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Ulnar nerve

Kiminori Yukata, Masaaki Murase, Takahiro Hashimoto, Yasunori Shimaoka, Toshihiko Taguchi, Junichi Hamawaki
We describe an unusual case of ulnar nerve compression (cubital tunnel syndrome) caused by synovial protrusion in primary synovial chondromatosis of the elbow in a 59-year-old man. Magnetic resonance imaging is a useful tool for diagnosing this rare condition. Surgical excision of the intra-articular multiple loose bodies and ulnar nerve decompression were performed. The clinician should be aware of primary synovial chondromatosis as one of the causative factors of cubital tunnel syndrome.
April 2018: Shoulder & Elbow
Izabela Gosk-Bierska, Maria Misterska-Skóra, Marta Wasilewska, Małgorzata Bilińska, Jerzy Gosk, Rajmund Adamiec, Magdalena Koszewicz
BACKGROUND: The pathogenesis of secondary Raynaud's phenomenon (SRP) associated with connective tissue diseases (CTD) is not entirely understood. Nervous system dysfunction and microangiopathy are considered to be causes of this pathology. OBJECTIVES: Peripheral and autonomic nervous system function, the stage of microangiopathy, and the relationships between these in patients with SRP were analyzed. MATERIAL AND METHODS: In the study, 20 patients with CTD-related SRP and 30 healthy controls were subject to capillaroscopy, standard conduction velocity tests and conduction velocity distribution (CVD) tests in ulnar and peroneal nerves, heart rate variability (HRV), and sympathetic skin response (SSR) tests...
March 20, 2018: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
Felix A Thomas, Volker Dietz, Thiemo Scharfenberger, Miriam Schrafl-Altermatt
The aim of this study was to evaluate the influence of unilateral reduction of afferent input on the 'neural coupling' mechanism during cooperative hand movements. This 'neural coupling' is reflected in the task-specific appearance of contralateral reflex responses in forearm muscles to unilateral arm nerve stimulation. Sensory input from the right hand was reduced by ischemic nerve block at the right wrist. Ipsilateral and contralateral reflex responses elicited by stimulation of the ulnar nerve either at the left or the right wrist proximal to the nerve block were recorded in forearm extensors during the performance of cooperative hand movements...
March 19, 2018: Neuroreport
Jacey L Janz Vernoski, Jack R Bjorkland, Talia J Kramer, Steven T Oczak, Alexandra L Borstad
Proprioception may be the least well measured of all contributors to the neural control of movement. New precise, reliable measures of proprioception are needed for clinical diagnosis of impairment, and to measure outcomes of proprioceptive training. The purpose of this simple, non-invasive method is to temporarily knockdown upper limb proprioception in healthy adults, to an extent that would be useful in the development and testing of upper limb proprioception measures. Knockdown models have two main advantages over studying humans with impaired proprioception: participant availability and the ability to control the extent of impairment across participants...
March 3, 2018: Journal of Visualized Experiments: JoVE
Kalliopi Pitarokoili, Moritz Kronlage, Philip Bäumer, Daniel Schwarz, Ralf Gold, Martin Bendszus, Min-Suk Yoon
Background: We present a clinical, electrophysiological, sonographical and magnetic resonance neurography (MRN) study examining the complementary role of two neuroimaging methods of the peripheral nervous system for patients with chronic inflammatory demyelinating polyneuropathy (CIDP). Furthermore, we explore the significance of cross-sectional area (CSA) increase through correlations with MRN markers of nerve integrity. Methods: A total of 108 nerve segments on the median, ulnar, radial, tibial and fibular nerve, as well as the lumbar and cervical plexus of 18 CIDP patients were examined with high-resonance nerve ultrasound (HRUS) and MRN additionally to the nerve conduction studies...
2018: Therapeutic Advances in Neurological Disorders
Massimiliano Valeriani, Costanza Pazzaglia, Vincenzo Rizzo, Angelo Quartarone, Catello Vollono
OBJECTIVE: To investigate the mechanism subtending the analgesic effect of high frequency non-painful somatosensory stimulation. METHODS: Laser evoked potentials (LEPs) and laser-pain rating were obtained from healthy subjects to stimulation of different parts of the body. LEPs were recorded at baseline and during non-painful electrical stimulation of the superficial branch of the right radial nerve (RRES). RESULTS: RRES reduced N2/P2 LEP amplitude to right radial (F(8,10)  = 82...
February 24, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
Olga Gutkowska, Jacek Martynkiewicz, Marek Stępniewski, Jerzy Gosk
Brachial plexus injuries (BPIs) caused by shoulder dislocation usually have a transient character and tend to resolve spontaneously. However, in some patients the symptoms can persist and require operative intervention. This work aims to determine the risk factors for persistent BPIs resulting from shoulder dislocation. The study comprised 73 patients (58 men, 15 women; mean age: 50 years) treated operatively between the years 2000 and 2016 for persistent BPIs resulting from shoulder dislocation. Patient age, gender, type of initial trauma, number of affected nerves, presence of accompanying injuries, and time interval from dislocation to its reduction were analysed...
2018: BioMed Research International
Julia P Slopsema, John M Boss, Lane A Heyboer, Carson M Tobias, Brooke P Draggoo, Kathleen E Finn, Payton J Hoff, Katharine H Polasek
Background: Electrical stimulation is increasingly relevant in a variety of medical treatments. In this study, surface electrical stimulation was evaluated as a method to non-invasively target a neural function, specifically natural sensation in the distal limbs. Method: Electrodes were placed over the median and ulnar nerves at the elbow and the common peroneal and lateral sural cutaneous nerves at the knee. Strength-duration curves for sensation were compared between nerves...
2018: Open Biomedical Engineering Journal
Sang Ki Lee, Gyu Sang Lee, Won Sik Choy
PURPOSE: This study aimed to retrospectively analyze the clinical results of anterior submuscular transposition of the ulnar nerve using a flexor-pronator V-Y lengthening technique in patients with severe cubital tunnel syndrome (CTS). MATERIALS AND METHODS: From January 2007 to May 2015, 36 patients with grade III CTS based on McGowan's classification were enrolled. All patients were treated with anterior submuscular transposition of the ulnar nerve using a flexor-pronator V-Y lengthening technique...
March 13, 2018: Annals of Plastic Surgery
Woo Young Park, Jae Chan Choi, Hey Jeong Yun, Yeong Gwan Jeon, Gisoon Park, Jong Bum Choi
BACKGROUND: Combined rocuronium and cisatracurium have synergistic effects. We investigated whether reduced doses are effective during coadministration, by monitoring neuromuscular relaxation during surgery. METHODS: This randomized, controlled clinical trial was registered at (registration number NCT02495038). The participants were 81 patients scheduled for elective mastoidectomy and tympanoplasty. Participants were assigned to groups, including the intubating dose group (Group I, n = 27; combined ED95 rocuronium and ED95 cisatracurium), the small reduction group (Group S, n = 27; dose reduced by 10% of each ED95), or the large reduction group (Group L, n = 27; dose reduced by 20% of each ED95)...
March 2018: Medicine (Baltimore)
Shmuel Springer, Zvi Kozol, Zvi Reznic
The aim of this study was to test the effects of kilohertz frequency alternating current (KHFAC) surface stimulation applied to the ulnar nerve on force and myoelectrical activity of the abductor digiti minimi (ADM) muscle. Eighteen healthy volunteers (age: 27.6 ± 7.9 years; 10 males, 8 females) were included in the study. Each subject participated in one session during which a biphasic 7 kHz rectangular pulse was delivered above the medial epicondyle of the humerus to induce ulnar nerve blocking. ADM electromyographic (EMG) activity and contraction force were measured before (Pre), immediately after, and following 5 and 10 min post stimulation (post 1, post 2)...
March 8, 2018: Artificial Organs
Will B J Rudge, Kelechi Eseonu, Matthew Brown, Simon Warren, Addie Majed, Ian L Bayley, Simon M Lambert, Deborah Higgs, Mark Falworth
BACKGROUND: Deep prosthetic infection is a potentially devastating complication after total elbow arthroplasty, with an incidence of up to 12%. This study examined the demographics, microbiologic profile, and outcomes of infected total elbow arthroplasty treated with 2-stage revision in a tertiary referral unit. METHODS: We identified 19 consecutive patients (mean age, 65 years) undergoing revision arthroplasty for deep prosthetic infection. All patients underwent a first-stage procedure with removal of implants, débridement, and insertion of an antibiotic-loaded cement spacer, followed by at least 6 weeks of intravenous antibiotics...
March 1, 2018: Journal of Shoulder and Elbow Surgery
John D Jennings, John F Jennings
BACKGROUND: Although ulnar neuropathies are commonly encountered, isolated involvement of the motor branch is exceedingly rare. Previous reports of this entity describe compression as the deep motor branch passes through the piso-hamate hiatus and the adductor pollicis hiatus. This case series described 3 cases of motor branch compression due to unique etiologies which resolved after surgery. METHODS: A retrospective chart review identified patients with compression of the ulnar nerve motor branch...
February 27, 2018: Annals of Plastic Surgery
D M Sakai, M Romano, C T Tseng, A Flanders, M Martin-Flores
This study compared measurements of neuromuscular function with mechanomyography (MMG) and acceleromyography (AMG) in nine anesthetized dogs receiving 0.1mg/kg vecuronium intravenously. Train-of-four (TOF) stimulation was applied to each ulnar nerve every 15s. The resulting amplitude of the first twitch (T1) and the TOF ratio were measured with both monitors. The baseline TOF ratio (prior to vecuronium), onset time (time of injection to T1<5%), recovery index (time between T1 values of 25% and 75%) and duration of neuromuscular block (injection to TOF 0...
March 2018: Veterinary Journal
Sedat Develi
AIM: The aim of this study was to evaluate the existence of nerve innervation of the triceps brachii muscle via ulnar nerve and its clinical importance in terms of nerve transfer or susceptibility to iatrogenic injuries during surgical procedures. MATERIAL AND METHODS: 35 skeletally mature upper extremities of adult cadavers were included in the present study. Ulnar nerve was revealed from medial cord to the distal of cubital fossa. Existence of the branches of the ulnar nerve and communicant branch of the radial nerve was examined in the brachium...
February 7, 2018: Turkish Neurosurgery
Tuğba Atan, Zafer Günendi
Background/aim: The aim of this study was to assess the diagnostic utility of the ultrasonographic ratio of median nerve cross-sectional area (m-CSA) to ulnar nerve cross-sectional area (u-CSA), the m-CSA/u-CSA ratio, in carpal tunnel syndrome (CTS). Materials and methods: Fifty patients with positive symptoms and electromyography results of CTS and 50 healthy matched control subjects were evaluated. Ultrasonographic m-CSA and u-CSA measurements of each participant were made at the level of the pisiform bone and the m-CSA/u-CSA ratio was calculated...
February 23, 2018: Turkish Journal of Medical Sciences
Charmaine Baxter, Thomas A Miller, Douglas C Ross, Christopher Doherty
Cervical spondylotic amyotrophy is characterized by severe, proximal upper extremity weakness including an inability to abduct the shoulder and flex the elbow. Treatment using both medical and surgical decompression approaches has produced variable results. This paper reports the use of nerve transfers (spinal accessory to suprascapular, flexor carpi ulnaris fascicle of ulnar to biceps motor branch, radial nerve branch to triceps to axillary) to restore shoulder and elbow function in a case of unilateral cervical spondylotic amyotrophy involving C5 and C6 myotomes...
February 16, 2018: Journal of Hand Surgery
Mohammadhadi Nouraei, Mehdi Motififar, Morteza Barazandeh
Background: In this study, functional state of patients with Type C distal humerus fractures undergone surgical plating was evaluated 6 and 12 months after the surgery in order to record postsurgical factors such as pain level and job/performance satisfaction. Materials and Methods: In this cross-sectional study, 46 patients with humerus fractures were recruited and their ability to do daily tasks, presence of degenerative changes, stability of elbow joint, and range of motion was evaluated...
2018: Advanced Biomedical Research
Cun-Jin Wang, Ya-Li Ge, Ju Gao, Feng-Yun Long, Zhi-Hua Mi, Tian-Feng Huang, Xiang-Zhi Fang, Xiao-Ping Chen, Yu-Si Hua, Yang Zhang
Ultrasound-guided interscalene brachial plexus blockade (IBPB) has a relatively high success rate in shoulder surgery; however, whether multiple injections are superior to a single injection (SI) is currently unknown. In the present study, ultrasound-guided SI and triple-injection (TI) IBPBs were compared in a prospective randomized trial. A total of 111 patients undergoing arthroscopic shoulder surgery and presenting with an American Society of Anesthesiologists physical status grading of I-II were randomly allocated to receive IBPB with 15 ml of 1% ropivacaine as a SI or TI...
March 2018: Experimental and Therapeutic Medicine
Suchitra Sachin Palve, Sachin Bhaskar Palve
Background: Nerve conduction studies are performed to diagnose the disorders of the peripheral nervous system. The reference values for nerve conduction velocity (NCV) and late responses for different nerves considerably vary in different group and type of population. Physiological factors such as age, temperature, height, and gender affect the NCV. However, there are very few studies which show the age group at which these changes become significant. Aim and Objectives: The aim of the study was to establish the electrophysiological data of the specific age group at which changes in NCV as well as late responses of median common peroneal nerve and also see the late response in the form of F-waves and H-reflex...
January 2018: Journal of Neurosciences in Rural Practice
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