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Shoulder anatomy

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https://www.readbyqxmd.com/read/29242802/resistant-non-union-of-humerus-after-intramedullary-nailing-treated-with-locking-compression-plate-with-bone-grafting-with-nail-in-situ-and-shoulder-spica-a-case-report
#1
Jagdeep Singh, Anoop Kalia, Kavin Khatri, Anshul Dahuja
Introduction: Humerus non-union is a challenging situation for the surgeon and devastating and morbid situation for the patient. Surgical approach to the humerus is demanding because of the complex neurovascular anatomy and especially when previous surgeries have been attempted. Case Report: We report a case of a young adult male who sustained a compound fracture of humerus shaft treated with intramedullary nailing followed by subsequent bone grafting and eventually landed up in non-union and was treated at our center by locking compression plate application with nail in situ with iliac crest autogenous bone graft followed by shoulder spica application...
September 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/29225162/can-ultrasound-be-used-to-improve-the-palpation-skills-of-physicians-in-training-a-prospective-study
#2
Ryan Woods, Steve J Wisniewski, Daniel R Lueders, Thomas P Pittelkow, Dirk R Larson, Jonathan T Finnoff
BACKGROUND: Accurate diagnosis of musculoskeletal disorders relies heavily upon the physical examination, including accurate palpation of musculoskeletal structures. The literature has suggested there has been deterioration of physical examination skills among medical students and residents in part due to increased reliance on advanced imaging. It has been shown that knowledge of musculoskeletal anatomy and physical examination skills improve with the use of ultrasound; however, the literature is limited...
December 7, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/29225017/qualitative-and-quantitative-anatomy-of-the-proximal-humerus-muscle-attachments-and-the-axillary-nerve-a-cadaveric-study
#3
Gilbert Moatshe, Daniel Cole Marchetti, Jorge Chahla, Márcio B Ferrari, George Sanchez, George F Lebus, Alex W Brady, Rachel M Frank, Robert F LaPrade, Matthew T Provencher
PURPOSE: To provide a quantitative and qualitative anatomic analysis of the pectoralis major, teres major, and latissimus dorsi on the humerus, as well as the deltoid tendinous attachments on the proximal humerus and acromion, and to quantitatively characterize the humeral course of the axillary nerve. METHODS: Ten nonpaired, fresh-frozen human cadaveric shoulders were analyzed. A portable coordinate-measuring device quantified the location of bony landmarks and tendon attachment areas...
December 7, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29215442/an-anatomic-morphological-study-of-occipital-spurs-in-human-skulls
#4
Monika Srivastava, Adil Asghar, Nitya Nand Srivastava, Nandkishore Gupta, Anuj Jain, Jayant Verma
Occipital spurs are quite common; however, they are also the source of frequent discomfort to the patients. Their role has been implicated in causation of pain at the base of skull, which may extend to shoulder limiting the movement of the shoulder and neck. The present was carried out to find out the prevalence of occipital spur in human skull and to find out the anatomic morphological characteristics of occipital spur. A total of 30 cadaveric skulls were examined in the Department of Anatomy, Uttar Pradesh University of Medical Sciences, for the presence of occipital spur...
December 6, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29205214/biomechanics-of-the-shoulder-girdle-a-case-study-on-the-effects-of-union-rugby-tackles
#5
Luís Faria, Bárbara Campos, Renato Natal Jorge
PURPOSE: The shoulder girdle is a complex system, comprised by a kinematic chain and stabilizers. Due to the delicate equilibrium and synchronism between mobility and stability, high external loads may compromise its physiology, increasing the risk of injuries. Thus, this study intends to fully characterize the effects of a rugby tackle on the shoulder's anatomy and physiology. METHODS: For the experimental procedures, a matrix of pressure sensors was used, based on the Teckscan® pressure in-soles, force plates, an isokinetic dynamometer and sEMG (surface electromyography)...
2017: Acta of Bioengineering and Biomechanics
https://www.readbyqxmd.com/read/29188140/forelimb-muscle-and-joint-actions-in-archosauria-insights-from-crocodylus-johnstoni-pseudosuchia-and-mussaurus-patagonicus-sauropodomorpha
#6
Alejandro Otero, Vivian Allen, Diego Pol, John R Hutchinson
Many of the major locomotor transitions during the evolution of Archosauria, the lineage including crocodiles and birds as well as extinct Dinosauria, were shifts from quadrupedalism to bipedalism (and vice versa). Those occurred within a continuum between more sprawling and erect modes of locomotion and involved drastic changes of limb anatomy and function in several lineages, including sauropodomorph dinosaurs. We present biomechanical computer models of two locomotor extremes within Archosauria in an analysis of joint ranges of motion and the moment arms of the major forelimb muscles in order to quantify biomechanical differences between more sprawling, pseudosuchian (represented the crocodile Crocodylus johnstoni) and more erect, dinosaurian (represented by the sauropodomorph Mussaurus patagonicus) modes of forelimb function...
2017: PeerJ
https://www.readbyqxmd.com/read/29138871/revision-shoulder-arthroplasty-with-a%C3%A2-reverse-shoulder-prosthesis-use-of-structural-allograft-for-glenoid-bone-loss
#7
S E Ozgur, R Sadeghpour, T R Norris
INTRODUCTION: Revision shoulder arthroplasty presents many unique and complex challenges when glenoid bone loss is involved. A distorted and medialized anatomy prevents the proper mechanics of the reverse prosthesis with regard to deltoid tension and ultimate function. This paper highlights one surgeon's experience using structural allograft for glenoid bone loss. PATIENTS AND METHODS: In all, 20 patients for a total of 24 surgeries with a medialized glenoid and/or substantial glenoid bone loss of grade IIB or higher were evaluated in this retrospective study...
December 2017: Der Orthopäde
https://www.readbyqxmd.com/read/29137087/isolated-tear-of-the-cord-like-middle-glenohumeral-ligament-in-buford-complex-a-case-report
#8
Byung-Ill Lee, Yong Beom Kim, Sung Hun Won, Shu Chiang Hwang, Sung-Woo Choi, Jae-Hwi Nho, Dong-Il Chun
RATIONALE: We describe a rare case of the isolated tear in the cord-like middle glenohumeral ligament (MGHL) in Buford complex. To the best of our knowledge, this is the first report in the English literature about the isolated tear of cord-like MGHL in Buford complex. The present report describes in detail our experience with the diagnosis of isolated tear of the cord-like MGHL in Buford complex and management. PATIENT CONCERNS: A 50-year-old female patient visited our hospital with pain and stiffness in the right shoulder that lasted for 9 months...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29133232/embryological-and-comparative-description-of-the-cephalic-vein-joining-the-external-jugular-vein-a-case-report
#9
R C Araújo, L A S Pires, M L Andrade, M C Perez, C S L Filho, M A Babinski
The cephalic vein arises from the radial end of the dorsal venous arch. It turns around the radial border of the forearm and passes proximally along the arm to the shoulder, where it enters the axillary vein by penetrating the clavipectoral triangle. The cephalic vein is prone to vary at the antecubital fossa, where it forms numerous anastomoses. A male cadaver fixated with a 10% formalin solution was dissected during regular anatomy lessons. It was found that the cephalic vein crossed the upper third of the arm between two fasciculi of the deltoid muscle and reached the shoulder, where it passed above the acromion and crossed the posterior border of the clavicle in order to join the external jugular vein...
November 10, 2017: Morphologie: Bulletin de L'Association des Anatomistes
https://www.readbyqxmd.com/read/29131235/anatomical-variations-of-brachial-plexus-in-fetal-cadavers
#10
Alparslan Kirik, Senem Ertuğrul Mut, Mehmet Kadri Daneyemez, Halil İbrahim Seçer
AIM: The plexus brachialis is a complex structure with anatomical variations and connections with neighboring tissues. These variations may cause disparity in the motor and sensorial innervations of the upper extremity. The knowledge of anatomy and probable variations are important for performing surgical procedures in the neck, shoulder and axilla. This study was planned to demonstrate the anatomical variations of infantile brachial plexus. MATERIAL AND METHODS: A total of 20 plexus brachialis from 11 fetal cadavers were dissected and examined microscopically...
October 18, 2017: Turkish Neurosurgery
https://www.readbyqxmd.com/read/29125205/reconstructing-pectoral-appendicular-muscle-anatomy-in-fossil-fish-and-tetrapods-over-the-fins-to-limbs-transition
#11
Julia L Molnar, Rui Diogo, John R Hutchinson, Stephanie E Pierce
The question of how tetrapod limbs evolved from fins is one of the great puzzles of evolutionary biology. While palaeontologists, developmental biologists, and geneticists have made great strides in explaining the origin and early evolution of limb skeletal structures, that of the muscles remains largely unknown. The main reason is the lack of consensus about appendicular muscle homology between the closest living relatives of early tetrapods: lobe-finned fish and crown tetrapods. In the light of a recent study of these homologies, we re-examined osteological correlates of muscle attachment in the pectoral girdle, humerus, radius, and ulna of early tetrapods and their close relatives...
November 10, 2017: Biological Reviews of the Cambridge Philosophical Society
https://www.readbyqxmd.com/read/29120003/a-novel-method-of-patient-positioning-using-shoulder-arthroscopy-equipment-for-elbow-arthroscopy
#12
Julianne M Kowalski, James T Monica
Indications for elbow arthroscopy are expanding; however, it is uncommon compared with shoulder arthroscopy. Elbow arthroscopy can be complicated by positioning, including the need to obtain specific arm holders required by most operating rooms. Surgery can be performed in the supine, prone, or lateral position. Arm traction allows for distraction of the joint space, full insufflation, and therefore visualization of intra-articular anatomy. This article outlines a new technique using previously available shoulder arthroscopy equipment to avoid increased cost incurred by procuring new, elbow-specific equipment...
November 8, 2017: Orthopedics
https://www.readbyqxmd.com/read/29114928/a-new-substitute-for-formalin-application-to-embalming-cadavers
#13
Yoshinori Haizuka, Miki Nagase, Satoshi Takashino, Yasushi Kobayashi, Yoshihisa Fujikura, George Matsumura
The development of formalin-free fixatives is an urgent issue in gross anatomy because of the health hazard and the tissue-hardening actions of formalin. We recently identified the fixative, antimicrobial, and preservative effects of N-vinyl-2-pyrrolidone (NVP), a precursor of the water-soluble macromolecular polymer polyvinylpyrrolidone, in animal experiments. The aim of the present study is to investigate whether NVP solution can be used as an alternative to formalin in human cadaveric dissection. Twelve donated cadavers were infused with NVP via the femoral and common carotid arteries using a peristaltic pump...
November 7, 2017: Clinical Anatomy
https://www.readbyqxmd.com/read/29114336/physical-exam-and-evaluation-of-the-unstable-shoulder
#14
María Valencia Mora, Miguel Ángel Ruiz Ibán, Jorge Diaz Heredia, Juan Carlos Gutiérrez-Gómez, Raquel Ruiz Diaz, Mikel Aramberri, Carlos Cobiella
Background: The clinical evaluation of the patient with shoulder instability can be challenging. The pathological spectrum ranges from the straightforward "recurrent anterior dislocation" patient to the overhead athlete with a painful shoulder but not clear instability episodes. Advances in shoulder arthroscopy and imaging have helped in understanding the anatomy and physiopathology of the symptoms. The aim of this general article is to summarize the main examination manoeuvres that could be included in an overall approach to a patient with a suspicion of instability...
2017: Open Orthopaedics Journal
https://www.readbyqxmd.com/read/29064862/stemless-prosthesis-for-total-shoulder-arthroplasty
#15
Mark D Lazarus, Ryan M Cox, Anand M Murthi, Ofer Levy, Joseph A Abboud
The fourth generation of humeral components currently are being used in anatomic shoulder arthroplasty. Anatomic shoulder arthroplasty implants have evolved to better re-create anatomy, improve fixation, preserve bone, and facilitate revision surgery. Most of the design changes for shoulder arthroplasty implants have centered on the humeral stem, with a transition to shorter, metaphyseal humeral stems. Many of these humeral component design changes may be beneficial; however, long-term studies are necessary to determine if the results of anatomic shoulder arthroplasty with the use of newer humeral components can match those of anatomic shoulder arthroplasty with the use of older humeral components...
October 20, 2017: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/29063680/development-of-a-physical-shoulder-simulator-for-the-training-of-basic-arthroscopic-skills
#16
Laura C McCracken, Ana Luisa Trejos, Marie-Eve LeBel, Behnaz Poursartip, Abelardo Escoto, Rajni V Patel, Michael D Naish
BACKGROUND: Orthopaedic training programs are incorporating arthroscopic simulations into their residency curricula. There is a need for a physical shoulder simulator that accommodates lateral decubitus and beach chair positions, has realistic anatomy, allows for an objective measure of performance and provides feedback to trainees. METHODS: A physical shoulder simulator was developed for training basic arthroscopic skills. Sensors were embedded in the simulator to provide a means to assess performance...
October 23, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/29063152/bone-grafts-used-for-arthroscopic-glenoid-reconstruction-restore-the-native-glenoid-anatomy
#17
Benjamin Bockmann, Arne Johannes Venjakob, Rolf Gebing, Frank Reichwein, Marthe Hagenacker, Wolfgang Nebelung
PURPOSE: Recurrent anterior instability of the glenohumeral joint is a demanding condition, especially in cases of glenoid bone loss. Various treatment options have been described, such as arthroscopic grafting techniques and the Latarjet procedure. In this study, the degree to which an arthroscopically applied iliac crest graft restores the glenoid anatomy was evalutated. METHODS: Nine patients (three women and six men) with an average age of 31 ± 9 years (21-46 years) who were treated with an arthroscopic iliac crest graft technique were included in this study...
October 23, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29023639/an-anatomical-and-mechanical-analysis-of-the-douc-monkey-genus-pygathrix-and-its-role-in-understanding-the-evolution-of-brachiation
#18
C D Byron, M C Granatosky, H H Covert
OBJECTIVES: Pygathrix is an understudied Asian colobine unusual among the Old World monkeys for its use of arm-swinging. Little data exists on the anatomy and mechanics of brachiation in this genus. Here, we consider this colobine to gain insight into the parallel evolution of suspensory behavior in primates. MATERIALS AND METHODS: This study compares axial and appendicular morphological variables of Pygathrix with other Asian colobines. Additionally, to assess the functional consequences of Pygathrix limb anatomy, kinematic and kinetic data during arm-swinging are included to compare the douc monkey to other suspensory primates (Ateles and Hylobates)...
October 11, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/29021876/coracoid-process-morphology-using-3d-ct-imaging-in-a-malaysian-population
#19
I I Imma, N M Nizlan, A R Ezamin, S Yusoff, M H Shukur
Introduction: The aims of this study are to define the coracoid process anatomy in a Malaysian population, carried out on patients in Hospital Serdang with specific emphasis on the dimension of the base of coracoid process which is important in coraco-acromial (CC) ligament reconstruction, to define the average amount of bone available for use in coracoid transfer, and to compare the size of coracoid process based on gender and race, and with findings in previous studies. Materials and Methods: Fifteen pairs of computed tomography (CT) based 3-dimensional models of shoulders of patients aged between 20 to 60 years old were examined...
July 2017: Malaysian Orthopaedic Journal
https://www.readbyqxmd.com/read/28991677/hurst-revisited-are-symptoms-and-signs-of-functional-motor-and-sensory-disorders-dependent-on-idea
#20
Jon Stone, Jennifer Mutch, Denis Giannokous, Ingrid Hoeritzauer, Alan Carson
INTRODUCTION: Symptoms and signs of functional (psychogenic) motor and sensory disorder are often said to be dependent on the patients' idea of what symptoms should be, rather than anatomy and physiology. This hypothesis has however rarely been tested. MATERIALS AND METHODS: Inspired by a brief experiment carried out in 1919 by neurologist Arthur Hurst we aimed to assess the views of healthy non-medical adults towards paralysis and numbness and their response to tests for functional disorders when asked to pretend to have motor and sensory symptoms...
October 15, 2017: Journal of the Neurological Sciences
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