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https://www.readbyqxmd.com/read/29048929/the-effect-of-hamstring-tendon-autograft-harvest-on-the-restoration-of-knee-stability-in-the-setting-of-concurrent-anterior-cruciate-ligament-and-medial-collateral-ligament-injuries
#1
Thomas J Kremen, Landon S Polakof, Sean S Rajaee, Trevor J Nelson, Melodie F Metzger
BACKGROUND: A hamstring autograft is commonly used in anterior cruciate ligament (ACL) reconstruction (ACLR); however, there is evidence to suggest that the tendons harvested may contribute to medial knee instability. HYPOTHESIS: We tested the hypothesis that the gracilis (G) and semitendinosus (ST) tendons significantly contribute to sagittal, coronal, and/or rotational knee stability in the setting of ACLR with a concurrent partial medial collateral ligament (MCL) injury...
October 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29047517/relationship-between-foot-eversion-and-thermographic-foot-skin-temperature-after-running
#2
Jose Ignacio Priego Quesada, Marina Gil-Calvo, Irene Jimenez-Perez, Ángel G Lucas-Cuevas, Pedro Pérez-Soriano
The main instruments to assess foot eversion have some limitations (especially for field applications), and therefore it is necessary to explore new methods. The objective was to determine the relationship between foot eversion and skin temperature asymmetry of the foot sole (difference between medial and lateral side), using infrared thermography. Twenty-two runners performed a running test lasting 30 min. Skin temperature of the feet soles was measured by infrared thermography before and after running. Foot eversion during running was measured by kinematic analysis...
July 1, 2017: Applied Optics
https://www.readbyqxmd.com/read/29046416/it-s-just-sand-between-the-toes-how-particle-size-and-shape-variation-affect-running-performance-and-kinematics-in-a-generalist-lizard
#3
Philip J Bergmann, Kyle J Pettinelli, Marian E Crockett, Erika G Schaper
Animals must cope with and be able to move effectively on a variety of substrates. Substrates composed of granular media, such as sand and gravel, are extremely common in nature, and vary tremendously in particle size and shape. Despite many studies of the properties of granular media and comparisons of locomotion between granular and solid substrates, the effects of systematically manipulating these media on locomotion is poorly understood. We studied granular media ranging over four orders of magnitude in particle size, and differing in the amount of particle shape variation, to determine how these factors affected substrate physical properties and sprinting in the generalist lizard Eremias arguta We found that media with intermediate particle sizes had high bulk densities, low angles of stability and low load-bearing capacities...
October 15, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29045439/3d-reconstruction-of-human-movement-in-a-single-projection-by-dynamic-marker-scaling
#4
Erez James Cohen, Riccardo Bravi, Diego Minciacchi
The three dimensional (3D) reconstruction of movement from videos is widely utilized as a method for spatial analysis of movement. Several approaches exist for a 3D reconstruction of movement using 2D video projection, most of them require the use of at least two cameras as well as the application of relatively complex algorithms. While a few approaches also exist for 3D reconstruction of movement with a single camera, they are not widely implemented due to tedious and complicated methods of calibration. Here we propose a simple method that allows for a 3D reconstruction of movement by using a single projection and three calibration markers...
2017: PloS One
https://www.readbyqxmd.com/read/29045279/leaflet-kinematics-of-mechanical-and-bioprosthetic-aortic-valve-prostheses
#5
Bernhard Vennemann, Thomas Rösgen, Paul Philipp Heinisch, Dominik Obrist
The hemodynamic performance of artificial aortic valves (AVs) and the probability for structural valve deterioration can be linked to the valve kinematics. Comparability among different studies is limited because of variations in the experimental setups and physiologic boundary conditions. This study presents results of kinematic measurements of bioprosthetic and mechanical AVs that were tested in an identical experimental setting such that they can be directly compared with each other. The kinematics of AVs is typically presented in the form of the geometric orifice area and its temporal evolution...
October 18, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/29044677/sagittal-plane-walking-patterns-are-related-to-mri-changes-over-18-months-in-people-with-and-without-mild-moderate-hip-osteoarthritis
#6
Deepak Kumar, Cory Wyatt, Sonia Lee, Narihiro Okazaki, Ko Chiba, Thomas M Link, Richard B Souza, Sharmila Majumdar
The purpose was to evaluate the association of sagittal plane gait mechanics with MRI changes in the hip joint over 18-months. Subjects with and without radiographic hip OA (n = 57) underwent MRI at baseline and 18 months for grading of cartilage lesions, bone marrow lesions (BML), cysts, and labral tears. 3D gait analyses at baseline were used for sagittal plane hip kinematics and kinetics during the stance phase. Subjects were classified as progressors or non-progressors based on increase in any MRI OA parameter...
October 18, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29044561/aquatic-treadmill-water-level-influence-on-pelvic-limb-kinematics-in-cranial-cruciate-ligament-deficient-dogs-with-surgically-stabilised-stifles
#7
G Bertocci, C Smalley, N Brown, K Bialczak, D Carroll
OBJECTIVE: To compare pelvic limb joint kinematics and temporal gait characteristics during land-based and aquatic-based treadmill walking in dogs that have undergone surgical stabilisation for cranial cruciate ligament deficiency. MATERIALS AND METHODS: Client-owned dogs with surgically stabilised stifles following cranial cruciate ligament deficiency performed three walking trials consisting of three consecutive gait cycles on an aquatic treadmill under four water levels...
October 17, 2017: Journal of Small Animal Practice
https://www.readbyqxmd.com/read/29044202/the-effects-of-exoskeleton-assisted-knee-extension-on-lower-extremity-gait-kinematics-kinetics-and-muscle-activity-in-children-with-cerebral-palsy
#8
Zachary F Lerner, Diane L Damiano, Thomas C Bulea
Individuals with cerebral palsy often exhibit crouch gait, a debilitating and inefficient walking pattern marked by excessive knee flexion that worsens with age. To address the need for improved treatment, we sought to evaluate if providing external knee extension assistance could reduce the excessive burden placed on the knee extensor muscles as measured by knee moments. We evaluated a novel pediatric exoskeleton designed to provide appropriately-timed extensor torque to the knee joint during walking in a multi-week exploratory clinical study...
October 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29042544/origami-based-tunable-truss-structures-for-non-volatile-mechanical-memory-operation
#9
Hiromi Yasuda, Tomohiro Tachi, Mia Lee, Jinkyu Yang
Origami has recently received significant interest from the scientific community as a method for designing building blocks to construct metamaterials. However, the primary focus has been placed on their kinematic applications by leveraging the compactness and auxeticity of planar origami platforms. Here, we present volumetric origami cells-specifically triangulated cylindrical origami (TCO)-with tunable stability and stiffness, and demonstrate their feasibility as non-volatile mechanical memory storage devices...
October 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/29042161/kinematic-evaluation-for-impairment-of-skilled-hand-function-in-chemotherapy-induced-peripheral-neuropathy
#10
Michihiro Osumi, Masahiko Sumitani, Hiroaki Abe, Yuko Otake, Shin-Ichiro Kumagaya, Shu Morioka
INTRODUCTION: Chemotherapy-induced peripheral neuropathy (CIPN) usually affects both sensory and motor function of hands and feet, resulting in impaired skilled hand function (e.g., typing a keyboard). However, quantitative and objective evaluations for this condition have not been established. PURPOSE OF THE STUDY: We evaluated skilled hand function using a kinematic analysis and investigated relationships among hand kinematic function and the clinical sensory and motor features of CIPN...
October 14, 2017: Journal of Hand Therapy: Official Journal of the American Society of Hand Therapists
https://www.readbyqxmd.com/read/29041932/stamps-development-and-verification-of-swallowing-kinematic-analysis-software
#11
Woo Hyung Lee, Changmook Chun, Han Gil Seo, Seung Hak Lee, Byung-Mo Oh
BACKGROUND: Swallowing impairment is a common complication in various geriatric and neurodegenerative diseases. Swallowing kinematic analysis is essential to quantitatively evaluate the swallowing motion of the oropharyngeal structures. This study aims to develop a novel swallowing kinematic analysis software, called spatio-temporal analyzer for motion and physiologic study (STAMPS), and verify its validity and reliability. METHODS: STAMPS was developed in MATLAB, which is one of the most popular platforms for biomedical analysis...
October 17, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/29041823/therapists-cues-influence-lower-limb-muscle-activation-and-kinematics-during-gait-training-in-subacute-stroke
#12
Michelle Ploughman, Jennifer Shears, Susan Quinton, Cordell Flight, Michelle O'Brien, Phillip MacCallum, Megan C Kirkland, Jeannette M Byrne
PURPOSE: Symmetrical gait is a key goal of rehabilitation post-stroke. Therapists employ techniques such as verbal instruction and haptic cues to increase activation of paretic muscles. We examined whether verbal or tactile cueing altered spatiotemporal gait parameters, kinematics and electromyography (EMG) of lower limb muscles on the more-affected side within a training session. MATERIALS AND METHODS: Patients (n = 10) were recruited from rehabilitation services (<9 months post-stroke)...
October 17, 2017: Disability and Rehabilitation
https://www.readbyqxmd.com/read/29041686/development-of-precision-elliptic-neutron-focusing-supermirror
#13
Takuya Hosobata, Norifumi L Yamada, Masahiro Hino, Yutaka Yamagata, Toshihide Kawai, Hisao Yoshinaga, Koichiro Hori, Masahiro Takeda, Shin Takeda, Shin-Ya Morita
This paper details methods for the precision design and fabrication of neutron-focusing supermirrors, based on electroless nickel plating. We fabricated an elliptic mirror for neutron reflectometry, which is our second mirror improved from the first. The mirror is a 550-millimeter-long segmented mirror assembled using kinematic couplings, with each segment figured by diamond cutting, polished using colloidal silica, and supermirror coated through ion-beam sputtering. The mirror was evaluated with neutron beams, and the reflectivity was found to be 68-90% at a critical angle...
August 21, 2017: Optics Express
https://www.readbyqxmd.com/read/29040955/protective-role-of-epigallocatechin-3-gallate-on-arsenic-induced-testicular-toxicity-in-swiss-albino-mice
#14
Pushpa Rani Guvvala, Janivara Parameswaraiah Ravindra, Chukkath Vijayan Rajani, Muniandy Sivaram, Sellappan Selvaraju
Arsenic, often referred to as the king of poisons is carcinogenic in humans and animals. It affects multiorgan systems including reproduction. The present study was undertaken to explore the protective role of green tea compound, epigallocatechin-3-gallate (EGCG) on arsenic induced testicular toxicity in Swiss albino mice. Thirty two adult male mice were randomly assigned to four groups (n=8). Group I served as control without test chemical. The group II received arsenic (200ppm) through drinking water, group III received only EGCG (20mg/kgb...
October 13, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29040298/relative-mobility-of-the-pelvis-and-spine-during-trunk-axial-rotation-in-chronic-low-back-pain-patients-a-case-control-study
#15
Masashi Taniguchi, Hiroshige Tateuchi, Satoko Ibuki, Noriaki Ichihashi
BACKGROUND: Trunk axial rotation is a risk factor for chronic low back pain (CLBP). The characteristics of rotational mobility in the pelvis and spine among CLBP patients are not fully understood. PURPOSE: The purpose of this study was to examine three-dimensional kinematic changes, and to compare the differences of rotational mobility and coupled motion, in patients with and without CLBP. METHODS: Fifteen patients with CLBP and 15 age and sex matched healthy subjects participated in this study...
2017: PloS One
https://www.readbyqxmd.com/read/29040061/validation-of-a-novel-biomechanical-test-bench-for-the-knee-joint-with-six-degrees-of-freedom
#16
Christian H Heinrichs, Dominik Knierzinger, Hannes Stofferin, Werner Schmoelz
A novel biomechanical test bench has been developed for in-vitro evaluation of the knee joint. The test bench allows the kinematics of the knee joint to be studied in all six degrees of freedom. Flexion-extension knee movements are induced by quadriceps and hamstring muscle forces simulated by five pneumatic cylinders. The kinematics of the knee and the actively applied muscle forces are measured simultaneously. The aim of this study was to validate the sensitivity and reproducibility of this novel test bench...
October 17, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/29039871/superior-capsular-reconstruction
#17
Robert U Hartzler, Stephen S Burkhart
Superior capsular reconstruction (SCR) of the shoulder has recently gained popularity as an option for joint-preserving shoulder surgery for patients with an irreparable rotator cuff tear. In the absence of glenohumeral arthritis, rotator cuff tear irreparability should only be diagnosed for most patients after a careful diagnostic arthroscopy. Superior capsular reconstruction adds biological, passive, superior constraint to the glenohumeral joint, thereby optimizing the rotator cuff force couples and improving joint kinematics...
October 1, 2017: Orthopedics
https://www.readbyqxmd.com/read/29038311/integration-of-swimming-kinematics-and-ram-suspension-feeding-in-a-model-american-paddlefish-polyodon-spathula
#18
Grant E Haines, S Laurie Sanderson
Ram suspension-feeding fishes swim with an open mouth to force water through the oral cavity and extract prey items that are too small to be pursued individually. Recent research has indicated that, rather than using a dead-end mechanical sieve, American paddlefish (Polyodon spathula Walbaum) employ vortical cross-step filtration. In this filtration mechanism, vortical flow that is generated posterior to the branchial arches organizes crossflow filtration processes into a spatial structure across the gill rakers...
October 16, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29037663/unilateral-forelimb-sensorimotor-cortex-devascularization-disrupts-the-topographic-and-kinematic-characteristics-of-hand-movements-while-string-pulling-for-food-in-the-rat
#19
Ashley A Blackwell, William L Widick, Joseph L Cheatwood, Ian Q Whishaw, Douglas G Wallace
String-pulling by the rat is a bimanual act, in which an upright animal retrieves a piece of food attached to the end of the string by downward hand-over-hand movements. The present study compared the movements of string-pulling, using topographic and kinematic measures of hand movement, in control rats and rats with unilateral sensorimotor motor cortex lesion produced by removal of the pia matter. In the first week following devascularization, the rhythmicity and accuracy of string-pulling movements decomposed; however, thereafter the rhythm of bilateral alternation was restored...
October 13, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/29037642/rebound-boots-change-lower-limb-muscle-activation-and-kinematics-during-different-fitness-exercises
#20
Mateus Rossato, Rodolfo André Dellagrana, Juliane Cristine Lopes Dos Santos, Felipe P Carpes, Rodrigo Ghedini Gheller, De Angelys de Ceselles Seixas da Silva, Ewertton de Souza Bezerra, João Otacílio Libardoni Dos Santos
The purpose of this study was to evaluate electromyography and kinematic parameters of the lower limbs using rebound boots (RB) and barefoot during a gym workout. This information can be helpful to practitioners to schedule rehabilitation and training programs. Ten women (25 ± 9 years) volunteered for the study; inclusion criteria were as follows: subjects must have experienced the use of RB and the analyzed exercises for at least 6 months, and have no previous injuries in the lower limbs. Seven exercises were performed for 30 s with the RB and subsequently barefoot...
October 2017: Journal of Bodywork and Movement Therapies
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