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https://www.readbyqxmd.com/read/29333724/voluntary-activation-and-twitch-potentiation-of-the-elbow-flexors-across-supinated-neutral-and-pronated-forearm-orientations
#1
Sienna Kohn, Rowan R Smart, Jennifer M Jakobi
Elbow flexion force depends on forearm orientation with supinated and neutral being stronger than pronated. The purpose of this study was to assess the influence of forearm orientation on voluntary activation (VA), postactivation potentiation (PAP), and twitch properties. Eleven males (23 ± 3 years) performed isometric elbow flexion maximal voluntary contractions (MVC) in supinated, neutral, and pronated forearm orientations with supramaximal stimulation to the biceps brachii muscle belly before, during, and after the MVC...
January 2018: Physiological Reports
https://www.readbyqxmd.com/read/29327541/-mini-locking-plates-for-the-treatment-of-regan-morrey-type-iii-fracture-of-ulnar-coronoid-process-through-anterior-approach-of-elbow-joint
#2
Xiao Lian, Yun-Ji Zeng
OBJECTIVE: To explore clinical effects of mini-locking plates for the treatment of Regan-Morrey type III fractures of ulnar coronoid process through an anterior approach of elbow joint. METHODS: A retrospective analysis on 12 patients with Regan-Morrey type III fractures of the ulnar coronoid process was performed from January 2011 to June 2014, who were treated with unini-locking plates through the anterior approach of elbow joint. There were 7 males and 5 females, ranging in age from 23 to 65 years old, averaged 43 years old...
January 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29327223/one-bone-forearm-osteodesis-and-biceps-re-routing-to-correct-severe-supination-contracture-in%C3%A2-a-paediatric-patient-with-late-obstetric-brachial-plexus-palsy
#3
Ricardo Monreal
PURPOSE: The one-bone forearm arthrodesis has been performed to change the position of the forearm in children with fixed supination deformity due to upper extremity neurologic deficit. In this article, we present a retrospective review of children with late obstetric brachial plexus palsy who underwent palliative surgery to correct severe supination contracture by one-bone forearm osteodesis and biceps re-routing. This technique has not been described previously. MATERIALS AND METHODS: In this retrospective study, four consecutive patients with upper extremity weakness and severe supination contracture who underwent forearm osteodesis in neutral or slight pronation and biceps re-routing...
January 12, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29324829/electrode-placement-on-the-forearm-for-selective-stimulation-of-finger-extension-flexion
#4
Xueliang Bao, Yuxuan Zhou, Yunlong Wang, Jianjun Zhang, Xiaoying Lü, Zhigong Wang
It is still challenging to achieve a complex grasp or fine finger control by using surface functional electrical stimulation (FES), which usually requires a precise electrode configuration under laboratory or clinical settings. The goals of this study are as follows: 1) to study the possibility of selectively activating individual fingers; 2) to investigate whether the current activation threshold and selective range of individual fingers are affected by two factors: changes in the electrode position and forearm rotation (pronation, neutral and supination); and 3) to explore a theoretical model for guidance of the electrode placement used for selective activation of individual fingers...
2018: PloS One
https://www.readbyqxmd.com/read/29322875/biomechanical-analysis-of-capsular-repair-versus-arthrex-tfcc-ulnar-tunnel-repair-for-triangular-fibrocartilage-complex-tears
#5
Jayson C Johnson, Ferris M Pfeiffer, Jill E Jouret, David M Brogan
BACKGROUND: This study compares the effectiveness of a peripheral capsular repair with a knotless arthroscopic transosseous ulnar tunnel repair (TR) in restoring distal radioulnar joint (DRUJ) stability and stiffness in the setting of a massive triangular fibrocartilage complex (TFCC) tear. METHODS: Eight matched pairs of fresh-frozen cadaveric forearms were tested. Each forearm was tested in supination and pronation using 3-dimensional (3D) optical tracking devices prior to any intervention...
January 1, 2018: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/29319572/vascularized-composite-allotransplantation-of-the-elbow-joint-a-cadaveric-study
#6
Mitchell A Pet, Angelo B Lipira, Yusha Liu, Dennis Kao, Jason H Ko
BACKGROUND: Surgical options for the unreconstructable elbow are limited to arthrodesis, total arthroplasty, or osteoarticular allograft reconstruction. Each of these options is limited by severe functional impairment and/or high complication rates. Vascularized allotransplantation of the elbow joint has the potential to mitigate these complications. In this study, we describe our technique for harvesting the elbow for vascularized joint transplantation and demonstrate the flap's vascularity using contrast angiography...
January 9, 2018: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/29317839/surgical-release-for-tubercular-elbow-stiffness
#7
Yun Qian, Qixin Han, Wei Wang, Yuanming Ouyang, Weien Yuan, Cunyi Fan
Background: For decades, tuberculosis (TB) has posed a great threat to people worldwide. Bone and joint TB is one of the most common types of extrapulmonary TB, with elbow TB comprising a small proportion of these cases. The treatment for elbow stiffness associated with TB has been rarely reported. Patients and methods: We retrospectively analyzed six patients (four females and two males) with tubercular elbow stiffness during a 7-year period. All of them received open arthrolysis and hinged external fixation to restore functional extension, flexion, supination and pronation...
2018: Infection and Drug Resistance
https://www.readbyqxmd.com/read/29315829/effects-of-acute-isometric-resistance-exercise-on-cervicomedullary-motor-evoked-potentials
#8
James L Nuzzo, Benjamin K Barry, Simon C Gandevia, Janet L Taylor
Cervicomedullary motor evoked potentials (CMEPs) in relaxed biceps brachii have been reported to facilitate after acute isometric exercise of the elbow flexors. This facilitation, which reflects either enhanced corticospinal transmission or increased motoneurone excitability, has only been documented in the limb posture used during exercise. In Experiment 1, we tested if these spinal changes "transfer" to a second posture. Fourteen individuals completed 12 sets of high-force isometric contractions of the elbow flexors with the forearm pronated...
January 6, 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29310915/effect-of-disease-duration-on-functional-outcomes-and-complications-after-arthrolysis-in-patients-with-elbow-stiffness
#9
Wei Zheng, Jialin Song, Ziyang Sun, Jiazhi Liu, Shuai Chen, Cunyi Fan
HYPOTHESIS: The purpose of this study was to determine the effect of a long duration of elbow stiffness on functional outcomes and complications after arthrolysis. METHODS: Participants included consecutive patients with a long duration of elbow stiffness (≥5 years, n = 23) and control patients matched for age, sex, and initial injury type (n = 46). All patients underwent elbow arthrolysis combined with hinged external fixation between March 2014 and March 2016...
January 5, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29305049/muscle-activity-during-maximal-isometric-forearm-rotation-using-a-power-grip
#10
Joseph Bader, Michael R Boland, Desney Greybe, Arthur Nitz, Timothy Uhl, David Pienkowski
This study aimed to provide quantitative activation data for muscles of the forearm during pronation and supination while using a power grip. Electromyographic data was collected from 15 forearm muscles in 11 subjects while they performed maximal isometric pronating and supinating efforts in nine positions of forearm rotation. Biceps brachii was the only muscle with substantial activation in only one effort direction. It was significantly more active when supinating (µ = 52.1%, SD = 17.5%) than pronating (µ = 5...
December 15, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29302139/single-stage-surgery-using-calcium-sulfate-pellets-in-association-with-tumor-resection-as-treatment-for-intraosseous-hemangioma-of-the-radius-shaft-in-a-2-year-old-boy
#11
Antonio Andreacchio, Flavia Alberghina, Vanessa Giacometti, Lorenza Marengo, Federico Canavese
Intraosseous hemangiomas are uncommon benign vascular tumors. Here the authors report a case of intraosseous hemangioma of the radial shaft in a 2-year-old boy, surgically treated by tumor mass resection and application of calcium sulfate pellets with no signs of relapse over a 2-year follow-up. Moreover, the lesion healed with new bone formation, and the last plain radiographs suggested homogenous normal trabecular bone density. The radius grew in length and remodeled to an almost normal shape. Clinically, elbow flexion-extension and forearm pronation and supination were within normal limits at the last follow-up visit...
December 2017: Journal of Hand and Microsurgery
https://www.readbyqxmd.com/read/29290603/axial-load-transmission-through-the-elbow-during-forearm-rotation
#12
Jung-Taek Hwang, Youngbok Kim, Daniel R Bachman, Maegan N Shields, Lawrence J Berglund, Alessandro T Fitzsimmons, James S Fitzsimmons, Shawn W O'Driscoll
BACKGROUND: Forearm rotation is closely associated with the axiorotational force transmission through the elbow joint. A technique has been developed to study the transmission of force across the radiocapitellar and ulnotrochlear joints during forearm rotation. METHODS: Ten human cadaveric upper limbs were prepared on a custom-designed apparatus that permits the application of extrinsic axial loads across an intact cadaveric elbow joint. A force-sensitive transducer was inserted into the elbow joint of each cadaver...
December 28, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29247970/comprehensive-biomechanical-characterization-of-feet-in-usma-cadets-comparison-across-race-gender-arch-flexibility-and-foot-types
#13
Jinsup Song, Kersti Choe, Michael Neary, Rebecca A Zifchock, Kenneth L Cameron, Michael Trepa, Marian T Hannan, Howard Hillstrom
Lower extremity musculoskeletal injuries are common, complex, and costly problems. Literature supports associations between static foot structure and dynamic foot function, as well as between overuse injury and demographic characteristics. Previous studies failed to provide a comprehensive biomechanical foot characteristics of at-risk military personnel. In this study, foot structure, function, and arch height flexibility (AHF) were objectively measured in 1090 incoming cadets (16.3% female, mean age of 18...
December 6, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29247135/don-t-neglect-the-clock-drawing-test
#14
Michal Vinker Shuster, Maayan Hannah, Zalut Todd
INTRODUCTION: A 63-year-old, right-handed woman with a history of hypertension presented to the ED with left arm paresis of 2 days duration. Three weeks before admission, she had flu-like symptoms with intermittent left arm weakness that had recovered briefly but recurred 2 days prior to her presentation. On neurological examination, GCS was 15 and cranial nerves' function was normal. Left upper limb strength was 4/5. There was left arm drift and pronation but the patient denied noticing any difference between the positions of her arms...
January 2018: Emergency Medicine Journal: EMJ
https://www.readbyqxmd.com/read/29242803/as-a-definitive-choice-of-treatment-joint-and-defect-spanning-multiplanar-tubular-external-fixation-in-the-management-of-pediatric-open-defective-supracondylar-humerus-fracture-a-case-report
#15
Mehmet Demirel, Onur Tunali, Ismail Turkmen, Yavuz Saglam
Introduction: Although supracondylar fractures of the humerus are common in children, open fractures of are extremely rare injuries. Gustilo- Anderson Type-III fractures in the upper extremity are primarily associated with considerable bone loss resulting from high energy trauma. In this study, a case of open pediatric supracondylar humerus fracture treated by a joint and defect spanning multiplanar tubular external fixation is presented. Case Report: A boy aged 3 years suffered from a Gustilo-Anderson Type-IIIA supracondylar humerus fractures...
September 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/29241814/a-new-method-to-locate-the-radial-head-safe-zone-on-computed-tomography-axial-views
#16
Y Zhan, C F Luo, Y J Chen
PURPOSE: Direct location of a "safe zone" on a CT axial view is inadequate because the radial head is circular in shape. Previous "safe zone" location methods are not appropriate if the physician is unable to visualize the actual radial head. This study aims to introduce a new method to locate the "safe zone" on CT. METHODS: CT scans were performed on 20 intact cadaveric upper limbs from 20 different corpses in full pronation and supination. The DICOM-format raw data were then re-sliced and analyzed in Mimics 17...
December 11, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29234659/accessory-muscle-of-the-flexor-digitorum-superficialis-and-its-clinical-implications
#17
Edie Benedito Caetano, João José Sabongi Neto, Lucas Augusto Ayres Ribas, Edson Vinícius Milanello
Anatomical variations of the flexor digitorum superficialis (FDS) muscle and tendon unit are frequently reported by anatomists and clinicians. Anatomical muscle variations of the FDS and its tendons may include variations of muscle belly, presence of accessory or duplicate tendons, abnormal tendon connections, and absence of muscle or tendon components. Such variations may or may not have clinical implications. This report presents a case not described previously: a unilateral accessory muscle of the flexor digitorum superficialis which was connected by a thick tendon to the flexor digitorum superficialis muscle; it was directed proximally to the insertion of the medial epicondyle of the humerus, next to the superficialis head of the pronator teres muscle...
November 2017: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/29231799/the-minimally-invasive-approach-for-distal-radius-fractures-and-malunions
#18
Philippe A Liverneaux
This article reviews the author's currently used minimal invasive approach for volar plating of distal radius fractures. A single longitudinal incision of 1.5 cm is drawn on the lateral aspect of the flexor carpi radialis tendon in order to insert a plate under the pronator quadratus. With the wrist flexed, the plate is applied on the anterior cortex of the radius to reduce the fracture. This approach offers the advantage of preserving ligamentotaxis, which facilitates the reduction, and the small scar improves the cosmetics...
January 1, 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/29229548/tongue-protrusions-modify-the-syntax-of-skilled-reaching-for-food-by-the-mouse-evidence-for-flexibility-in-action-selection-and-shared-hand-mouth-central-modulation-of-action
#19
Ian Q Whishaw, Behroo Mirza Agha, Jessica R Kuntz, Qandeel, Jamshid Faraji, Majid H Mohajerani
Skilled reaching for food by the laboratory mouse has the appearance of an action pattern with a distinctive syntax in which ten submovements occur in an orderly sequence. A mouse locates the food by Sniffing, Lifts, Aims, Advances, and Shapes the hand to Pronate it over a food target that it Grasps, Retracts, and Withdraws to Release to its mouth for eating. The structure of the individual actions in the chain are useful for the study of the mouse motor system and contribute to the use of the mouse as a model of human neurological conditions...
December 8, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/29224947/functional-outcomes-of-compression-plating-and-bone-grafting-for-operative-treatment-of-nonunions-about-the-forearm
#20
Deirdre K Regan, Alexander M Crespo, Sanjit R Konda, Kenneth A Egol
PURPOSE: To describe one center's experience with nonunion of one or both bones of the forearm and report on the functional recovery of patients treated for a single- or 2-bone forearm nonunion. METHODS: We performed a retrospective analysis of 23 patients who presented to our institution over an 11-year period and underwent surgical repair of a forearm nonunion (radius, ulna, or both bones). The main outcome measurements included time to union, visual analog scale pain scores, range of motion, Short Musculoskeletal Function Assessment scores, and postoperative complications...
December 7, 2017: Journal of Hand Surgery
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