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https://www.readbyqxmd.com/read/28430708/the-somatosensory-evoked-potential-in-reaction-time-is-gated-and-elicited-earlier-when-the-motor-response-to-a-somatosensory-cue-is-faster
#1
Koichi Hiraoka, Chisato Kori, Kana Sato
The aim of this study was to investigate whether the somatosensory-evoked potential (SEP) is gated and elicited earlier when a motor response to a somatosensory stimulus is faster. In healthy humans, the left index finger and thumb were pinched in response to a somatosensory stimulus administered over the left median nerve. The SEP elicited by this stimulus when producing a fast motor response was compared with that when producing a slow motor response. The amplitudes of N18 and frontal P40 when producing a fast motor response were smaller than those when producing a slow motor response...
April 20, 2017: Neuroreport
https://www.readbyqxmd.com/read/28429852/anti-inflammatory-and-retinal-protective-effects-of-capsaicin-on-ischemia-induced-injuries-through-the-release-of-endogenous-somatostatin
#2
Jun Wang, Wenke Tian, Shuaiwei Wang, Wenqiang Wei, Dongdong Wu, Honggang Wang, Li Wang, Ruisheng Yang, Ailing Ji, Yanzhang Li
The mechanisms regarding the retinal protective and anti-inflammatory effects of capsaicin (CAP) remain unclear. Somatostatin is contained in CAP-sensitive sensory neurons, including nerve terminals, from which it can be released by capsaicin. The present study provides a novel neurohumoral regulatory mechanism for CAP-induced-endogenous somatostatin in a retinal ischemic-reperfusion (I/R) mouse model. CAP (0.5 mg kg(-1) ) was injected subcutaneously 5 min after I/R. A selective somatostatin-depleting agent, cysteamine, was applied subcutaneously 4 hours before the experiment to examine the effects of endogenous somatostatin...
April 21, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28429469/high-body-mass-and-kidney-dysfunction-relate-to-worse-nerve-function-even-in-adults-without-neuropathy
#3
Rens Hanewinckel, M Arfan Ikram, Oscar H Franco, Albert Hofman, Judith Drenthen, Pieter A van Doorn
Polyneuropathy is a prevalent and disabling disorder. Despite extensive evaluation, the cause often remains unknown. Factors that predispose for the development of polyneuropathy need to be identified. We investigated the effect of anthropometric and metabolic factors on peripheral nerve function in 908 participants of the population-based Rotterdam Study without any symptoms or signs of polyneuropathy. Participants underwent nerve conduction studies of the sural and peroneal nerve. Data on age, height, weight, waist circumference, diabetes, lipid levels, hypertension and kidney function were collected...
April 20, 2017: Journal of the Peripheral Nervous System: JPNS
https://www.readbyqxmd.com/read/28428928/origin-branching-and-communications-of-the-intercostobrachial-nerve-a-meta-analysis-with-implications-for-mastectomy-and-axillary-lymph-node-dissection-in-breast-cancer
#4
REVIEW
Brandon Michael Henry, Matthew J Graves, Jakub R Pękala, Beatrice Sanna, Wan Chin Hsieh, R Shane Tubbs, Jerzy A Walocha, Krzysztof A Tomaszewski
The intercostobrachial nerve (ICBN), which usually originates from the lateral cutaneous branch of the second intercostal nerve, innervates areas of the axilla, lateral chest, and medial arm. It is at risk for injury during operative procedures that are often used in the management of breast cancer and such injury has been associated with postoperative sensory loss and neuropathic pain, decreasing the quality of life. PubMed, Excerpta Medica Database (EMBASE), ScienceDirect, Google Scholar, China National Knowledge Infrastructure (CNKI), Scientific Electronic Library Online (SciELO), Biosciences Information Service (BIOSIS), and Web of Science were searched comprehensively...
March 17, 2017: Curēus
https://www.readbyqxmd.com/read/28428919/tibial-bone-grafting-for-wrist-reconstruction
#5
Schneider K Rancy, Stephanie D Malliaris, Scott W Wolfe
Background Iliac crest bone graft harvesting is routinely performed for upper extremity orthopedic procedures despite high complication rates associated with sensory nerve injury, hematoma, chronic pain, and fracture. Description of Technique Cancellous bone graft is harvested from the proximal tibia using a medial approach, minimizing donor site morbidity. Patients and Methods A retrospective review was undertaken of 14 patients who underwent cancellous proximal tibia bone graft harvesting to augment healing of wrist reconstruction, with 2 months minimum follow-up...
May 2017: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/28428505/-neurolysis-and-spinal-analgesia-in-cancer-pain-management
#6
Seiji Hattori, Junko Tachibana
Cancer pain appears as a complex pain and often progressive.WhenWHO pain management strategy and/or palliative care failed to relieve their pain, patients are given high dose opioids or anonymous adjuvant drugs and have no chance to meet specialized pain treatment. This section briefly covers the outline of neurolysis and spinal analgesia for these cancer patients with severe pain. Purpose of nerve block and neurolysis are to block the incoming signal of pain in order to reduce pain, reduce analgesic dose, recover ADL, and finally to be discharged from the hospital...
April 2017: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/28427125/-the-clinical-value-of-sudoscan-in-diagnosis-of-diabetic-distal-symmetrical-peripheral-neuropathy
#7
J J Ma, S L Hao, X T Cheng, Y Yuan
Objective: To evaluate the clinical value of SUDOSCAN in diagnosis of diabetic distal symmetrical peripheral neuropathy. Methods: According to the diagnostic criteria for multiple diabetic distal symmetrical peripheral neuropathy, a total of 130 patients with type 2 diabetes mellitus (T2DM) in Department of Endocrinology, the Affiliated Hospital of Qingdao University between August 2015 and July 2016 were divided into two groups, diabetic peripheral neuropathy group (DPN group, 50 cases) and non-diabetic peripheral neuropathy group (NDPN group, 80 cases)...
April 18, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28424010/olfactory-development-part-1-function-from-fetal-perception-to-adult-wine-tasting
#8
Harvey B Sarnat, Laura Flores-Sarnat, Xing-Chang Wei
Discrimination of odorous molecules in amniotic fluid occur after 30 weeks' gestation; fetuses exhibit differential responses to maternal diet. Olfactory reflexes enable reliable neonatal testing. Olfactory bulbs can be demonstrated reliably by MRI after 30 weeks' gestation, and their hypoplasia or aplasia also documented by late prenatal and postnatal MRI. Olfactory axons project from nasal epithelium to telencephalon before olfactory bulbs form. Fetal olfactory maturation remains incomplete at term for neuronal differentiation, synaptogenesis, myelination, and persistence of the transitory fetal ventricular recess...
May 2017: Journal of Child Neurology
https://www.readbyqxmd.com/read/28420964/identification-of-the-spinal-expression-profile-of-non-coding-rnas-involved-in-neuropathic-pain-following-spared-nerve-injury-by-sequence-analysis
#9
Jun Zhou, Qingming Xiong, Hongtao Chen, Chengxiang Yang, Youling Fan
Neuropathic pain (NP) is caused by damage to the nervous system, resulting in aberrant pain, which is associated with gene expression changes in the sensory pathway. However, the molecular mechanisms are not fully understood. A non-coding Ribose Nucleic Acid (ncRNA) is an RNA molecule that is not translated into a protein. NcRNAs are involved in many cellular processes, and mutations or imbalances of the repertoire within the body can cause a variety of diseases. Although ncRNAs have recently been shown to play a role in NP pathogenesis, the specific effects of ncRNAs in NP remain largely unknown...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28420906/comparison-of-ultrasound-and-ultrasound-plus-nerve-stimulator-guidance-axillary-plexus-block
#10
Gokhan Demirelli, Semih Baskan, Isil Karabeyoglu, Ismail Aytac, Dilsen Hatice Ornek, Alper Erdogmus, Mustafa Baydar
OBJECTIVE: To evaluate the characteristics of axillary plexus blockade applied using ultrasound only and using ultrasound together with nerve stimulator in patients undergoing planned forearm, wrist or hand surgery. METHODS: This randomised, prospective, double-blinded, single-centre study was conducted at Ankara Numune Training and Research Hospital, Ankara, Turkey, from November 2014 to August 2015, and comprised patients undergoing forearm, wrist or hand surgery...
April 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28419098/robust-information-propagation-through-noisy-neural-circuits
#11
Joel Zylberberg, Alexandre Pouget, Peter E Latham, Eric Shea-Brown
Sensory neurons give highly variable responses to stimulation, which can limit the amount of stimulus information available to downstream circuits. Much work has investigated the factors that affect the amount of information encoded in these population responses, leading to insights about the role of covariability among neurons, tuning curve shape, etc. However, the informativeness of neural responses is not the only relevant feature of population codes; of potentially equal importance is how robustly that information propagates to downstream structures...
April 18, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28418820/case-241-hemiparkinsonism-hemiatrophy-spect-with-99m-tc-trodat-1-and-muscle-mr-imaging-abnormalities
#12
Thiago Cardoso Vale, Flávia Cristina de Lima Pinto, José Luiz Pedroso, Marília Alves Dos Reis, Ilza Rosa Batista, Rodrigo Affonseca Bressan, René Leandro Magalhães Rivero, Renato Adam Mendonça, Orlando G Barsottini
History A 43-year-old right-handed man presented with a history of progressive mild left-sided weakness and slowness of movements. Symptoms began 4 years earlier, and the patient noticed a progressive decline in his daily routine due to gait difficulties in the past year. There was no history of head trauma, surgery, drug therapy, smoking, or alcohol abuse, nor was there any relevant family history. Examination revealed normal cognition (29 of 30 points on the Mini-Mental State Examination and 27 of 30 points on the Montreal Cognitive Assessment) and normal cerebellar, sensory, cranial nerve, and autonomic function...
May 2017: Radiology
https://www.readbyqxmd.com/read/28417038/anomalous-innervation-of-the-median-nerve-in-the-arm-in-the-absence-of-the-musculocutaneous-nerve
#13
Khursheed Raza, Seema Singh, Neerja Rani, Raghav Mishra, Kamakshi Mehta, Saroj Kaler
The brachial plexus innervates the upper extremities. While variations in the formation of the brachial plexus and its terminal branches are quite common, it is uncommon for the median nerve to innervate the muscles of the arm. During the dissection of an elderly male cadaver at the Department of Anatomy, All India Institute of Medical Sciences, New Delhi, India, in 2016, the coracobrachialis muscle was found to be supplied by a direct branch from the lateral root of the median nerve and the musculocutaneous nerve was absent...
February 2017: Sultan Qaboos University Medical Journal
https://www.readbyqxmd.com/read/28416686/ngf-trka-signaling-in-sensory-nerves-is-required-for-skeletal-adaptation-to-mechanical-loads-in-mice
#14
Ryan E Tomlinson, Zhi Li, Zhu Li, Liliana Minichiello, Ryan C Riddle, Arun Venkatesan, Thomas L Clemens
Sensory nerves emanating from the dorsal root extensively innervate the surfaces of mammalian bone, a privileged location for the regulation of biomechanical signaling. Here, we show that NGF-TrkA signaling in skeletal sensory nerves is an early response to mechanical loading of bone and is required to achieve maximal load-induced bone formation. First, the elimination of TrkA signaling in mice harboring mutant TrkA(F592A) alleles was found to greatly attenuate load-induced bone formation induced by axial forelimb compression...
April 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28414619/how-the-nerves-reached-the-muscle-bernard-katz-stephen-w-kuffler-and-john-c-eccles-certain-implications-of-exile-for-the-development-of-twentieth-century-neurophysiology
#15
Frank W Stahnisch
This article explores the work by Bernard Katz (1911-2003), Stephen W. Kuffler (1913-1980), and John C. Eccles (1903-1997) on the nerve-muscle junction as a milestone in twentieth-century neurophysiology with wider scientific implications. The historical question is approached from two perspectives: (a) an investigation of twentieth-century solutions to a longer physiological dispute and (b) an examination of a new kind of laboratory and academic cooperation. From this vantage point, the work pursued in Sydney by Sir John Carew Eccles' team on the neuromuscular junction is particularly valuable, since it contributed a central functional element to modern physiological understanding regarding the function and structure of the human and animal nervous system...
April 17, 2017: Journal of the History of the Neurosciences
https://www.readbyqxmd.com/read/28413736/targeted-intraspinal-radiofrequency-ablation-for-lumbar-spinal-stenosis
#16
Robert E Jacobson, Michelle Granville, Jesse Hatgis DO
INTRODUCTION: By using a combination of magnetic resonance imaging (MRI) and computed tomography (CT) of the lumbar spine, it is possible to distinguish between spinal stenosis caused by bone compression and specific soft tissue epidural intraspinal lesions that cause localized spinal canal stenosis and neural compression. Examples include facet cysts and yellow ligament hypertrophy. Many of these patients are elderly with medical comorbidities that make open surgery problematic. MATERIALS & METHODS: This is a study of patients with predominantly soft tissue stenosis being treated with targeted intraspinal radiofrequency (RF) heat ablation...
March 10, 2017: Curēus
https://www.readbyqxmd.com/read/28413277/efficacy-of-dexmedetomidine-with-ropivacaine-in-supraclavicular-brachial-plexus-block-for-upper-limb-surgeries
#17
Jithendra Chinnappa, Shivakumar Shivanna, Vinayak Seenappa Pujari, Tejesh Channasandra Anandaswamy
BACKGROUND AND AIMS: The primary aim of this study was to evaluate the effect of addition of dexmedetomidine on the duration of analgesia in patients undergoing upper limb surgeries under supraclavicular brachial plexus block. MATERIAL AND METHODS: Sixty patients of American Society of Anesthesiologists physical status I/II/III undergoing elective upper limb surgeries under supraclavicular brachial plexus block using nerve stimulator were randomized into two groups...
January 2017: Journal of Anaesthesiology, Clinical Pharmacology
https://www.readbyqxmd.com/read/28412531/vagus-nerve-is-involved-in-the-changes-in-body-temperature-induced-by-intragastric-administration-of-1-8-cineole-via-trpm8-in-mice
#18
Tomomi Urata, Noriyuki Mori, Tsutomu Fukuwatari
Transient Receptor Potential Melastatin 8 (TRPM8) is a cold receptor activated by mild cold temperature (<28°C). TRPM8 expressed in cutaneous sensory nerves is involved in cold sensation and thermoregulation. TRPM8 mRNA is detected in various tissues, including the gastrointestinal mucosa, and in the vagal afferent nerve. The relationship between vagal afferent nerve-specific expression of TRPM8 and thermoregulation remains unclear. In this study, we aimed to investigate whether TRPM8 expression in the vagal afferent nerve is involved in autonomic thermoregulation...
April 12, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28412189/mean-5-year-follow-up-for-suture-button-suspensionplasty-in-the-treatment-of-thumb-carpometacarpal-joint-osteoarthritis
#19
Jeffrey Yao, Andre Eu-Jin Cheah
PURPOSE: Suture button suspensionplasty (SBS) has been used to treat thumb carpometacarpal joint osteoarthritis (CMC joint OA). Although promising short-term outcomes have been reported, no outcomes beyond 4 years have been published. The aim of this article is to report intermediate outcomes of SBS. METHODS: We reviewed the charts of 14 patients who underwent 16 SBS procedures for symptomatic thumb CMC joint OA. We recorded demographic data, preoperative Eaton stage, length of follow-up, Quick-Disabilities of the Arm, Shoulder, and Hand questionnaire scores, as well as pinch strength, grip strength, range of motion, and metacarpal subsidence...
April 12, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28409073/facial-paralysis-and-hearing-loss-a-rare-manifestation-of-prostate-cancer-metastases
#20
Uroosa Ibrahim, Amina Saqib, Farhan Mohammad, Muhammad R Raza, Nikhil Nalluri, Frank Forte
Dural prostate metastases (DPM) are a rare manifestation of metastatic prostate cancer seen in approximately one to six percent of cases. Presenting symptoms may include signs of elevated intracranial pressure, headache, altered mental status, or cranial nerve palsies. Hearing loss, sensory changes, dysarthria, and dysphagia are rare symptoms in DPM that were present in our patient. We present a case of a 58-year-old male with a known diagnosis of adenocarcinoma of the prostate presenting with symptoms of acute exacerbation of chronic obstructive pulmonary disease (COPD), sub-acute right-sided hearing loss, and right-sided facial paralysis...
March 3, 2017: Curēus
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