: BMC Oral Health
https://www.readbyqxmd.com/read/28327408/improvement-in-small-fibre-neuropathy-and-inflammatory-biomarkers-after-bariatric-surgery
#2
Tarza J Siahmansur, Yifen Liu, Shazli Azmi, Maryam Ferdousi, Philip Pemberton, Safwaan Adam, Jonathan D Schofield, Akheel A Syed, Basil Ammori, Rayaz Malik, Paul N Durrington, Handrean Soran
No abstract text is available yet for this article.
December 2016: Atherosclerosis
https://www.readbyqxmd.com/read/28303912/new-technologies-for-the-assessment-of-neuropathies
#3
REVIEW
Roberto Gasparotti, Luca Padua, Chiara Briani, Giuseppe Lauria
Technical advances are rapidly changing the clinical and instrumental approach to peripheral nerve diseases. Magnetic resonance neurography, diffusion tensor imaging and nerve ultrasonography are increasingly entering the diagnostic workup of peripheral neuropathies as tools that complement neurophysiology and enable investigation of proximal structures, such as plexuses and roots. Progress in the design of magnetic resonance scanners and sequences, and the development of high-frequency ultrasound probes mean that high-resolution peripheral nerve imaging is possible, enabling detailed examination of nerve size, morphology and internal fascicular structure that can integrate nerve conduction studies into clinical practice...
March 17, 2017: Nature Reviews. Neurology
https://www.readbyqxmd.com/read/28272773/comparative-rna-seq-transcriptome-analyses-reveal-distinct-metabolic-pathways-in-diabetic-nerve-and-kidney-disease
#4
Lucy M Hinder, Meeyoung Park, Amy E Rumora, Junguk Hur, Felix Eichinger, Subramaniam Pennathur, Matthias Kretzler, Frank C Brosius, Eva L Feldman
Treating insulin resistance with pioglitazone normalizes renal function and improves small nerve fibre function and architecture; however, it does not affect large myelinated nerve fibre function in mouse models of type 2 diabetes (T2DM), indicating that pioglitazone affects the body in a tissue-specific manner. To identify distinct molecular pathways regulating diabetic peripheral neuropathy (DPN) and nephropathy (DN), as well those affected by pioglitazone, we assessed DPN and DN gene transcript expression in control and diabetic mice with or without pioglitazone treatment...
March 8, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28267059/diagnostic-accuracy-of-laser-evoked-potentials-in-diabetic-neuropathy
#5
G Di Stefano, S La Cesa, C Leone, A Pepe, E Galosi, M Fiorelli, M Valeriani, M Lacerenza, M Pergolini, A Biasiotta, G Cruccu, A Truini
Although the most widely agreed neurophysiological tool for investigating small fibre damage is laser evoked potential (LEP) recording, no study has documented its diagnostic accuracy. In this clinical, neurophysiological and skin biopsy study we collected age-corrected LEP normative ranges, verified the association of LEPs with pinprick sensory disturbances in the typical diabetic mixed-fibre polyneuropathy and assessed the sensitivity and specificity of LEPs in diabetic small-fibre neuropathy.From 288 LEP recordings from the face, hand and foot in 73 healthy subjects we collected age-corrected normative ranges for LEPs...
March 4, 2017: Pain
https://www.readbyqxmd.com/read/28259159/measurement-properties-of-paindetect-rasch-analysis-of-responses-from-community-dwelling-adults-with-neuropathic-pain
#6
Tara L Packham, Joseph C Cappelleri, Alesia Sadosky, Joy C MacDermid, Florian Brunner
BACKGROUND: painDETECT (PD-Q) is a self-reported assessment of pain qualities developed as a screening tool for pain of neuropathic origin. Rasch analysis is a strategy for examining the measurement characteristics of a scale using a form of item response theory. We conducted a Rasch analysis to consider if the scoring and measurement properties of PD-Q would support its use as an outcome measure. METHODS: Rasch analysis was conducted on PD-Q scores drawn from a cross-sectional study of the burden and costs of NeP...
March 4, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28235406/network-topology-of-nav1-7-mutations-in-sodium-channel-related-painful-disorders
#7
Dimos Kapetis, Jenny Sassone, Yang Yang, Barbara Galbardi, Markos N Xenakis, Ronald L Westra, Radek Szklarczyk, Patrick Lindsey, Catharina G Faber, Monique Gerrits, Ingemar S J Merkies, Sulayman D Dib-Hajj, Massimo Mantegazza, Stephen G Waxman, Giuseppe Lauria
BACKGROUND: Gain-of-function mutations in SCN9A gene that encodes the voltage-gated sodium channel NaV1.7 have been associated with a wide spectrum of painful syndromes in humans including inherited erythromelalgia, paroxysmal extreme pain disorder and small fibre neuropathy. These mutations change the biophysical properties of NaV1.7 channels leading to hyperexcitability of dorsal root ganglion nociceptors and pain symptoms. There is a need for better understanding of how gain-of-function mutations alter the atomic structure of Nav1...
February 24, 2017: BMC Systems Biology
https://www.readbyqxmd.com/read/28202580/spinal-disinhibition-in-experimental-and-clinical-painful-diabetic-neuropathy
#8
Andrew G Marshall, Corinne Lee-Kubli, Shazli Azmi, Michael Zhang, Maryam Ferdousi, Teresa Mixcoatl-Zecuatl, Ioannis N Petropoulos, Georgios Ponirakis, Mark S Fineman, Hassan Fadavi, Katie Frizzi, Mitra Tavakoli, Maria Jeziorska, Corinne G Jolivalt, Andrew J M Boulton, Nathan Efron, Nigel A Calcutt, Rayaz A Malik
Impaired rate dependent depression (RDD) of the Hoffman-reflex is associated with reduced dorsal spinal cord potassium chloride co-transporter expression and impaired spinal GABAA receptor function, indicative of spinal inhibitory dysfunction. We have investigated the pathogenesis of impaired RDD in diabetic rodents exhibiting features of painful neuropathy and the translational potential of this marker of spinal inhibitory dysfunction in human painful diabetic neuropathy. Impaired RDD and allodynia were present in type 1 and type 2 diabetic rats but not in rats with type 1 diabetes receiving insulin supplementation that did not restore normoglycemia...
February 15, 2017: Diabetes
https://www.readbyqxmd.com/read/28103405/altered-walking-strategy-and-increased-unsteadiness-in-participants-with-impaired-glucose-tolerance-and-type-2-diabetes-relates-to-small-fibre-neuropathy-but-not-vitamin-d-deficiency
#9
M M Almurdhi, S J Brown, F L Bowling, A J M Boulton, M Jeziorska, R A Malik, N D Reeves
AIMS: To investigate alterations in walking strategy and dynamic sway (unsteadiness) in people with impaired glucose tolerance and people with Type 2 diabetes in relation to severity of neuropathy and vitamin D levels. METHODS: A total of 20 people with Type 2 diabetes, 20 people with impaired glucose tolerance and 20 people without either Type 2 diabetes or impaired glucose tolerance (control group) underwent gait analysis using a motion analysis system and force platforms, and detailed assessment of neuropathy and serum 25 hydroxy-vitamin D levels...
January 19, 2017: Diabetic Medicine: a Journal of the British Diabetic Association
https://www.readbyqxmd.com/read/28073787/col6a5-variants-in-familial-neuropathic-chronic-itch
#10
Filippo Martinelli-Boneschi, Marina Colombi, Marco Castori, Grazia Devigili, Roberto Eleopra, Rayaz A Malik, Marco Ritelli, Nicoletta Zoppi, Chiara Dordoni, Melissa Sorosina, Paola Grammatico, Hassan Fadavi, Monique M Gerrits, Rowida Almomani, Catharina G Faber, Ingemar S J Merkies, Daniela Toniolo, Massimiliano Cocca, Claudio Doglioni, Stephen G Waxman, Sulayman D Dib-Hajj, Michela M Taiana, Jenny Sassone, Raffaella Lombardi, Daniele Cazzato, Andrea Zauli, Silvia Santoro, Margherita Marchi, Giuseppe Lauria
Itch is thought to represent the peculiar response to stimuli conveyed by somatosensory pathways shared with pain through the activation of specific neurons and receptors. It can occur in association with dermatological, systemic and neurological diseases, or be the side effect of certain drugs. However, some patients suffer from chronic idiopathic itch that is frequently ascribed to psychological distress and for which no biomarker is available to date. We investigated three multigenerational families, one of which diagnosed with joint hypermobility syndrome/Ehlers-Danlos syndrome hypermobility type (JHS/EDS-HT), characterized by idiopathic chronic itch with predominantly proximal distribution...
January 9, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/27878441/long-term-treatment-of-transthyretin-familial-amyloid-polyneuropathy-with-tafamidis-a-clinical-and-neurophysiological-study
#11
Violaine Planté-Bordeneuve, Farida Gorram, Hayet Salhi, Tarik Nordine, Samar S Ayache, Philippe Le Corvoisier, Daniel Azoulay, Cyrille Feray, Thibaud Damy, Jean-Pascal Lefaucheur
Tafamidis is a transthyretin (TTR) stabilizer recently approved to slow the neurologic impairment in TTR familial amyloid polyneuropathy (TTR-FAP). The pivotal studies on Tafamidis reported encouraging results on the short term, in the early onset Val30Met-TTR-FAP patients at an early stage of the neuropathy. However, the effect of the drug in the non-Val30Met patients, at a more advanced stage of the disease and on the long term, is less known. In this study, we report the effect of Tafamidis in 43 TTR-FAP patients with a variety of pathogenic mutations, including 53% of non-Val30Met variants, at different stages of neuropathy followed on the long term...
November 22, 2016: Journal of Neurology
https://www.readbyqxmd.com/read/27859794/the-perception-of-affective-touch-in-parkinson-s-disease-and-its-relation-to-small-fibre-neuropathy
#12
Lewis Kass-Iliyya, Matthew Leung, Andrew Marshall, Paula Trotter, Christopher Kobylecki, Susannah Walker, David Gosal, Maria Jeziorska, Rayaz A Malik, Francis McGlone, Monty A Silverdale
Affective touch sensation is conducted by a sub-class of C-fibres in hairy skin known as C-Tactile (CT) afferents. CT afferents respond maximally to gentle skin stroking at velocities between 1 and 10 cm/s. Parkinson's disease (PD) is characterised by markedly reduced cutaneous C-fibres. It is not known if affective touch perception is influenced by C-fibre density and if affective touch is impaired in PD compared to healthy controls. We predicted that perceived pleasantness to gentle stroking in PD would correlate with C-afferent density and that affective touch perception would be impaired in PD compared to healthy controls...
January 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/27793437/familial-amyloidosis-with-polyneuropathy-type-1-caused-by-transthyretin-mutation-val50met-val30met-4-cases-in-a-non-endemic-area
#13
N Andrés, J J Poza, J F Martí Massó
INTRODUCTION: Transthyretin-related familial amyloid polyneuropathy (TTR-FAP) typically arises as an autonomic neuropathy primarily affecting small fibres and it occurs in adult patients in their second or third decades of life. It progresses rapidly and can lead to death in approximately 10 years. Other phenotypes have been described in non-endemic areas. OBJECTIVES AND METHODS: We described 4 cases from the Spanish province of Guipuzcoa, a non-endemic area, to highlight the clinical variability of this disease...
October 26, 2016: Neurología: Publicación Oficial de la Sociedad Española de Neurología
https://www.readbyqxmd.com/read/27783183/association-of-sudomotor-function-with-peripheral-artery-disease-in-type-2-diabetes
#14
Simran Chahal, Kanchan Vohra, Ashit Syngle
Peripheral artery disease (PAD) is the major risk factor for cardiovascular disease and lower extremity amputation in patients with diabetes. Autonomic neuropathy is a risk factor for cardiovascular-related morbidity and mortality. Sudomotor dysfunction is well established in type 2 diabetes mellitus (T2DM) and reflects small fibre neuropathy, cardiovascular autonomic neuropathy and peripheral sympathetic autonomic neuropathy. However, the relationship between sudomotor dysfunction and PAD remains unexplored...
January 2017: Neurological Sciences
https://www.readbyqxmd.com/read/27682209/a-rodent-model-of-hiv-protease-inhibitor-indinavir-induced-peripheral-neuropathy
#15
Wenlong Huang, Margarita Calvo, Tim Pheby, David L H Bennett, Andrew S C Rice
HIV-associated sensory neuropathy (HIV-SN) is the most frequent manifestation of HIV disease. It often presents with significant neuropathic pain and is associated with previous exposure to neurotoxic nucleoside reverse transcriptase inhibitors. However, HIV-SN prevalence remains high even in resource-rich settings where these drugs are no longer used. Previous evidence suggests that exposure to indinavir, a protease inhibitor commonly used in antiretroviral therapy, may link to elevated HIV-SN risk. Here, we investigated whether indinavir treatment was associated with the development of a "dying back" axonal neuropathy and changes in pain-relevant limb withdrawal and thigmotactic behaviours...
January 2017: Pain
https://www.readbyqxmd.com/read/27666897/sle-neuropathy-anything-new
#16
Vikram A Londhey
SLE (systemic lupus erythematosus) is a multisystem autoimmune disorder of unknown aetiology which can present with myriad clinical presentation. The neurological manifestations of SLE consist of central nervous system (CNS) and peripheral nervous system manifestations (PNS). The CNS manifestations are aseptic meningitis, cerebrovascular accidents (stroke), demyelinating disorders, headache, involuntary movements like chorea, myelopathy, acute confusional states, cognitive dysfunction, mood disorder, seizures, psychosis and cranial nerve palsies...
December 2015: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/27660311/clinical-challenges-in-the-diagnosis-and-management-of-postural-tachycardia-syndrome
#17
Pearl K Jones, Brett H Shaw, Satish R Raj
Postural tachycardia syndrome (POTS) is a multifactorial clinical syndrome defined by an increase in heart rate of ≥30 bpm on standing from supine position (or ≥40 bpm in children). It is associated with symptoms of cerebral hypoperfusion that are worse when upright and improve when in supine position. Patients often have additional symptoms including severe fatigue and difficulty concentrating. There are several possible pathophysiologic mechanisms including hypovolaemia, small-fibre peripheral neuropathy and hyperadrenergic states...
December 2016: Practical Neurology
https://www.readbyqxmd.com/read/27571910/double-trouble-para-neoplastic-anti-pca-2-and-crmp-5-mediated-small-fibre-neuropathy-followed-by-chorea-associated-with-small-cell-lung-cancer-and-evolving-radiological-features
#18
Waqar Waheed, James Boyd, Farrah Khan, Sharon L Mount, Neil M Borden, Rup Tandan
Patients with Purkinje cell cytoplasmic autoantibody type 2 (PCA-2) and collapsin response-mediator protein-5 (CRMP-5) autoantibody can present with multifocal elements of encephalomyeloneuropathy. Except for an anecdotal report, case descriptions of paraneoplastic small fibre neuropathy are lacking. We report paraneoplastic small fibre neuropathy followed by chorea associated with small cell lung cancer. A man aged 57 years with a 35 pack-year smoking history presented with painless subacute paresthesia and weight fluctuation...
August 29, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27503742/familial-gain-of-function-nav1-9-mutation-in-a-painful-channelopathy
#19
Chongyang Han, Yang Yang, Rene H Te Morsche, Joost P H Drenth, Juan M Politei, Stephen G Waxman, Sulayman D Dib-Hajj
OBJECTIVE: Gain-of-function mutations in Nav1.9 have been identified in three families with rare heritable pain disorders, and in patients with painful small-fibre neuropathy. Identification and functional assessment of new Nav1.9 mutations will help to elucidate the phenotypic spectrum of Nav1.9 channelopathies. METHODS: Patients from a large family with early-onset pain symptoms were evaluated by clinical examination and genomic screening for mutations in SCN9A and SCN11A...
March 2017: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/27449322/negative-neurodynamic-tests-do-not-exclude-neural-dysfunction-in-patients-with-entrapment-neuropathies
#20
Larissa T Baselgia, David L Bennett, Robert M Silbiger, Annina B Schmid
OBJECTIVE: To examine differences in somatosensory phenotypes of patients with positive and negative neurodynamic tests and compare these with healthy participants. DESIGN: Case-control study. SETTING: University department. PARTICIPANTS: Patients with electrodiagnostically confirmed carpal tunnel syndrome (CTS) (n=53) and people without CTS (n=26) participated in this study (N=79). Patients with CTS were subgrouped according to the results of the upper limb neurodynamic tests biasing the median nerve into patients with positive or negative neurodynamic tests...
March 2017: Archives of Physical Medicine and Rehabilitation
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