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Glenohumeral joint

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https://www.readbyqxmd.com/read/28822639/level-of-the-subscapularis-split-during-arthroscopic-latarjet
#1
Alexandre L├Ądermann, Patrick J Denard, Paolo Arrigoni, Pablo Narbona, Stephen S Burkhart, Johannes Barth
PURPOSE: To determine the location of the subscapularis split during arthroscopic Latarjet created by an inside-out technique passing a switching stick from the posterior portal across the glenohumeral joint. METHODS: An inside-out technique was used to arthroscopically create a subscapularis split in 20 fresh-frozen human cadaveric shoulders. The distance between the exit point of the switching stick and the upper border of the subscapularis and the anterior circumflex vessels was measured arthroscopically and after open dissection...
August 16, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28819610/a-rare-case-of-massive-rotator-cuff-tear-and-biceps-tendon-rupture-with-posterior-shoulder-dislocation-in-a-young-adult-surgical-decision-making-and-outcome
#2
En Loong Soon, Hamid Rahmatullah Bin Abd Razak, Andrew Hwee Chye Tan
INTRODUCTION: Massive rotator cuff tears (RCTs) in the context of shoulder dislocations are relatively uncommon in the young adult (<40 years) and if reported are more commonly described in association with acute traumatic anterior glenohumeral dislocations. They have rarely been described with posterior dislocations, regardless of patient age. This is the 1(st) case reported in the context of posterior dislocations, where a triad of biceps tendon rupture, posterior dislocation, and RCTs was observed during surgery...
March 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28819606/intra-articular-loose-body-with-concomitant-bankart-lesion-after-a-traumatic-shoulder-dislocation-a-case-report
#3
Jason B T Lim, Andrew H C Tan
INTRODUCTION: The spectrum of pathoanatomic lesions encountered in anterior shoulder dislocation is broad. There could be a presence of loose bodies, chondral and osteochondral, in the shoulder joint and also concomitant rotator cuff partial tears resulting from acute and chronic shoulder instability. CASE REPORT: We present one case report of a 46-year-old male Chinese with an uncommon case of Bankart lesion, with a full thickness chondral defect over the superior glenoid articular surface manifesting as a large intra-articular loose cartilaginous body...
March 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28818450/development-and-delivery-of-a-physiotherapist-led-exercise-intervention-in-a-randomised-controlled-trial-for-subacromial-impingement-syndrome-the-support-trial
#4
Kay Stevenson, Sue Jackson, Julie Shufflebotham, Edward Roddy, Nadine E Foster
PURPOSE: This paper describes the development, content and delivery of a physiotherapist- led individualised, supervised and progressed exercise programme for use in a factorial randomised controlled trial testing treatments for subacromial impingement syndrome. METHODS: To develop the intervention, a survey of community physiotherapists and national guidelines provided the basis for a consensus workshop through which a protocol was developed for the SUPPORT trial physiotherapist-led exercise programme (SUPPORT: SUbacromial impingement syndrome and Pain: a randomised controlled trial Of exeRcise and injection)...
March 24, 2017: Physiotherapy
https://www.readbyqxmd.com/read/28814589/ureaplasma-parvum-causing-life-threatening-disease-in-a-susceptible-patient
#5
Alexander Korytny, Roni Nasser, Yuval Geffen, Tom Friedman, Mical Paul, Nesrin Ghanem-Zoubi
A 56-year-old man with lymphoma developed orchitis followed by septic arthritis of his right glenohumeral joint. Synovial fluid cultures were negative but PCR amplification test was positive forUreaplasmaparvum. The patient was treated with doxycycline. Two and a half years later, the patient presented with shortness of breath and grade III/IV diastolic murmur on auscultation. Echocardiography revealed severely dilated left heart chambers, severe aortic regurgitation and several mobile masses on the aortic valve cusps suspected to be vegetations...
August 16, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28813911/design-and-kinematic-analysis-of-a-novel-upper-limb-exoskeleton-for-rehabilitation-of-stroke-patients
#6
Amin Zeiaee, Rana Soltani-Zarrin, Reza Langari, Reza Tafreshi
This paper details the design process and features of a novel upper limb rehabilitation exoskeleton named CLEVER (Compact, Low-weight, Ergonomic, Virtual/Augmented Reality Enhanced Rehabilitation) ARM. The research effort is focused on designing a lightweight and ergonomic upper-limb rehabilitation exoskeleton capable of producing diverse and perceptually rich training scenarios. To this end, the knowledge available in the literature of rehabilitation robotics is used along with formal conceptual design techniques...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813910/reference-path-generation-for-upper-arm-exoskeletons-considering-scapulohumeral-rhythms
#7
Rana Soltani-Zarrin, Amin Zeiaee, Reza Langari, Nina Robson
This paper proposes a reference path generation method for upper-limb rehabilitation exoskeletons considering the scapulohumeral rhythms of the shoulder. The developed method is based on Central Nervous System's (CNS) governing rules for coordination of arm motions, and to the best of our knowledge is the first computational model to consider the motion of the inner shoulder in path generation. Existing reference generation methods which utilize computational models such as minimum jerk, minimum torque, etc, are based on the assumption that the shoulder joint does not move, and the origin of the reference frame is defined at the center of the glenohumeral (GH) joint...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28792929/new-gliding-mammaliaforms-from-the-jurassic
#8
Qing-Jin Meng, David M Grossnickle, Di Liu, Yu-Guang Zhang, April I Neander, Qiang Ji, Zhe-Xi Luo
Stem mammaliaforms are Mesozoic forerunners to mammals, and they offer critical evidence for the anatomical evolution and ecological diversification during the earliest mammalian history. Two new eleutherodonts from the Late Jurassic period have skin membranes and skeletal features that are adapted for gliding. Characteristics of their digits provide evidence of roosting behaviour, as in dermopterans and bats, and their feet have a calcaneal calcar to support the uropagatium as in bats. The new volant taxa are phylogenetically nested with arboreal eleutherodonts...
August 9, 2017: Nature
https://www.readbyqxmd.com/read/28783492/shoulder-muscle-atrophy-and-its-relation-to-strength-loss-in-obstetrical-brachial-plexus-palsy
#9
Christelle Pons, Frances T Sheehan, Hyun Soo Im, Sylvain Brochard, Katharine E Alter
BACKGROUND: Treatment/prevention of shoulder muscle strength imbalances are major therapeutic goals for children with obstetrical brachial plexus palsy. The study aims were to characterize muscle atrophy in children/adolescents with unilateral obstetrical brachial plexus palsy, to quantify the agonist-antagonist muscle volume balance and the association between muscle volume and strength. METHODS: Eight boys and four girls (age=12.1, standard deviation=3.3) participated in this case-control study...
July 27, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28777666/shoulder-bone-geometry-affects-the-active-and-passive-axial-rotational-range-of-the-glenohumeral-joint
#10
Alexander Humphries, Srdjan Cirovic, Aliah F Shaheen
BACKGROUND: The range of motion of the glenohumeral joint varies substantially among individuals and is dependent on humeral position. How variation in shape of the humerus and scapula affects shoulder axial range of motion at various positions has not been established. PURPOSE: To quantify variation in the shape of the glenohumeral joint and investigate whether the scapula and humerus geometries affect the axial rotational range of the glenohumeral joint. STUDY DESIGN: Descriptive laboratory study...
August 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28777219/anterior-glenohumeral-instability
#11
Adam Pickett, Steven Svoboda
Anterior shoulder dislocations, subluxations, and recurrent instability of the shoulder joint are common problems usually affecting a young active population. However, it can be a problem for patients up to the late decades in life and can lead to major shoulder arthropathy if left untreated or improperly treated. This article discusses the natural history, pathologic morphologic changes of the shoulder joint associated with anterior instability along with normal anatomic variants. We will also discuss current treatment recommendations and possible causes of the patient with recurrent instability despite prior stabilization procedures...
September 2017: Sports Medicine and Arthroscopy Review
https://www.readbyqxmd.com/read/28777217/the-epidemiology-of-glenohumeral-joint-instability-incidence-burden-and-long-term-consequences
#12
Kenneth L Cameron, Timothy C Mauntel, Brett D Owens
Acute traumatic glenohumeral joint instability is common within the general population and endemic in young athletes and physically active populations. Individuals who experience acute traumatic glenohumeral joint instability events are at high risk of recurrent injury. In addition, glenohumeral joint instability results in substantial short-term and long-term consequences, including significant time loss from activity, degenerative joint changes, and reduced quality of life. This review provides an overview of the epidemiology of glenohumeral joint instability, reviews the modifiable and nonmodifiable risk factors for glenohumeral joint instability identified in the literature, and discusses the need for developing and implementing effective multilevel strategies for the primary, secondary, and tertiary prevention of glenohumeral joint instability and the long-term consequences associated with injury...
September 2017: Sports Medicine and Arthroscopy Review
https://www.readbyqxmd.com/read/28777215/bone-loss-and-glenohumeral-instability
#13
David J Tennent, Michael A Donohue, Matthew A Posner
Glenohumeral instability secondary to glenohumeral bone loss presents a complex problem to the treating surgeon because of the complex biomechanics of the glenohumeral joint and its reliance on numerous dynamic and static stabilizers. The role of glenoid bone loss, specifically inferior-anterior glenoid bone loss, has been well characterized in the setting of recurrent unidirectional instability with greatly improved clinical results when following an algorithmic reconstructive approach to the location and percentage of overall bone loss...
September 2017: Sports Medicine and Arthroscopy Review
https://www.readbyqxmd.com/read/28777214/recurrent-shoulder-instability-after-primary-bankart-repair
#14
Michael A Donohue, Timothy C Mauntel, Jonathan F Dickens
The glenohumeral joint is one of the most frequently dislocated joints and occurs with increasing frequency in collision and contact athletes, especially those in sports that repeatedly place the glenohumeral joint in a position of vulnerability. Nonoperative management of shoulder instability especially in young contact athletes results in unacceptably high recurrence rates; thus, early surgical stabilization has become commonplace. Surgical stabilization typically yields acceptable outcomes. However, recurrent anterior instability may occur following a previous stabilization procedure at rates of 7% to 12%...
September 2017: Sports Medicine and Arthroscopy Review
https://www.readbyqxmd.com/read/28777213/glenohumeral-instability-related-to-special-conditions-slap-tears-pan-labral-tears-and-multidirectional-instability
#15
Gregory S Van Blarcum, Steven J Svoboda
Glenohumeral instability is one of the more common conditions seen by sports medicine physicians, especially in young, active athletes. The associated anatomy of the glenohumeral joint (the shallow nature of the glenoid and the increased motion it allows) make the shoulder more prone to instability events as compared with other joints. Although traumatic dislocations or instability events associated with acute labral tears (ie, Bankart lesions) are well described in the literature, there exists other special shoulder conditions that are also associated with shoulder instability: superior labrum anterior/posterior (SLAP) tears, pan-labral tears, and multidirectional instability...
September 2017: Sports Medicine and Arthroscopy Review
https://www.readbyqxmd.com/read/28771373/biomechanical-evaluation-of-glenoid-reconstruction-with-an-implant-free-j-bone-graft-for-anterior-glenoid-bone-loss
#16
Leo Pauzenberger, Felix Dyrna, Elifho Obopilwe, Philipp R Heuberer, Robert A Arciero, Werner Anderl, Augustus D Mazzocca
BACKGROUND: The anatomic restoration of glenoid morphology with an implant-free J-shaped iliac crest bone graft offers an alternative to currently widely used glenoid reconstruction techniques. No biomechanical data on the J-bone grafting technique are currently available. PURPOSE: To evaluate (1) glenohumeral contact patterns, (2) graft fixation under cyclic loading, and (3) the initial stabilizing effect of anatomic glenoid reconstruction with the implant-free J-bone grafting technique...
August 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28768784/the-colonisation-of-the-glenohumeral-joint-by-propionibacterium-acnes-is-not-associated-with-frozen-shoulder-but-is-more-likely-to-occur-after-an-injection-into-the-joint
#17
S J Booker, M Boyd, S Gallacher, J P Evans, C Auckland, J Kitson, W Thomas, C D Smith
AIMS: Our aim was to investigate the prevalence of Propionibacterium (P.) acnes in the subcutaneous fat and capsule of patients undergoing shoulder surgery for frozen shoulder or instability. PATIENTS AND METHODS: A total of 46 patients undergoing either an arthroscopic capsular release or stabilisation had biopsies taken from the subcutaneous fat and capsule of the shoulder at the time of surgery. These samples were sent for culture in enrichment, and also for Nucleic Acid Amplification testing...
August 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28767480/combined-selective-nerve-blockade-and-local-infiltration-analgesia-in-a-total-shoulder-arthroplasty-patient-with-chronic-pain-and-severe-restrictive-lung-disease-a-case-report
#18
Jason K Panchamia, David A Olsen, Joaquin Sanchez-Sotelo, Adam W Amundson
Interscalene brachial plexus block is considered the most complete postoperative analgesia after total shoulder arthroplasty. Interscalene brachial plexus block-induced ipsilateral hemidiaphragmatic paralysis may not be tolerated in patients with preexisting pulmonary disease. Selective distal nerve blocks avoid the risk of phrenic nerve block; however, they may provide incomplete analgesia to the glenohumeral joint. We report a case of combined selective suprascapular and axillary nerve blockade in combination with local infiltration analgesia in a patient with severe lung disease undergoing total shoulder arthroplasty...
August 1, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/28763326/point-of-care-ultrasonography-findings-and-care-use-among-patients-undergoing-ultrasound-guided-shoulder-injections
#19
Se Won Lee, Timothy Tiu, Jeremy Roberts, Brian Lee, Matthew N Bartels, Mooyeon Oh-Park
OBJECTIVE: The aims of the study were to assess the overall reduction of pain in patients undergoing ultrasound-guided shoulder injections and to characterize the preinjection point-of-care ultrasound findings and use of clinical services postinjection including the use of magnetic resonance imaging and surgeries. DESIGN: Data of 172 patients who underwent ultrasound-guided subacromial subdeltoid injection or glenohumeral joint injection were reviewed for preinjection point-of-care ultrasound findings, change in pain intensity at 2 mos from baseline, and use of care at 6 mos' postinjection...
August 1, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28762500/myology-of-the-forelimb-of-majungasaurus-crenatissimus-theropoda-abelisauridae-and-the-morphological-consequences-of-extreme-limb-reduction
#20
Sara H Burch
Forelimb reduction occurred independently in multiple lineages of theropod dinosaurs. Although tyrannosaurs are renowned for their tiny, two-fingered forelimbs, the degree of their reduction in length is surpassed by abelisaurids, which possess an unusual morphology distinct from that of other theropods. The forelimbs of abelisaurids are short but robust and exhibit numerous crests, tubercles, and scars that allow for inferences of muscle attachment sites. Phylogenetically based reconstructions of the musculature were used in combination with close examination of the osteology in the Malagasy abelisaurid Majungasaurus to create detailed muscle maps of the forelimbs, and patterns of the muscular and bony morphology were compared with those of extant tetrapods with reduced or vestigial limbs...
August 1, 2017: Journal of Anatomy
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