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Supraspinatus

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https://www.readbyqxmd.com/read/29339205/agreement-of-musculoskeletal-ultrasound-and-clinical-assessment-of-shoulder-impairment-in-manual-wheelchair-users-with-various-duration-of-spinal-cord-injury
#1
Margaret Finley, David Ebaugh, Thomas Trojian
OBJECTIVE: To determine agreement of musculoskeletal ultrasound (MSK-US) findings of shoulder pathology and related shoulder special test results in individuals with varied duration of manual wheelchair (MWC) use following spinal cord injury (SCI) and determine if shoulder musculoskeletal impairments, per MSK-US and clinical examination, differed in individuals with SCI and varying duration of MWC use. DESIGN: Cross-sectional cohort study SETTING: Laboratory setting PARTICIPANTS: Twenty-three adult volunteers with SCI who used a MWC for community mobility...
January 12, 2018: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/29338908/relationship-between-neuropathy-proximal-to-the-suprascapular-nerve-and-rotator-cuff-tear-in-a-rodent-model
#2
Yasuhito Sasaki, Nobuyasu Ochiai, Eiko Hashimoto, Yu Sasaki, Takeshi Yamaguchi, Takehiro Kijima, Koji Akimoto, Seiji Ohtori, Kazuhisa Takahashi
BACKGROUND: Rotator cuff tears are believed to coexist with cervical spine lesions. In cases of preexisting neuropathy, such as cervical spine lesions, fatty degeneration has likely already occurred due to the neuropathy. In these cases, rotator cuff tear is thought to occur easily because of preexisting extensive fatty degeneration and degeneration of the tendons due to neuropathy. This study aimed to evaluate the effects of paralysis due to neuropathy proximal to the suprascapular nerve on the supraspinatus and infraspinatus tendons using a rat model of brachial plexus paralysis...
January 12, 2018: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/29337026/effect-of-recombinant-human-growth-hormone-on-rotator-cuff-healing-after-arthroscopic-repair-preliminary-result-of-a-multicenter-prospective-randomized-open-label-blinded-end-point-clinical-exploratory-trial
#3
Joo Han Oh, Seok Won Chung, Kyung-Soo Oh, Jae Chul Yoo, Wonhee Jee, Jung-Ah Choi, Yang-Soo Kim, Jin-Young Park
BACKGROUND: This study evaluated the effect of systemic injection of recombinant human growth hormone (rhGH) on outcomes after arthroscopic rotator cuff repair. METHODS: This multicenter, prospective, randomized, comparative trial, randomized patients who underwent arthroscopic repair of large-sized rotator cuff tears into 3 groups: rhGH 4 mg group (n = 26), rhGH 8 mg group (n = 24) , and control group (n = 26). Sustained release rhGH was injected subcutaneously once weekly for 3 months postoperatively...
January 11, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29329904/assembly-maturation-and-degradation-of-the-supraspinatus-enthesis
#4
REVIEW
Peter T Jensen, Kate L Lambertsen, Lars H Frich
The development of the rotator cuff enthesis is still poorly understood. The processes in the early and late developmental steps are gradually elucidated, but it is still unclear how cell activities are coordinated during development and maturation of the structured enthesis. This review summarizes current knowledge about development and age-related degradation of the supraspinatus enthesis. Healing and repair of an injured and degenerated supraspinatus enthesis also remain a challenge, as the original graded transitional tissue of the fibrocartilaginous insertion is not re-created after the tendon is surgically reattached to bone...
January 10, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29328887/macroscopic-rotator-cuff-tendinopathy-and-histopathology-do-not-predict-repair-outcomes-of-rotator-cuff-tears
#5
Paul M Sethi, Chirag D Sheth, Leo Pauzenberger, Mary Beth R McCarthy, Mark P Cote, Emma Soneson, Seth Miller, Augustus D Mazzocca
BACKGROUND: Numerous studies have identified factors that may affect the chances of rotator cuff healing after surgery. Intraoperative tendon quality may be used to predict healing and to determine type of repair and/or consideration of augmentation. There are no data that correlate how gross tendon morphology and degree of tendinopathy affect patient outcome or postoperative tendon healing. Purpose/Hypothesis: The purposes of this study were to (1) compare the gross appearance of the tendon edge during arthroscopic rotator cuff repair with its histological degree of tendinopathy and (2) determine if gross appearance correlated with postoperative repair integrity...
January 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29325703/the-prevalence-and-morphometric-analysis-of-ossified-superior-transverse-scapular-ligaments-in-patients-with-rotator-cuff-tears
#6
Jung Youn Kim, Yong Girl Rhee
BACKGROUND: The prevalence of ossified superior transverse scapular ligaments (OSTSLs) in rotator cuff tears (RCTs) has not yet been determined. The purposes of this study were to evaluate the prevalence of OSTSLs in RCTs and to investigate the correlation between OSTSL morphology and supraspinatus muscle atrophy. METHODS: We analyzed a total of 213 patients with RCTs for whom 3-dimensional (3D) computed tomography (CT) and magnetic resonance imaging were performed prior to arthroscopic procedures...
January 8, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29324450/quantification-of-myosin-heavy-chain-isoform-mrna-transcripts-in-the-supraspinatus-muscle-of-vertical-clinger-primates
#7
Josep Maria Potau, Rosa Artells, Carmen Muñoz, Júlia Arias-Martorell, Juan Francisco Pastor, Félix Jesús de Paz, Mercedes Barbosa, Gaëlle Bello-Hellegouarch, Alejandro Pérez-Pérez
Vertical clinging is a specialized form of locomotion characteristic of the primate family Callitrichidae. Vertical clinging requires these pronograde primates to maintain a vertical posture, so the protraction of their forelimbs must resist gravity. Since pronograde primates usually move as horizontal quadrupeds, we hypothesized that the supraspinatus muscle of vertical clingers would present specific characteristics related to the functional requirements imposed on the shoulder area by vertical clinging. To test this hypothesis, we quantified by real-time quantitative polymerase chain reaction the mRNA transcripts of myosin heavy chain (MHC) isoforms in the supraspinatus muscle of 15 species of pronograde primates, including vertical clingers...
January 12, 2018: Folia Primatologica; International Journal of Primatology
https://www.readbyqxmd.com/read/29319733/biomechanic-and-histologic-analysis-of-fibroblastic-effects-of-tendon-to-bone-healing-by-transforming-growth-factor-%C3%AE-1-tgf-%C3%AE-1-in-rotator-cuff-tears
#8
Chong Zhang, Yu-Jie Liu
PURPOSE: To evaluate the effect of transforming growth factor β1 (TGF-β1) on tendon-to-bone reconstruction of rotator cuff tears. METHODS: Seventy-two rat supraspinatus tendons were transected and reconstructed in situ. At 8 and 16 weeks, specimens of three groups; that is control, L-dose (low dose), and H-dose (high dose) were harvested and underwent a biomechanical test to evaluate the maximum load and stiffness values. Histology sections of the tendon-to-bone interface were identified by hematoxylin-eosin or Masson trichrome stain...
December 2017: Acta Cirúrgica Brasileira
https://www.readbyqxmd.com/read/29314867/location-of-rotator-cuff-tear-initiation-a-magnetic-resonance-imaging-study-of-191-shoulders
#9
Jeung Yeol Jeong, Seul Ki Min, Keun Min Park, Yong Bok Park, Kwang Joon Han, Jae Chul Yoo
BACKGROUND: Degenerative rotator cuff tears (RCTs) are generally thought to originate at the anterior margin of the supraspinatus tendon. However, a recent ultrasonography study suggested that they might originate more posteriorly than originally thought, perhaps even from the isolated infraspinatus (ISP) tendon, and propagate toward the anterior supraspinatus. Hypothesis/Purpose: It was hypothesized that this finding could be reproduced with magnetic resonance imaging (MRI). The purpose was to determine the most common location of degenerative RCTs by using 3-dimensional multiplanar MRI reconstruction...
January 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29313270/ultrasound-elastography-based-assessment-of-the-elasticity-of-the-supraspinatus-muscle-in-impingement-syndrome-does-elastography-has-any-diagnostic-value
#10
Adnan Demirel, Murat Baykara, Tuba Tülay Koca, Ejder Berk
Ultrasound elastography (UE) is a new ultrasound-based imaging technique that provides information about elasticity and stiffness of tissues. This cross-sectional study aimed to identify the diagnostic importance of UE in supraspinatus impingement syndrome. Forty-one subjects, aged 38-70 years, were included in the study. UE was used to determine the elasticity of the supraspinatus muscle. The strain ratio was calculated as the evaluation criteria to measure the elasticity of the muscle. High strain ratio indicated low elasticity...
January 8, 2018: Clinical Rheumatology
https://www.readbyqxmd.com/read/29311489/retained-myogenic-potency-of-human-satellite-cells-from-torn-rotator-cuff-muscles-despite-fatty-infiltration
#11
Masashi Koide, Yoshihiro Hagiwara, Masahiro Tsuchiya, Makoto Kanzaki, Hiroyasu Hatakeyama, Yukinori Tanaka, Takashi Minowa, Taro Takemura, Akira Ando, Takuya Sekiguchi, Yutaka Yabe, Eiji Itoi
Rotator cuff tears (RCTs) are a common shoulder problem in the elderly that can lead to both muscle atrophy and fatty infiltration due to less physical load. Satellite cells, quiescent cells under the basal lamina of skeletal muscle fibers, play a major role in muscle regeneration. However, the myogenic potency of human satellite cells in muscles with fatty infiltration is unclear due to the difficulty in isolating from small samples, and the mechanism of the progression of fatty infiltration has not been elucidated...
2018: Tohoku Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29309442/superior-capsular-reconstruction-clinical-outcomes-after-minimum-2-year-follow-up
#12
Alan M Hirahara, Wyatt J Andersen, Alberto J Panero
Superior capsular reconstruction (SCR) is performed to reduce the pain and disability caused by irreparable supraspinatus rotator cuff tears (RCTs). In this article, we discuss 9 cases of irreparable rotator cuff tears managed with arthroscopic SCR with dermal allograft. At minimum 2-year follow-up (mean, 32.38 months), the patients were prospectively evaluated on the American Shoulder and Elbow Surgeons (ASES) shoulder index, a visual analog scale (VAS) for pain, acromial-humeral distance, and ultrasonography...
November 2017: American Journal of Orthopedics
https://www.readbyqxmd.com/read/29309090/effect-of-ultrasonography-on-student-learning-of-shoulder-anatomy-and-landmarks
#13
Kristen D de Vries, Rebecca Brown, Joseph Mazzie, Min-Kyung Jung, Sheldon C Yao, Michael J Terzella
Context: Ultrasonography is becoming more common in clinical use, and it has been shown to have promising results when introduced into medical school curricula. Objective: To determine whether the use of ultrasonography as an educational supplement can improve osteopathic medical students' confidence and ability to locate 4 specific shoulder anatomical landmarks: the coracoid process, the transverse process of T1, the long head of the biceps within the bicipital groove, and the supraspinatus tendon...
January 1, 2018: Journal of the American Osteopathic Association
https://www.readbyqxmd.com/read/29306754/quantification-of-upper-limb-electromyographic-measures-and-dysfunction-of-breast-cancer-survivors-during-performance-of-functional-dynamic-tasks
#14
Rebecca L Brookham, Alan C Cudlip, Clark R Dickerson
BACKGROUND: Upper limb morbidities within the breast cancer population can interfere with completing daily life activities. Current knowledge of upper limb capabilities is limited; previous increases in muscle activation on the affected cancer side suggest this population works at a higher fraction of their capability. The purposes of this study were to describe upper limb capabilities and dysfunction of breast cancer survivors through muscle activation monitoring via surface electromyography and muscle-specific strength tests during functional tasks...
December 29, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/29306551/effects-of-tear-size-and-location-on-predictions-of-supraspinatus-tear-propagation
#15
R Matthew Miller, James Thunes, Volker Musahl, Spandan Maiti, Richard E Debski
Rotator cuff tears remain a significant clinical problem with a high incidence rate and severe clinical burden. Previous computational models developed to study rotator cuff tears have not modeled tissue damage and tear propagation. The objective of this study was to predict tear propagation for various combinations of tear size and location using an experimentally validated finite element model of supraspinatus tendon. It was hypothesized that larger rotator cuff tears propagate at lower loads than smaller tears, and that posterior tears require higher loads to propagate than anterior tears...
December 15, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29298726/effects-of-bone-marrow-aspirate-concentrate-and-platelet-rich-plasma-on-patients-with-partial-tear-of-the-rotator-cuff-tendon
#16
Sang Jun Kim, Eun Kyung Kim, Sun Jeong Kim, Da Hyun Song
BACKGROUND: We compared the clinical course of rotator cuff tears between rotator cuff exercise and bone marrow aspirate concentration (BMAC)-platelet rich plasma (PRP) injection to identify the therapeutic effects of BMAC-PRP on partial tear of the rotator cuff tendon. METHODS: Twenty-four patients with partial tear of the rotator cuff tendon participated in this study. Twelve patients underwent extraction of BMACs and PRP and received the injection of BMAC-PRP at the tear site under ultrasound guidance...
January 3, 2018: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29298261/automated-three-dimensional-measurement-of-glenoid-version-and-inclination-in-arthritic-shoulders
#17
Pascal Boileau, Damien Cheval, Marc-Olivier Gauci, Nicolas Holzer, Jean Chaoui, Gilles Walch
BACKGROUND: Preoperative computed tomography (CT) measurements of glenoid version and inclination are recommended for planning glenoid implantation in shoulder arthroplasty. However, current manual or semi-automated 2-dimensional (2D) and 3-dimensional (3D) methods are user-dependent and time-consuming. We assessed whether the use of a 3D automated method is accurate and reliable to measure glenoid version and inclination in osteoarthritic shoulders. METHODS: CT scans of osteoarthritic shoulders of 60 patients scheduled for shoulder arthroplasty were obtained...
January 3, 2018: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29282062/supraspinatus-muscle-elasticity-measured-with-real-time-shear-wave-ultrasound-elastography-correlates-with-mri-spectroscopic-measured-amount-of-fatty-degeneration
#18
Fabian Gilbert, Detlef Klein, Andreas Max Weng, Herbert Köstler, Benedikt Schmitz, Jonas Schmalzl, Dirk Böhm
BACKGROUND: Fatty Degeneration (FD) of the rotator cuff muscles influences functional and anatomical outcome after rotator cuff repair. The MRI based estimation of fatty degeneration is the gold standard. There is some evidence that Ultrasound elastography (EUS) can detect local differences of tissue stiffness in muscles and tendons. Shear-wave elastography (SWE) was evaluated to determine the extent to which shear wave velocity was associated with measures of fatty degeneration. MRI-spectroscopic fat measurement was used as a reference to quantify the amount of fat in the muscle belly...
December 28, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29277261/the-contribution-of-the-supraspinatus-muscle-at-sub-maximal-contractions
#19
David Phillips, Peter Kosek, Andrew Karduna
During maximum effort, the supraspinatus muscle contributes approximately 50% of the torque need to elevate the arm, but this has not been examined at sub-maximal levels. The purpose of this study was to determine the contribution of the supraspinatus muscle to shoulder elevation at sub-maximal levels. Seven healthy subjects (four males, three females) performed isometric ramp contractions at the shoulder. Middle deltoid electromyography (EMG) and force applied at the wrist were collected before and after a suprascapular nerve block...
December 15, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29274903/early-versus-late-repair-of-rotator-cuff-tears-in-rats
#20
Leonardo Cavinatto, Eduardo Angeli Malavolta, Cesar Augusto Martins Pereira, Manuela Miranda-Rodrigues, Luiza Campos Moreira Silva, Cecilia Helena Gouveia, Cesar de Cesar Netto, Rames Mattar Junior, Arnaldo Amado Fereira Neto
BACKGROUND: In the event of a traumatic rotator cuff tear, patients are routinely advised that early surgical intervention produces an optimal repair, despite a lack of direct evidence to support this recommendation. To address this knowledge gap, massive rotator cuff tears in rats were assessed by biomechanical and bone morphometric analyses after early or late repair. METHODS: Combined supraspinatus and infraspinatus tendon tears of the left shoulder were created in 21 adult Wistar rats, which were divided into 2 groups...
December 21, 2017: Journal of Shoulder and Elbow Surgery
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