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https://www.readbyqxmd.com/read/29054880/common-synaptic-input-to-motor-neurons-and-neural-drive-to-targeted-reinnervated-muscles
#1
D Farina, A M Castronovo, I Vujaklija, A Sturma, S Salminger, C Hofer, O C Aszmann
We compared the behaviour of motor neurons innervating their physiological muscle targets with motor neurons from the same spinal segment whose axons were surgically redirected to remnant muscles (targeted muscle reinnervation). The objective was to assess whether motor neurons with non-physiological innervation receive similar synaptic input and could be voluntary controlled as motor neurons with natural innervation. For this purpose, we acquired high-density EMG signals from the biceps brachii in 5 male trans-humeral amputees who underwent targeted reinnervation of this muscle by the ulnar nerve and from the first dorsal interosseous muscle of 5 healthy individuals to investigate the natural innervation of the ulnar nerve...
October 20, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29054684/humeral-shaft-fractures-union-outcomes-in-a-large-cohort
#2
Frances E Harkin, Richard J Large
BACKGROUND: Humeral shaft fractures can be managed conservatively or operatively. Fracture characteristics were analyzed to identify patients who would benefit from early operative fixation. METHODS: We performed a retrospective cohort study of 126 consecutive humeral shaft fractures (2008-2015). Fractures were classified according to fracture type, location, separation, and comminution. RESULTS: Of 126 patients, 96 were managed conservatively...
November 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29054030/measurement-of-strain-and-tensile-force-of-the-supraspinatus-tendon-under-conditions-that-simulates-low-angle-isometric-elevation-of-the-gleno-humeral-joint-influence-of-adduction-torque-and-joint-positioning
#3
Hiroki Miyamoto, Mitsuhiro Aoki, Egi Hidaka, Mineko Fujimiya, Eiichi Uchiyama
BACKGROUND: Recently, supraspinatus muscle exercise has been reported to treat rotator cuff disease and to recover shoulder function. However, there have been no report on the direct measurement of strain on the supraspinatus tendon during simulated isometric gleno-humeral joint elevation. METHODS: Ten fresh-frozen shoulder specimens with the rotator cuff complex left intact were used as experimental models. Isometric gleno-humeral joint elevation in a sitting position was reproduced with low angle of step-by-step elevation in the scapular plane and strain was measured on the surface layer of the supraspinatus tendon...
October 13, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/29053545/three-dimensional-deformities-of-nonoperative-midshaft-clavicle-fractures-a-surface-matching-analysis
#4
Satoshi Oki, Noboru Matsumura, Yoshimori Kiriyama, Takuji Iwamoto, Kazuki Sato, Takeo Nagura
OBJECTIVE: The purpose of this study was to describe the 3-dimensional deformities of midshaft clavicle fractures, which had been treated nonoperatively, using computed tomography (CT) surface matching. METHODS: Twenty-one patients with unilateral midshaft clavicle fracture, who had been treated nonoperatively, were enrolled and evaluated retrospectively. The 3-dimensional deformity of the fractured clavicle was evaluated by CT surface matching. CT scans of 21 age- and sex-matched patients with initial traumatic shoulder dislocation or proximal humeral fracture were enrolled as a control group, and the differences in 3-dimensional deformities and lengths of the clavicles between the fracture group and the control group were evaluated...
November 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/29053499/the-community-orthopaedic-surgeon-taking-trauma-call-pediatric-supracondylar-humeral-fracture-pearls-and-pitfalls
#5
Steven L Frick, Charles T Mehlman
Supracondylar humeral fractures are the most common type of pediatric elbow fracture. With proper treatment, these injuries usually heal well and the patients return to full function. However, a small percentage of these injuries may result in devastating complications and, thus, provoke anxiety in many surgeons treating them. This article provides tips for successful management of these injuries without complications and provides references for further study.
November 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/29052827/primary-exploration-for-radial-nerve-palsy-associated-with-unstable-closed-humeral-shaft-fracture
#6
Soo Hong Han, In Tae Hong, Ho Jae Lee, Sang June Lee, Uk Kim, Dong Won Kim
BACKGROUND: The treatment of radial nerve palsy caused by closed humeral shaft fracture is a matter of debate. The purpose of this study is to evaluate the outcome of early surgical management of radial nerve palsy in patients with unstable closed humeral shaft fractures and to determine whether patients with this injury should be surgically explored. METHODS: Medical records of 15 consecutive patients who had undergone open reduction and internal fixation for unstable closed humeral shaft fractures were reviewed...
September 2017: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
https://www.readbyqxmd.com/read/29052035/why-a-surgically-treated-humeral-shaft-fracture-became-a-nonunion-review-of-11%C3%A2-years-in-two-trauma-centers
#7
A Maresca, P Sangiovanni, S Cerbasi, R Politano, R Fantasia, M Commessatti, R Pascarella
AIM: The aim of this study was to evaluate nonunion causes of surgically treated humeral shaft fractures in two different trauma centers. METHODS: A total of 327 cases of humeral shaft fractures were treated in 11 years in two trauma centers. We retrospectively reviewed in detail some factors in order to understand the reasons for nonunion: (1) fracture type, according to the AO classification, (2) grade of open fracture, according to Gustilo-Anderson, (3) timing, (4) reduction and (5) fixation...
October 19, 2017: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/29052011/the-smartphone-inclinometer-a-new-tool-to-determine-elbow-range-of-motion
#8
Frédéric Vauclair, Abdulaziz Aljurayyan, Fahad H Abduljabbar, Bardia Barimani, Patrick Goetti, Fiona Houghton, Edward J Harvey, Dominique M Rouleau
BACKGROUND: There are easily accessible tools on smartphones (APP) for measuring elbow range of motion (ROM). The purpose of this study is to evaluate the validity of a particular APP in determining elbow ROM in comparison with the commonly used goniometer (GON), surgeon estimation of range (EST) and measurement on X-ray (XR). METHODS: The study included 20 patients (40 elbows). Flexion, extension, pronation and supination were measured using three different methods: EST, GON and APP...
October 19, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/29051871/bilateral-divergent-shoulder-s-fracture-dislocation-case-in-an-ischemic-stroke-patient
#9
Atchi Walla, Faré Gnandi-Piou, Pilakimwé Egbohou, Komi Assogba, Mawuko Quacoe
INTRODUCTION: The literature review revealed that nowadays only about 15 cases of bilateral shoulder dislocation associated with the fracture of the upper end of the humerus have been published. The triad of lesional mechanism designated by the triple syndrome E composed of epilepsy, electrocution, and external trauma was the circumstances noted in which these fractures dislocations occur with migration of the two humeral heads either forward or backward. CASE REPORT: An architect of 36-year-old, right-handed, was admitted in emergency department for loss of knowledge of progressive installation...
May 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/29050856/the-relationship-between-age-rotator-cuff-integrity-and-osseous-microarchitecture-of-greater-tuberosity-where-should-we-put-anchor
#10
Erica Kholinne, Hyun Joo Lee, Sung Jung Kim, So Hyun Park, In-Ho Jeon
OBJECTIVE: The aim of this study was to compare the microarchitecture of the greater tuberosity with or without rotator cuff tear and to obtain optimum location for anchor screw insertion for rotator cuff repair. METHODS: Twenty-five humeral heads were harvested from 13 male cadavers of mean age 58.4 years, including 6 humeri with rotator cuff tear and 19 intact humeri. Six regions of interest (proximal, intermediate, and distal zones of the superficial and deep regions) were divided into the anterior (G1), middle (G2), and posterior (G3) areas of the greater tuberosity...
October 16, 2017: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/29046255/platform-shoulder-arthroplasty-a-systematic-review
#11
Jacob M Kirsch, Moin Khan, Patrick Thornley, Mark Gichuru, Michael T Freehill, Andrew Neviaser, James Moravek, Bruce S Miller, Asheesh Bedi
BACKGROUND: Platform shoulder arthroplasty systems may allow conversion to a reverse total shoulder arthroplasty (RTSA) without removing a well-fixed, well-positioned humeral stem. We sought to evaluate the complications associated with humeral stem exchange versus retention in patients undergoing conversion shoulder arthroplasty with a platform shoulder arthroplasty system. METHODS: PubMed, MEDLINE, CINAHL (Cumulative Index to Nursing and Allied Health Literature), and Embase were searched from database inception through October 9, 2016, for all articles comparing humeral stem retention versus exchange during conversion RTSA or that pertained to conversion RTSA with stem retention alone...
October 15, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29045969/-clinical-study-on-locking-plate-for-the-treatment-of-non-osteoporotic-complex-proximal-humeral-fractures
#12
X Li, F L Li, Y Lu, Y M Zhu, S Y Guo, Y J Li, C Y Jiang
OBJECTIVE: To describe long-term results of locking plate used for the treatment of non-osteoporotic fresh three- and four-part proximal humeral fractures with at least 2 years follow-up. METHODS: The functional outcomes and the complications of non-osteoporotic three- and four-part fresh proximal humeral fractures treated with locking plate were assessed retrospectively. The active range of motion, the Constant score, the University of California at Los Angeles (UCLA) shoulder score, the visual analogue score (VAS) were employed to evaluate the postoperative shoulder function, and the radiographic images were taken to evaluate the neck-shaft angle of the proximal humeral and postoperative implant-related complications...
October 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/29045968/-comparative-results-of-non-operative-and-operative-treatment-of-humeral-shaft-fractures
#13
B S Zhang, W Y Li, X H Liu, J Wei, L He, M Y Wang
OBJECTIVE: To compare the difference between non-operative and operative treatment of humeral shaft fractures. METHODS: From March 2005 to October 2012, 252 cases of humeral shaft fractures were treated and were adequately followed up. According to the treatment methods, the patients were divided into 2 groups: the non-operative group and the operative group. In the non-operative group, there were 76 cases treated with plaster/small splint fixation,meanwhile there were 176 cases treated with internal fixation either by plating or by nailing in the operative group...
October 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/29044033/-reduction-of-shoulder-dislocation-with-the-cunningham-method
#14
Thorsteinn H Gudmundsson, Hjalti Mar Bjornsson
INTRODUCTION: The Cunningham technique has been shown to be an effective and simple method to reduce a dislocated shoulder. It is based on the theory that the humeral head remains outside the glenoid fossa due to tension in the long biceps tendon. In the beginning of 2013 doctors at the emergency department in Landspitali University Hospital (LUH) in Reykjavik were instructed in the Cunningham method for reduction of anterior dislocation without sedation. The goal of this retrospective study was to evaluate the impact of its induction with regards to number of attempts, successful relocations, sedation, use of analgesics and length of stay in the ED...
September 2017: Læknablađiđ
https://www.readbyqxmd.com/read/29043096/sex-determination-using-humeral-dimensions-in-a-sample-from-kwazulu-natal-an-osteometric-study
#15
Oluwatosin Olalekan Ogedengbe, Sunday Adelaja Ajayi, Omobola Aderibigbe Komolafe, Aung Khaing Zaw, Edwin Coleridge Stephen Naidu, Onyemaechi Okpara Azu
The morphological characteristics of the humeral bone has been investigated in recent times with studies showing varying degrees of sexual dimorphism. Osteologists and forensic scientists have shown that sex determination methods based on skeletal measurements are population specific, and these population-specific variations are present in many body dimensions. The present study aims to establish sex identification using osteometric standards for the humerus in a contemporary KwaZulu-Natal population. A total of 11 parameters were measured in a sample of n=211 humeri (males, 113; females, 98) from the osteological collection in the Discipline of Clinical Anatomy, Nelson R...
September 2017: Anatomy & Cell Biology
https://www.readbyqxmd.com/read/29037536/open-reduction-and-internal-fixation-for-nonunion-of-extra-articular-distal-humeral-fractures-in-patients-70-years-and-older
#16
Soo Min Cha, Hyun Dae Shin
HYPOTHESIS: The study purpose was to report the clinical and radiologic outcomes of osteosynthesis by open reduction and internal fixation for nonunion of extra-articular distal humeral fractures in patients aged 70 years or older. MATERIALS AND METHODS: This retrospective study included 28 patients who received osteosynthesis treatment between March 2010 and December 2015. Primary conservative treatment had failed in all patients. All surgical procedures were performed via the posterior approach without olecranon osteotomy and with the use of double-locking plates for each column...
October 13, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29037091/an-anthropometric-survey-of-u-s-preterm-and-full-term-neonates
#17
Susan M Abdel-Rahman, Ian M Paul, Paula Delmore, Laura James, Laura Fearn, Andrew M Atz, Brenda B Poindexter, Amira Al-Uzri, Andrew Lewandowski, Barrie L Harper, P Brian Smith
BACKGROUND: Anthropometric data prove valuable for screening and monitoring various medical conditions. In young infants, however, only weight, length and head circumference are represented in publically accessible databases. AIM: To characterise length and circumferential measures in preterm and full-term infants up to 90 days postnatal age. SUBJECTS AND METHODS: In eight U.S. medical centres, trained raters recorded humeral, ulnar, femoral, tibial, and fibular lengths along with mid-upper arm, mid-thigh, chest, abdominal, and neck circumference...
October 16, 2017: Annals of Human Biology
https://www.readbyqxmd.com/read/29036861/task-intensity-influences-upper-limb-and-torso-kinematics-during-two-common-overhead-functional-capacity-evaluation-tasks
#18
Angelica E Lang, Clark R Dickerson
BACKGROUND: The Functional Capacity Evaluation (FCE) is a tool used in the return-to-work process to guide treatment and decision making. Individual abilities and maximum capacity can be determined through visual observations of changes in mechanics as intensity increases. OBJECTIVE: The purpose of this study was to determine kinematic differences between sexes and intensity levels of two common FCE tasks to establish normative behaviours. METHODS: Upper limb and torso kinematics were collected from 30 participants as they performed the overhead lift and overhead work FCE tasks...
October 8, 2017: Work: a Journal of Prevention, Assessment, and Rehabilitation
https://www.readbyqxmd.com/read/29036614/identification-of-a-candidate-mutation-in-the-col1a2-gene-of-a-chow-chow-with-osteogenesis-imperfecta
#19
E M Quist, R Doan, R R Pool, B F Porter, D L Bannasch, S V Dindot
Osteogenesis imperfecta (OI) is a genetic disease that occurs in humans and animals. Individuals with OI exhibit signs of extreme bone fragility and osteopenia with frequent fractures and perinatal lethality in severe cases. In this study, we report the clinical diagnosis of OI in a dog and the use targeted next-generation sequencing to identify a candidate autosomal dominant mutation in the COL1A2 gene. A five-month old male Chow Chow was examined with a fractured left humerus and resolving, bilateral femoral fractures...
September 19, 2017: Journal of Heredity
https://www.readbyqxmd.com/read/29032988/clinical-and-radiographic-outcomes-after-total-shoulder-arthroplasty-with-an-anatomic-press-fit-short-stem
#20
Benjamin W Szerlip, Brent J Morris, Mitzi S Laughlin, Christopher M Kilian, T Bradley Edwards
BACKGROUND: There is limited information assessing outcomes after total shoulder arthroplasty (TSA) with a press-fit short stem. The purpose of this study was to evaluate early clinical and radiographic outcomes and complications after TSA with an anatomic press-fit short stem. METHODS: We identified 118 TSAs completed with press-fit short stem and minimum 2-year follow-up; 85 of these patients had a grit-blasted (GB) short stem placed, whereas 33 patients had short stems with proximal porous coating (PPC)...
October 9, 2017: Journal of Shoulder and Elbow Surgery
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