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Flexor tendon

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https://www.readbyqxmd.com/read/28094764/neuromorphic-meets-neuromechanics-part-ii-the-role-of-fusimotor-drive
#1
Kian Jalaleddini, Chuanxin Niu, Suraj Chakravarthi Raja, Won Joon Sohn, Gerald Loeb, Terence Sanger, Francisco Valero-Cuevas
OBJECTIVE: We studied the fundamentals of muscle afferentation by building a neuro-mechano-morphic system actuating a cadaveric finger. This system is a faithful implementation of the stretch reflex circuitry. It allowed the systematic exploration of the effects of different fusimotor drives to the muscle spindle on the closed-loop stretch reflex response. APPROACH: As in Part I of this work, sensory neurons conveyed proprioceptive information from muscle spindles (with static and dynamic fusimotor drive) to populations of ��-motor neurons (with recruitment and rate coding properties)...
January 17, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28092337/anatomical-basis-and-clinical-application-of-synovial-flaps-in-the-wrist-and-distal-forearm
#2
David L Colen, Jiun-Ting Yeh, Lawrence B Colen
Neuropathic symptoms after median nerve repair at the wrist or secondary to refractory carpal tunnel syndrome may become debilitating. These symptoms develop due to perineural adhesions, intraneural fibrosis and fixation of the nerve to the transverse carpal ligament after surgery and often require neurolysis. Interposition of vascularized soft tissue over the median nerve at the time of neurolysis prevents recurrence of such adhesions. The synovial flap, fashioned from the synovial lining of the flexor tendon sheath, is an ideal tissue for this purpose...
January 12, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28089807/ultrasonography-detects-ulnar-nerve-dislocation-despite-normal-electrophysiology-and-magnetic-resonance-imaging
#3
Jared M Pisapia, Zarina S Ali, Eric D Hudgins, Viviane Khoury, Gregory G Heuer, Eric L Zager
BACKGROUND: Dislocation of the ulnar nerve (UN) occurs in a subset of patients with ulnar neuropathy. Electrodiagnostic and magnetic resonance imaging (MRI) studies are performed to support the clinical diagnosis. We report the case of a patient with ulnar neuropathy with normal electrodiagnostic and MRI studies but with ultrasound (US) showing UN dislocation, which prompted successful treatment by UN submuscular transposition. CASE DESCRIPTION: A healthy 15 year-old female softball player presented with right medial elbow pain and paresthesias of the fourth and fifth digits...
January 12, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28078364/-ligament-injuries-of-fingers-and-thumbs
#4
R Schmitt
Degenerative and traumatic ligament lesions of the carpometacarpal joints frequently occur at the thumb ray, whereas the carpometacarpal amphiarthrosis of other finger rays are rarely affected. The metacarpophalangeal and interphalangeal joints of the thumb and fingers are stabilized by bilaterally running collateral ligaments and palmar plates. At the base of the metacarpophalangeal joints, several ligaments of the extensor hoods guide the extensor tendons and coordinate the fine motoric skills of phalangeal flexing and extending...
January 11, 2017: Der Radiologe
https://www.readbyqxmd.com/read/28074263/treatment-options-and-outcome-after-bony-avulsion-of-the-flexor-digitorum-profundus-tendon-a-review-of-29-cases
#5
Gabriel Halát, Lukas Negrin, Jochen Erhart, Robin Ristl, Stefan Hajdu, Patrick Platzer
INTRODUCTION: The objective of this retrospective review was to evaluate the functional and esthetic outcomes in patients with non- or minimally (<2 mm), and severely (>2 mm) displaced bony avulsions of the flexor digitorum profundus (FDP) tendon. MATERIALS AND METHODS: Between 1996 and 2010, 29 patients with a bony avulsion of the FDP tendon were treated. The displacement magnitude of the avulsed fragment determined, whether conservative or surgical treatment was performed...
January 10, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28072735/localized-type-volkmann-s-contracture-treated-with-tendon-transfer-and-tension-reduced-early-mobilization-a-case-report
#6
Yoshio Kaji, Osamu Nakamura, Konosuke Yamaguchi, Sachiko Tobiume, Tetsuji Yamamoto
RATIONALE: For localized type Volkmann's contracture, in which degeneration of the flexor digitorum profundus (FDP) muscle to one or two fingers and restriction of finger extension occur, dissection or excision of the affected muscle is usually recommended. However, these surgical procedures need relatively wide exposure of the muscle, because the FDP muscle is in the deep portion of the forearm. PATIENT CONCERNS: In this report, the case of a 35-year-old woman with localized type Volkmann's contracture is presented...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28070593/-morphological-investigations-of-deep-sole-ulcers-in-cattle-part-1-the-complicated-rusterholz-ulcer
#7
Susanne Gehringer, Matthias Müller, Johann Maierl
OBJECTIVE: In the context of a larger study on morphological changes of deep sole ulcers, claws with Rusterholz ulcer (RU) were investigated to describe the varied pathological changes of the RU. MATERIAL AND METHODS: Hind limbs of 55 cows displaying external signs of complicated sole ulcers were examined externally and internally. To examine the samples internally, a sagittal section was performed. Furthermore, the material was examined histologically and after bone maceration...
January 10, 2017: Tierärztliche Praxis. Ausgabe G, Grosstiere/Nutztiere
https://www.readbyqxmd.com/read/28067854/quantitative-assessment-of-first-annular-pulley-and-adjacent-tissues-using-high-frequency-ultrasound
#8
Yi-Hsun Lin, Tai-Hua Yang, Shyh-Hau Wang, Fong-Chin Su
Due to a lack of appropriate image resolution, most ultrasound scanners are unable to sensitively discern the pulley tissues. To extensively investigate the properties of the A1 pulley system and the surrounding tissues for assessing trigger finger, a 30 MHz ultrasound system was implemented to perform in vitro experiments using the hypodermis, A1 pulley, and superficial digital flexor tendon (SDFT) dissected from cadavers. Ultrasound signals were acquired from both the transverse and sagittal planes of each tissue sample...
January 7, 2017: Sensors
https://www.readbyqxmd.com/read/28050355/a-rare-case-of-anomalous-origin-of-first-lumbrical-from-the-tendon-of-flexor-digitorum-superficialis-to-index-finger
#9
S Trivedi, B C Satapathy, M Rathore, M B Sinha
Human hand is involved in variety of precision work which requires a combined effort of forearm muscles as well as intrinsic muscles of hand. Lumbricals along with interossei muscles connect the tendons of flexor and extensor muscles and thus play a key role in the characteristic movements of human hands. Lumbricals originate from long flexor tendon and is inserted into dorsal digital expansion. Any variation in the attachment of these muscles can lead to deviation from the normal actions of the fingers and their proximal extension into carpal tunnel and might lead to carpal tunnel syndrome...
November 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28042226/cell-and-biologic-based-treatment-of-flexor-tendon-injuries
#10
Stephen W Linderman, Richard H Gelberman, Stavros Thomopoulos, Hua Shen
The two primary factors leading to poor clinical results after intrasynovial tendon repair are adhesion formation within the digital sheath and repair-site elongation and rupture. As the outcomes following modern tendon multi-strand repair and controlled rehabilitation techniques are often unsatisfactory, alternative approaches, such as the application of growth factors and mesenchymal stem cells (MSCs), have become increasingly attractive treatment options. Successful biological therapies require carefully controlled spatiotemporal delivery of cells, growth factors, and biocompatible scaffold matrices in order to simultaneously (1) promote matrix synthesis at the tendon repair site leading to increased biomechanical strength and stiffness and (2) suppress matrix synthesis along the tendon surface and synovial sheath preventing adhesion formation...
September 2016: Operative Techniques in Orthopaedics
https://www.readbyqxmd.com/read/28031505/z-plasty-of-the-flexor-hallucis-longus-tendon-at-tarsal-tunnel-for-checkrein-deformity
#11
Jae Hoon Lee, Young Jun Kim, Jong Hun Baek, Dong Hee Kim
PURPOSES: To review the outcome of Z-plasty of the flexor hallucis longus (FHL) tendon at the tarsal tunnel for checkrein deformity in 8 patients. METHODS: Records of 6 males and 2 females aged 14 to 67 (mean, 39.5) years who underwent Z-plasty (lengthening) of the FHL tendon at the tarsal tunnel for checkrein deformity in the first and second toes by a single surgeon were reviewed. All patients had undergone 3 months of conservative treatment. The mean time from injury to surgical treatment was 8...
December 2016: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28027238/free-functioning-gracilis-muscle-transfer-for-elbow-flexion-reconstruction-after-traumatic-adult-brachial-pan-plexus-injury-where-is-the-optimal-distal-tendon-attachment-for-elbow-flexion
#12
Andrés A Maldonado, Santiago Romero-Brufau, Michelle F Kircher, Robert J Spinner, Allen T Bishop, Alexander Y Shin
BACKGROUND: Reconstruction after pan-plexus root avulsions often includes gracilis free functioning muscle transfer. For elbow flexion reconstruction, the free functioning muscle transfer distal tendon is inserted into the biceps tendon or more distally (i.e., flexor digitorum profundus/flexor pollicis longus tendons) for combined elbow and finger flexion; the theoretical drawback of the latter approach is weaker elbow flexion. The authors compared elbow flexion strength with a biceps tendon versus a flexor digitorum profundus/flexor pollicis longus tendon attachment to determine which insertion point resulted in better elbow flexion...
January 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28026732/-spontaneous-tendon-ruptures-in-the-rheumatoid-hand
#13
J Pech, D Veigl, M Vlček
A spontaneous tendon rupture is a direct consequence of rheumatoid inflammation and can appear without any noticeable impact, often during sleep. The patient then presents with inability to flex or extend metacarpophalageal or interphalangeal joints. Multiple ruptures resulting in impaired function of several fingers can also occur and markedly limit the hand's grip strength. A tear may arise from either mechanical injury to the tendon along its course over bone or connective tissues, or by biochemical action of lysosomal enzymes, released during the inflammation process, on the connective tissue of the tendon...
2016: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28024855/current-limitations-in-control-of-viral-arthritis-and-tenosynovitis-caused-by-avian-reoviruses-in-commercial-poultry
#14
Holly S Sellers
Avian reoviruses are the causative agent of viral arthritis/tenosynovitis in chickens and turkeys. Clinical signs of disease include swelling of the hock joints accompanied by lesions in the gastrocnemius and digital flexor tendons causing lameness in addition to hydropericardium. The economic impact is significant as it results in poor weight gain, increased feed conversion ratios and condemnations at the processing plant. Vaccination with both live attenuated and inactivated oil emulsion vaccines have been used successfully for decades to control the disease...
December 13, 2016: Veterinary Microbiology
https://www.readbyqxmd.com/read/28018057/treatment-and-postsurgery-functional-outcome-of-spaghetti-wrist
#15
Hamed Yazdanshenas, Alireza Fadaee Naeeni, Anousheh Ashouri, Eleby R Washington, Arya Nick Shamie, Kodi Azari
Background The outcomes of treating severe wrist injuries are not well understood and despite their complexity and prevalence, particularly among young adults, spaghetti wrist is rarely investigated. The aim of this study is to evaluate the postsurgery, functional outcome of spaghetti wrist injuries. Material and Methods In this prospective cross-sectional study, 153 patients with spaghetti wrist injuries were followed up for approximately 20 months and were assessed regarding returning to work and postsurgical functional outcomes that included tendon functionality, opposition, intrinsic function, deformity, sensation, and grip strength...
December 2016: Journal of Hand and Microsurgery
https://www.readbyqxmd.com/read/28006718/trigger-wrist-and-carpal-tunnel-syndrome-caused-by-a-flexor-tendon-related-ganglion-in-a-teenager-a-case-report
#16
Mohammad M Al-Qattan, Nourhan A Elshamma, Almaha Alqabbani
INTRODUCTION: Trigger wrist is a rare entity and is usually seen in adults. Trigger wrist in children and teenagers is extremely rare. PRESENTATION OF CASE: A case of Trigger wrist and carpal tunnel syndrome in a 16-year-old male is reported. Surgical exploration revealed a ganglion related to the flexor superficialis tendon. After surgical excision, there was complete resolution of symptoms. DISCUSSION: This is a very rare case and there are no similar cases in the literature...
November 29, 2016: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28005235/examination-of-the-applicability-of-the-disabilities-of-the-arm-shoulder-and-hand-dash-questionnaire-to-patients-with-hand-injuries-and-diseases-using-rasch-analysis
#17
Kathrin Braitmayer, Caroline Dereskewitz, Cornelia Oberhauser, Klaus-Dieter Rudolf, Michaela Coenen
BACKGROUND: The Disabilities of the Arm, Shoulder and Hand (DASH) Questionnaire is the most commonly applied patient-reported outcome measure used to assess disability and functioning in clinical research and practice for patients with injuries and diseases of the upper extremities. The objective of this study was to assess whether the DASH is a valid and reliable questionnaire to measure disability and functioning in patients with hand injuries and diseases using Rasch analysis. METHODS: We performed a psychometric study using data derived from two multicentre studies carried out to develop the International Classification of Functioning, Disability and Health (ICF) Core Sets for Hand Conditions...
December 22, 2016: Patient
https://www.readbyqxmd.com/read/28004174/altered-patterns-of-displacement-within-the-achilles-tendon-following-surgical-repair
#18
Åsa Fröberg, Ann-Sophie Cissé, Matilda Larsson, Mattias Mårtensson, Michael Peolsson, Tomas Movin, Anton Arndt
PURPOSE: Ultrasound speckle tracking was used to compare tendon deformation patterns between uninjured and surgically repaired Achilles tendons at 14-27-month follow-up. The hypothesis was that the non-homogenous displacement pattern previously described in uninjured tendons, where displacement within deep layers of the tendons exceeds that of superficial layers, is altered following tendon rupture and subsequent surgical repair. METHODS: In the first part of this study, an in-house-developed block-matching speckle tracking algorithm was evaluated for assessment of displacement on porcine flexor digitorum tendons...
December 21, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/27992779/achilles-tendon-morphology-plantar-flexors-torque-and-passive-ankle-stiffness-in-spastic-hemiparetic-stroke-survivors
#19
Bruno Freire, Caroline Pieta Dias, Natália Batista Albuquerque Goulart, Camila Dias de Castro, Jefferson Becker, Irênio Gomes, Marco Aurélio Vaz
BACKGROUND: The present study compared the Achilles tendon morphological characteristics, plantar flexor toque and passive ankle stiffness between hemiparetic spastic stroke survivors and healthy subjects. METHODS: The Achilles tendon length was measured at the affected and contralateral limbs of twelve hemiparetic stroke survivors with ankle spasticity and twelve healthy subjects. The ankle was held at three different angles (20° plantar flexion, 0° and maximum dorsiflexion) while an ultrasound system was used to capture images from the Achilles tendon...
December 12, 2016: Clinical Biomechanics
https://www.readbyqxmd.com/read/27992239/differential-effects-of-two-rehabilitation-programs-following-anterior-cruciate-ligament-reconstruction
#20
Igor Setuain, Mikel Izquierdo, Fernando Idoate, Eder Bikandi, Esteban M Gorostiaga, Per Aagaard, Eduardo L Cadore, Jesús Alfaro-Adrián
Context- The muscular function restoration related to the type of physical rehabilitation followed after anterior cruciate ligament reconstruction (ACLR) using autologous hamstring tendon graft in terms of strength and cross sectional area (CSA) remain controversial. Objective- To analyze the CSA and force output of quadriceps and hamstring muscles in subjects following either an Objective Criteria-Based rehabilitation (OCBR) algorithm or the usual care (UCR) for ACL rehabilitation in Spain, before and one year after undergoing an ACLR...
December 19, 2016: Journal of Sport Rehabilitation
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