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https://www.readbyqxmd.com/read/28814004/biomimetic-finger-extension-mechanism-for-soft-wearable-hand-rehabilitation-devices
#1
Dong Hyun Kim, Si-Hwan Heo, Hyung-Soon Park
For the rehabilitation and assistance of the hand functions, wearable devices have been developed, and the interest in tendon driven mechanisms have especially increased since it allows light weight and compact design. The tendon driven hand rehabilitation devices provides grasping force via exo-tendons routed on the dorsal and palmar sides of the hand pulled by remotely located actuators. However, most of the devices were not able to provide natural joint extension sequence of the finger and showed hyperextension of finger joints because the tendons for extension were fixed at the fingertip, concentrating the torque at the distal interphalangeal joint...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813987/personalized-design-of-a-hand-prosthesis-considering-anthropometry-of-a-real-hand-extracted-from-radiography
#2
E Castillo-Castaneda, A Bemardo-Vasquez
Commercially available prostheses do not meet patients' expectations regarding dimensions, shape and aesthetic reasons. This paper presents the design of an anthropomorphic and anthropometric prosthesis based on dimensions and shape extracted from a digitized radiograph of the healthy hand of the patient. The mobility of the hand is guaranteed by making a design of phalanges, joints, ligaments and tendons, as closest as possible to a real hand. The kinematic model is presented and validated. A proposal of the actuation system is also described...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813791/codification-mechanisms-of-wrist-position-sense
#3
Francesca Marini, Sara Contu, Pietro Morasso, Lorenzo Masia, Jacopo Zenzeri
Proprioceptive signals from cutaneous, joint, tendon and muscle receptors create the basis for bodily perception and are known to be essential for motor control. However, which are the mechanisms underlying the proprioceptive signals and which are the variables that affect them is still a matter of debate. In particular, what is worth to investigate is, namely, the codification of proprioceptive information related to pointing movements of the wrist towards kinesthetic targets. In this work we asked 10 healthy adults to perform with their wrist a robot-aided proprioceptive matching task, in which the starting position of the matching movements was shifted forward or backward, in order to ascertain to which extent such shifts cause target over/under estimation and how important is movement's length on task performance...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813788/a-novel-pneumatic-stimulator-for-the-investigation-of-noise-enhanced-proprioception
#4
Anna-Maria Georgarakis, Harshal A Sonar, Mike D Rinderknecht, Olivier Lambercy, Bernard J Martin, Verena Klamroth-Marganska, Jamie Paik, Robert Riener, Jaime E Duarte
Executing coordinated movements requires that motor and sensory systems cooperate to achieve a motor goal. Impairment of either system may lead to unstable and/or inaccurate movements. In rehabilitation training, however, most approaches have focused on the motor aspects of the control loop. We are examining mechanisms that may enhance the sensory system to improve motor control. More precisely, the effects of stochastic subliminal vibratory tactile stimulation on wrist proprioception. We developed a device - based on a novel soft pneumatic actuator skin technology - to stimulate multiple sites simultaneously and independently...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813744/alkaptonuria-a-case-report-with-diagnostic-challenge
#5
Vasantha L Gali, Amy M Kerkvliet, Jacob M Kusmak, Jana K Elwood
Alkaptonuria is a rare autosomal recessive metabolic disorder caused by deficiency of homogentisic acid (HGA) oxidase, the only enzyme capable of catabolizing HGA. Deficiency of this enzyme leads to excess HGA which deposits in the connective tissue. We present a case of a 64-year-old woman who was referred to the dermatology clinic for a full body mole check and skin cancer screening. Clinically she had blue/gray pigmentation of the external ear and sclera. Also she had a domed papule on the left cheek with punctate gray pigmentation which was biopsied...
August 2017: South Dakota Medicine: the Journal of the South Dakota State Medical Association
https://www.readbyqxmd.com/read/28812041/anthropometric-and-skeletal-parameters-predict-2-strand-semitendinosus-tendon-size-in-double-bundle-anterior-cruciate-ligament-reconstruction
#6
Daisuke Chiba, Eiichi Tsuda, Shizuka Sasaki, Xizhe Liu, Yasuyuki Ishibashi
BACKGROUND: Few studies have examined whether skeletal parameters predict hamstring graft size during anterior cruciate ligament reconstruction (ACLR). PURPOSE/HYPOTHESIS: The purpose of this study was to examine whether preoperative anthropometric and radiographic skeletal parameters could predict hamstring graft size during ACLR. We hypothesized that both anthropometric and skeletal parameters can be used to predict graft size in our double-bundle procedure and that the use of skeletal parameters will improve the accuracy of graft size prediction...
August 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28809791/imaging-collagen-in-scar-tissue-developments-in-second-harmonic-generation-microscopy-for-biomedical-applications
#7
REVIEW
Leila Mostaço-Guidolin, Nicole L Rosin, Tillie-Louise Hackett
The ability to respond to injury with tissue repair is a fundamental property of all multicellular organisms. The extracellular matrix (ECM), composed of fibrillar collagens as well as a number of other components is dis-regulated during repair in many organs. In many tissues, scaring results when the balance is lost between ECM synthesis and degradation. Investigating what disrupts this balance and what effect this can have on tissue function remains an active area of research. Recent advances in the imaging of fibrillar collagen using second harmonic generation (SHG) imaging have proven useful in enhancing our understanding of the supramolecular changes that occur during scar formation and disease progression...
August 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28809705/effects-of-continuous-kinaesthetic-feedback-based-on-tendon-vibration-on-motor-imagery-bci-performance
#8
M Barsotti, D Leonardis, N Vanello, M Bergamasco, A Frisoli
BACKGROUND AND OBJECTIVES: Feedback plays a crucial role for using Brain Computer Interface (BCI) systems. This study proposes the use of vibration-evoked kinaesthetic illusions as part of a novel multisensory feedback for a Motor Imagery (MI) based BCI and investigates its contributions in terms of BCI performance and electroencephalographic (EEG) correlates. METHODS: Sixteen subjects performed two different right arm MI-BCI sessions: with the visual feedback only and with both visual and vibration-evoked kinaesthetic feedback, conveyed by the stimulation of the biceps brachi tendon...
August 14, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28809638/-four-corner-arthrodesis-of-the-wrist-with-dorsal-circular-plate-a-retrospective-monocentric-study
#9
T Zatrapa, D Veigl, J Pech, I Landor, M Šimková
PURPOSE OF THE STUDY Our study aimed to evaluate a group of patients who in the period from 2005 to 2014 underwent a four-corner arthrodesis of the wrist in our department. We also wanted to verify the hypothesis as to whether the use of conventional dorsal plate without the application of bone grafts leads to comparable results as the use of dorsal locking plates and routine application of bone grafts. MATERIAL AND METHODS Throughout the years 2005 to 2014 the four-corner arthrodesis of the wrist was performed in our department in a total of 62 patients, in two cases bilaterally...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28809627/-the-use-of-btb-allograft-in-revision-reconstruction-of-the-anterior-cruciate-ligament-and-its-success-rate-in-terms-of-subjective-patient-satisfaction
#10
J Sklenský, P Vališ, M Repko, M Rouchal, M Maršálek, D Hrůzová
PURPOSE OF THE STUDY A retrospective evaluation of the success rate of revision ACL reconstruction performed using BTB allograft in terms of the life expectancy of the procedure up to and over five years from surgery. MATERIAL AND METHODS Over a ten-year period, from 2003 to 2013, we performed 47 revision ACL reconstruction surgeries. The majority of the primary ACL reconstructions using BTB autografts were not performed at our site. The group observed included 16 women (34%) and 31 men (66%). The women were aged between 25 and 48 years, the median age being 32...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28808728/-subpectoral-tenodesis-of-the-long-head-of-the-biceps-tendon-with-an-interference-screw-and-a%C3%A2-cortical-button-clinical-and-cosmetic-results-after-1-year
#11
P-C Nolte, N Pister, F Holz, M Egenolf, T Chatterjee
BACKGROUND: Pathologies of the long head of biceps tendon (LHB) can cause anterior shoulder pain. Surgical treatment includes tenotomy and tenodesis (TD), however TD causes fewer cosmetic deformities and less cramping of the biceps muscle. To date, numerous techniques for TD have been described but the "gold standard" has not yet been established. OBJECTIVES: The purpose of this study is to evaluate the functional and cosmetic outcome following subpectoral biceps TD with an interference screw and a cortical-button (STLHB-IC) after 1 year...
August 14, 2017: Der Orthopäde
https://www.readbyqxmd.com/read/28808628/distal-radius-volar-rim-plate-technical-and-radiographic-considerations
#12
Michelle Spiteri, Darren Roberts, Wayne Ng, Jamie Matthews, Dominic Power
AIM: To determine technical considerations and radiographic outcomes of the Synthes volar rim distal radius plate to treat complex intra-articular fractures. METHODS: This review highlights technical considerations learnt using this implant since it was introduced in a major trauma unit in November 2011, including anatomical reduction and whether this was maintained radiographically. RESULTS: Twenty-six of the 382 internally fixed distal radial fractures at our unit (6...
July 18, 2017: World Journal of Orthopedics
https://www.readbyqxmd.com/read/28808593/combined-bone-transportation-and-lengthening-techniques-for-the-treatment-of-septic-nonunion-of-the-forearm-followed-by-tendon-transfer
#13
Konstantinos Ditsios, Eirini Iosifidou, Lazaros Kostretzis, Panagiotis Konstantinou, Iosafat Pinto, Ioannis Theodoroudis, Ippokratis Hatzokos
Infected nonunion of a forearm fracture complicated by a considerable skin-muscle defect poses a great challenge to orthopaedic surgeons. The treatment strategy comprises eradication of the infection, ensuring bony union and soft tissue coverage along with functional restoration. We report a case of a 23-year-old man with an open Gustilo-Anderson IIIb fracture complicated by infected nonunion after internal fixation. After thorough surgical debridement, a considerable soft tissue defect, extensor muscle loss, and posterior interosseous nerve laceration had to be addressed...
2017: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/28808198/ultrasonographic-evaluation-of-enthesitis-in-patients-with-ankylosing-spondylitis
#14
Huayong Zhang, Jun Liang, Junlan Qiu, Fan Wang, Lingyun Sun
The aim of this study was to assess sensitivity and responsiveness of power Doppler ultrasound (PDUS) in detecting enthesitis for ankylosing spondylitis (AS) patients compared to clinical examinations. Twenty AS patients initiating etanerceptunderwent clinical and PDUS examinations of six bilateral entheseal sites at baseline and after 1, 2 and 3 months of treatment. Clinical and PDUS examinations identified at least one entheseal lesion in nine (45%) and 19 (95%) patients, respectively. Furthermore, of 240 entheseal sites examined in these 20 patients, PDUS detected 123 entheseal lesions (51...
January 19, 2017: Journal of Biomedical Research
https://www.readbyqxmd.com/read/28807935/function-of-the-hypobranchial-muscles-and-hyoidiomandibular-ligament-during-suction-capture-and-bite-processing-in-white-spotted-bamboo-sharks-chiloscyllium-plagiosum
#15
Jason B Ramsay, Cheryl D Wilga
Suction feeding in teleost fish is a power dependant behavior, requiring rapid and forceful expansion of the orobranchial cavity by the hypobranchial and trunk muscles. To increase power production for expansion, many species employ in-series tendons and catch mechanisms to store and release elastic strain energy. Suction feeding sharks such as Chiloscyllium plagiosum lack large in-series tendons on the hypobranchials, yet two of the hypobranchials, the coracohyoideus and coracoarcualis (CH, CA; hyoid depressors), are arranged in-series, and run deep and parallel to a third muscle, the coracomandibularis (CM, jaw depressor)...
August 14, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28807512/non-linear-finite-element-model-to-assess-the-effect-of-tendon-forces-on-the-foot-ankle-complex
#16
Enrique Morales-Orcajo, Thales R Souza, Javier Bayod, Estevam Barbosa de Las Casas
A three-dimensional foot finite element model with actual geometry and non-linear behavior of tendons is presented. The model is intended for analysis of the lower limb tendon forces effect in the inner foot structure. The geometry of the model was obtained from computational tomographies and magnetic resonance images. Tendon tissue was characterized with the first order Ogden material model based on experimental data from human foot tendons. Kinetic data was employed to set the load conditions. After model validation, a force sensitivity study of the five major foot extrinsic tendons was conducted to evaluate the function of each tendon...
August 11, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28807379/surgical-correction-of-haglund-s-triad-using-a-central-tendon-splitting-approach-a-retrospective-outcomes-study
#17
Zhan Xia, Andy Khye Soon Yew, Ting Karen Zhang, Hsien Ching David Su, Yung Chuan Sean Ng, Inderjeet Singh Rikhraj
We evaluated the surgical outcomes of Haglund's triad using a central tendon-splitting approach, with Achilles tendon partial detachment and debridement, excision of the retrocalcaneal bursa, resection of Haglund's prominence, and reattachment of the Achilles tendon. The medical records of 22 patients (22 heels) who had undergone surgical correction of Haglund's triad from January 2010 to December 2015 were reviewed retrospectively. The visual analog scale pain score, American Orthopaedic Foot and Ankle Society (AOFAS) Ankle-Hindfoot scale score, and 36-item Short-Form Health Survey physical and mental component scores were prospectively collected preoperatively, 6 months postoperatively, and at the last visit...
August 11, 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28807348/a-biomechanical-comparison-between-asymmetric-pennington-technique-and-conventional-core-suture-techniques-6-strand-flexor-tendon-repair
#18
Naoya Kozono, Takamitsu Okada, Naohide Takeuchi, Takeshi Shimoto, Hidehiko Higaki, Yasuharu Nakashima
PURPOSE: To evaluate the fatigue strength and gap sizes of the asymmetric Pennington technique compared with 2 conventional 6-strand core suture techniques: the triple-looped suture and the Yoshizu #1. METHODS: We recorded the fatigue strength (forces × cycles) and gap sizes of a 6-strand flexor tendon repair with different core suture techniques under cyclic loading in 30 porcine tendons. The asymmetric Pennington technique was performed with a Pennington repair of equal suture purchase in the 2 tendon stumps, with the 2 other Pennington repairs shifted by 3 mm, respectively, along the longitudinal axis of the tendon in relation to the first Pennington repair...
August 11, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28807213/turkey-model-for-flexor-tendon-research-in%C3%A2-vitro-comparison-of-human-canine-turkey-and-chicken-tendons
#19
Assaf Kadar, Andrew R Thoreson, Ramona L Reisdorf, Peter C Amadio, Steven L Moran, Chunfeng Zhao
BACKGROUND: Flexor tendon injuries are one of the most common hand injuries and remain clinically challenging for functional restoration. Canine and chicken have been the most commonly used animal models for flexor tendon-related research but possess several disadvantages. The purpose of this study was to explore a potential turkey model for flexor tendon research. METHODS: The third digit from human cadaveric hands, canine forepaws, turkey foot, and chicken foot were used for this study...
August 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28806833/-dynamic-correction-of-scapholunate-instability-using-an-ecrl-tendon-strip-and-a-free-pl-interponat
#20
Evelin Soleman, Lukas Fatzer, Tomas Sanchez
The present article describes our technique of correction of static reduceable scapholunate instability.
August 2017: Handchirurgie, Mikrochirurgie, Plastische Chirurgie
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