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https://www.readbyqxmd.com/read/28724735/dual-function-of-the-pectoral-girdle-for-feeding-and-locomotion-in-white-spotted-bamboo-sharks
#1
Ariel L Camp, Bradley Scott, Elizabeth L Brainerd, Cheryl D Wilga
Positioned at the intersection of the head, body and forelimb, the pectoral girdle has the potential to function in both feeding and locomotor behaviours-although the latter has been studied far more. In ray-finned fishes, the pectoral girdle attaches directly to the skull and is retracted during suction feeding, enabling the ventral body muscles to power rapid mouth expansion. However, in sharks, the pectoral girdle is displaced caudally and entirely separate from the skull (as in tetrapods), raising the question of whether it is mobile during suction feeding and contributing to suction expansion...
July 26, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28711169/the-risk-of-suprascapular-and-axillary-nerve-injury-in-reverse-total-shoulder-arthroplasty-an-anatomic-study
#2
Tim Leschinger, Michael Hackl, Eduard Buess, Sebastian Lappen, Martin Scaal, Lars Peter Müller, Kilian Wegmann
PURPOSE: Implantation of a reverse total shoulder arthroplasty (rTSA) places the axillary and suprascapular nerves at risk. The aim of this anatomic study was to digitally analyse the location of these nerves in relation to bony landmarks in order to predict their path and thereby help to reduce the risk of neurological complications during the procedure. METHODS: A total of 22 human cadaveric shoulder specimens were used in this study. The axillary and suprascapular nerves were dissected, and radiopaque threads were sutured onto the nerves without mobilizing the nerves from their native paths...
June 28, 2017: Injury
https://www.readbyqxmd.com/read/28650238/three-dimensional-inverse-dynamics-of-the-forelimb-of-beagles-at-a-walk-and-trot
#3
Emanuel Andrada, Lars Reinhardt, Karin Lucas, Martin S Fischer
OBJECTIVE To perform 3-D inverse dynamics analysis of the entire forelimb of healthy dogs during a walk and trot. ANIMALS 5 healthy adult Beagles. PROCEDURES The left forelimb of each dog was instrumented with 19 anatomic markers. X-ray fluoroscopy was used to optimize marker positions and perform scientific rotoscoping for 1 dog. Inverse dynamics were computed for each dog during a walk and trot on the basis of data obtained from an infrared motion-capture system and instrumented quad-band treadmill. Morphometric data were obtained from a virtual reconstruction of the left forelimb generated from a CT scan of the same dog that underwent scientific rotoscoping...
July 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28614274/corrective-osteotomy-for-symptomatic-clavicle-malunion-using-patient-specific-osteotomy-and-reduction-guides
#4
Mathias Haefeli, Matthias Schenkel, Ralf Schumacher, Karim Eid
Midshaft clavicular fractures are often treated nonoperatively with good reported clinical outcome in a majority of patients. However, malunion with shortening of the affected clavicle is not uncommon. Shortening of the clavicle has been shown to affect shoulder strength and kinematics with alteration of scapular position. Whereas the exact clinical impact of these factors is unknown, the deformity may lead to cosmetic and functional impairment as for example pain with weight-bearing on the shoulder girdle...
September 2017: Techniques in Hand & Upper Extremity Surgery
https://www.readbyqxmd.com/read/28376941/systematic-evaluation-of-skeletal-fractures-caused-by-induction-of-electroconvulsive-seizures-in-rat-state-a-need-for-attention-and-refinement-of-the-procedure
#5
Maria Ekemohn, Marie Kjær Nielsen, Matilda Grahm, Anders Tingström, Birgitte Kousholt, Gregers Wegener, Cecilie Bay-Richter
OBJECTIVE: Electroconvulsive therapy (ECT) is one of the most efficient treatments for major depression. Electroconvulsive seizures (ECS), the animal model of ECT, is widely used to study both mechanisms of action and adverse effects of ECT. As the treatment itself serves as an instant anaesthetic and anaesthetic agents may affect memory functions and behaviour, ECS is traditionally administered without muscle relaxation and anaesthesia. A major problem of unmodified ECS, which has only been addressed peripherally in the literature, is that some animals sustain spinal fractures and subsequent hind leg paralysis (paraplegia)...
April 5, 2017: Acta Neuropsychiatrica
https://www.readbyqxmd.com/read/28126419/determining-3d-scapular-orientation-with-scapula-models-and-biplane-2d-images
#6
Kristen F Nicholson, R Tyler Richardson, Freeman Miller, James G Richards
This study evaluated a strategy for identifying 3D scapulothoracic orientation using bilateral X-ray scans and 3D scapula models. Both subject-specific scapula models and a scaled general model were utilized. 3D scapulothoracic orientations obtained from X-rays were compared to motion capture data. "Subjects" consisted of a skeletal model of a human torso and ten real bone scapulae. Retroreflective markers were placed on the scapulae and a three-marker triad was placed on the trunk. Marker positions were recorded using an eight camera motion capture system...
March 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28116263/delayed-presentation-of-osteochondroma-at-superior-angle-of-scapula-a-case-report
#7
Mohit Jindal
INTRODUCTION: Osteochondroma or exostosis is most common primary benign bony tumor comprising of more than one third of the total occurrences. Osteochondromas are considered as an aberration in the normal physial growth plate and originate from the metaphysis of long bone with more than third (35-46%) of cases affecting the bone around the knee (lower end femur> upper end tibia), 10% cases involve the small bones of the hand and 5% involve the pelvis and flat bones like scapula (4-6%) are least involved...
July 2016: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/27858226/conversions-from-anatomic-shoulder-replacements-to-reverse-total-shoulder-arthroplasty-do-the-indications-for-initial-surgery-influence-the-clinical-outcome-after-revision-surgery
#8
Malte Holschen, Bastian Franetzki, Kai-Axel Witt, Dennis Liem, Jörn Steinbeck
INTRODUCTION: The most frequent indications for anatomic shoulder replacement are glenohumeral osteoarthritis and fractures of the humeral head. If anatomic shoulder prostheses fail, reverse total shoulder arthroplasty is often the only remaining treatment option. This study evaluates the influence of indications for primary shoulder arthroplasty on the clinical outcome after conversion to reverse total shoulder arthroplasty. MATERIALS AND METHODS: From 2010 to 2012, 44 failed shoulder arthroplasties were converted to reverse total shoulder arthroplasty...
February 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/27822004/the-morphometric-anatomy-of-the-delto-fulcral-triangle-a-3d-ct-based-reconstruction-study
#9
N Naidoo, L Lazarus, K S Satyapal, L De Wilde, A Van Tongel
This study introduced the new delto-fulcral triangle (DFT), the first anatomical model of its kind. As seen from the orthopaedician's supraspinatus-outlet view, the antero-superior point of the coracoid process along with the lateral- and posterior-most acromial landmarks form the boundaries of the DFT. Since these osseous scapular landmarks accounted for both dynamic and static stabilisers of the glenohumeral joint, knowledge of the anatomical features of the DFT may prove beneficial to the orthopaedic surgeon...
March 2017: Journal of Orthopaedics
https://www.readbyqxmd.com/read/27799716/the-effects-of-wall-slide-and-sling-slide-exercises-on-scapular-alignment-and-pain-in-subjects-with-scapular-downward-rotation
#10
Tae-Ho Kim, Jin-Yong Lim
[Purpose] The present study was performed to evaluate the changes in the scapular alignment, pressure pain threshold and pain in subjects with scapular downward rotation after 4 weeks of wall slide exercise or sling slide exercise. [Subjects and Methods] Twenty-two subjects with scapular downward rotation participated in this study. The alignment of the scapula was measured using radiographic analysis (X-ray). Pain and pressure pain threshold were assessed using visual analogue scale and digital algometer. Patients were assessed before and after a 4 weeks of exercise...
September 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/27340203/shoulder-girdle-rotation-forelimb-movement-and-the-influence-of-carapace-shape-on-locomotion-in-testudo-hermanni-testudinidae
#11
Manuela Schmidt, Martin Mehlhorn, Martin S Fischer
Studies into the function of structures are crucial for making connections between morphology and behaviour of organisms, but are still rare for the terrestrial Testudinidae. We investigated the kinematics of shoulder girdle and forelimb motion in Hermann's tortoise Testudo hermanni using biplanar X-ray fluoroscopy with a twofold aim: firstly, to understand how the derived shapes of shoulder girdle and carapace together influence rotation of the girdle; and, secondly, to understand how girdle rotation affects forelimb excursion...
September 1, 2016: Journal of Experimental Biology
https://www.readbyqxmd.com/read/27133738/nonoperative-management-of-a-large-extrapleural-hematoma-after-blunt-chest-trauma
#12
Luis Gorospe, María Ángeles Fernández-Méndez, Ana Ayala-Carbonero, Alberto Cabañero-Sánchez, Gemma María Muñoz-Molina
BACKGROUND: An extrapleural hematoma (EH) is an uncommon and potentially life-threatening condition defined as the accumulation of blood in the extrapleural space between the parietal pleura and the endothoracic fascia. EH usually occurs after blunt thoracic trauma causing fractures of the sternum and ribs, which can tear the intercostal or internal mammary vessels. Typical radiological findings of EH are a biconvex opacity on the involved hemithorax and the so-called displaced "extrapleural fat sign...
August 2016: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/27019904/-surgical-treatment-and-construction-for-traumatic-floating-shoulder
#13
Li-feng Zhai, Hua Xu, Yi-min Chen, Da-wei Bi
OBJECTIVE: To explore surgical therapeutic strategies and clinical effects for floating shoulder injury. METHODS: From March 2010 to December 2013, 12 patients with floating shoulder injury were treated by open reduction and plate screw fixation,including 10 males and 2 females aged from 22 to 45 years old with an average of 31.7 years old. Preoperative X-ray and CT showed 11 cases were ipsilateral clavicle fracture with scapular neck fractures, 1 case was scapular neck fracture with ipsilateral acromioclavicular dislocation...
January 2016: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/26999967/-clinical-and-radiological-results-of-fractures-of-the-proximal-humerus-treated-with-intramedullary-nailing-and-possible-risk-factors-of-a-poor-outcome
#14
E Casado-Sanz, R Barco-Laakso, S Antuña-Antuña
BACKGROUND: To assess the clinical and radiological results of fractures of the proximal humerus treated with intramedullary nail fixation as well as the risk factors associated with a poor outcome. METHODS: Patients were analyzed retrospectively with a minimum follow-up of one year. An objective clinical assessment was made using the Constant scale, the subjective satisfaction scale, VAS, and the DASH scale to measure disability. The radiological assessment included AP and axial X-rays in the scapular plane...
May 2015: Acta Ortopédica Mexicana
https://www.readbyqxmd.com/read/26981052/the-axillary-view-typically-does-not-contribute-to-decision-making-in-care-for-proximal-humeral-fractures
#15
Marschall B Berkes, Joshua S Dines, Jacqueline F Birnbaum, Lionel E Lazaro, Tristan C Lorich, Milton T M Little, Joseph T Nguyen, Dean G Lorich
BACKGROUND: Convention dictates that an axillary view be obtained when evaluating proximal humerus fractures (PHF). However, the axillary view is frequently omitted because of pain and technical considerations. Furthermore, its diagnostic utility is unclear in this setting. QUESTIONS/PURPOSES: The purpose of this study was to (1) determine the rate of obtaining an adequate axillary X-ray and complete shoulder series at a level I trauma center, (2) understand the cost of ordering and attempting an axillary radiograph, and (3) determine if axillary radiographs influence the management of PHF...
October 2015: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
https://www.readbyqxmd.com/read/26629853/snapping-scapular-syndrome-secondary-to-rib-intramedullary-fixation-device
#16
Ezequiel E Zaidenberg, Luciano A Rossi, Santiago L Bongiovanni, Ignacio Tanoira, Gaston Maignon, Maximiliano Ranalletta
BACKGROUND: Scapulo-thoracic joint disorders, including bursitis and crepitus, are commonly misdiagnosed problems and can be a source of persistent pain and dysfunction PRESENTATION OF THE CASE: This article describes an unusual case of a snapping scapula syndrome secondary to a migration through the lateral cortex of a rib splint intramedullary fixation device into the scapulothoracic joint. DISCUSSION: Recently, the operative fixation of multiple ribs fractures with intramedullary fixation devices has become popular...
2015: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/26521994/long-stem-reverse-shoulder-arthroplasty-and-cerclage-for-treatment-of-complex-long-segment-proximal-humeral-fractures-with-diaphyseal-extension-in-patients-more-than-65-years-old
#17
Raffaele Garofalo, Brody Flanagin, Alessandro Castagna, Eddie Y Lo, Sumant G Krishnan
INTRODUCTION: Treatment of long segment proximal humeral fractures with extension below the surgical neck into the diaphysis remains a significant challenge for orthopaedic surgeons. The purpose of this paper was to evaluate the clinical and radiological outcomes following primary long-stem RSA with cerclage fixation for complex long segment proximal humeral fractures with diaphyseal extension in patients more than 65 years old. MATERIAL AND METHODS: Between February 2010 and March 2013, 22 patients who suffered a complex proximal humerus fracture with extended diaphyseal involvement underwent surgery with long-stem RSA and cerclages fixation...
December 2015: Injury
https://www.readbyqxmd.com/read/26440607/derivation-and-validation-of-two-decision-instruments-for-selective-chest-ct-in-blunt-trauma-a-multicenter-prospective-observational-study-nexus-chest-ct
#18
MULTICENTER STUDY
Robert M Rodriguez, Mark I Langdorf, Daniel Nishijima, Brigitte M Baumann, Gregory W Hendey, Anthony J Medak, Ali S Raja, Isabel E Allen, William R Mower
BACKGROUND: Unnecessary diagnostic imaging leads to higher costs, longer emergency department stays, and increased patient exposure to ionizing radiation. We sought to prospectively derive and validate two decision instruments (DIs) for selective chest computed tomography (CT) in adult blunt trauma patients. METHODS AND FINDINGS: From September 2011 to May 2014, we prospectively enrolled blunt trauma patients over 14 y of age presenting to eight US, urban level 1 trauma centers in this observational study...
October 2015: PLoS Medicine
https://www.readbyqxmd.com/read/26255008/-clinical-analysis-of-the-first-patient-with-imported-middle-east-respiratory-syndrome-in-china
#19
Yun Ling, Rong Qu, Yufeng Luo
OBJECTIVE: To report the treatment of the first imported Middle East respiratory syndrome ( MERS ) in China, and to investigate the clinical features and treatment of the patient. METHODS: On May 28th, 2015, the first patient of imported MERS to China was admitted to Department of Critical Care Medicine of Huizhou Municipal Central Hospital. The clinical features and treatments of this patient were analyzed. RESULTS: (1) A 43 years old male of South Korean nationality was admitted with the complaint of back ache for 7 days and fever 2 days with the following characteristics: back ache 7 days ago, without fever or cough or expectoration...
August 2015: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/26047748/-thrombosed-scapular-intramuscular-venous-malformation-a-pediatric-case-report
#20
A Fekir, X Balguerie, I Bardoux, J-N Dacher, P-H Vivier
Venous malformation (VM) is a frequent soft tissue mass in children that should not be confused with vascular tumors. We report the case of a 10-year-old boy with a bulky thrombosed VM of the shoulder with functional disability. D-dimer levels were high. Pathognomonic phleboliths were demonstrated on conventional x-rays. Echo-doppler confirmed the venous nature of the lesion and areas without flow suspicious for thrombosis. MRI provides the deep extension and can show non-calcified thrombi that are difficult to see with ultrasound...
July 2015: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
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