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https://www.readbyqxmd.com/read/28823036/muscular-responses-appear-to-be-associated-with-existence-of-kinesthetic-perception-during-combination-of-tendon-co-vibration-and-motor-imagery
#1
Eriko Shibata, Fuminari Kaneko, Masaki Katayose
The afferent inputs from peripheral sensory receptors and efferent signals from the central nervous system that underlie intentional movement can contribute to kinesthetic perception. Previous studies have revealed that tendon vibration to wrist muscles elicits an excitatory response-known as the antagonist vibratory response-in muscles antagonistic to the vibrated muscles. Therefore, the present study aimed to further investigate the effect of tendon vibration combined with motor imagery on kinesthetic perception and muscular activation...
August 19, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28820835/simultaneous-stiles-bunnell-tendon-transfer-enhances-intrinsic-function-of-the-second-toe-transplantations
#2
Yu-Te Lin, Charles Yuen Yung Loh, Shwu-Huei Lien, Chih-Hung Lin, Fu-Chan Wei
Claw finger is sequelae of fingers without intrinsic function. Claw toe deformity is common after toe transfers as simultaneous intrinsic reconstruction has yet to be reported in the literature. We present our experience of simultaneous tendon transfers during the second toe transplantation. Seven 2nd toe transfers were performed in 5 metacarpal-like and metacarpal hands. The Stiles-Bunnell tendon transfer was incorporated into toe transfers. Toe lumbrical tendons were repaired to the Flexor Digitorum Sublimis of the same recipient digit...
August 8, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28819342/bilateral-ruptures-of-the-extensor-mechanism-of-the-knee-a-systematic-review
#3
REVIEW
Lawrence Camarda, Antonio D'Arienzo, Salvatore Morello, Marco Guarneri, Francesco Balistreri, Michele D'Arienzo
INTRODUCTION: We conduct a systematic and qualitative review of the current literature to evaluate studies that described bilateral ruptures of the extensor mechanism of the knee. METHODS: A comprehensive literature search was performed to evaluate all studies included in the literature until September 2016. RESULTS: Fourteen studies with a total of 44 patients met the inclusion criteria. There were 14 patients with CRF (61%), 6 patients were affected by diabetes mellitus (14%) while other 6 patients were obese patients (14%)...
December 2017: Journal of Orthopaedics
https://www.readbyqxmd.com/read/28817976/an-open-source-model-and-solution-method-to-predict-co-contraction-in-the-finger
#4
Alexander R MacIntosh, Peter J Keir
A novel open-source biomechanical model of the index finger with an electromyography (EMG)-constrained static optimization solution method are developed with the goal of improving co-contraction estimates and providing means to assess tendon tension distribution through the finger. The Intrinsic model has four degrees of freedom and seven muscles (with a 14 component extensor mechanism). A novel plugin developed for the OpenSim modelling software applied the EMG-constrained static optimization solution method...
August 17, 2017: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/28817708/timing-and-extent-of-finger-force-enslaving-during-a-dynamic-force-task-cannot-be-explained-by-emg-activity-patterns
#5
Mojtaba Mirakhorlo, Huub Maas, DirkJan H E J Veeger
Finger enslaving is defined as the inability of the fingers to move or to produce force independently. Such finger enslaving has predominantly been investigated for isometric force tasks. The aim of this study was to assess whether the extent of force enslaving is dependent on relative finger movements. Ten right-handed subjects (22-30 years) flexed the index finger while counteracting constant resistance forces (4, 6 and 8 N) orthogonal to the fingertip. The other, non-instructed fingers were held in extension...
2017: PloS One
https://www.readbyqxmd.com/read/28817160/extensor-mechanism-reconstruction-for-chronic-patellar-fracture
#6
Antonio Cusano, Emily J Curry, Lee N Marinko, Xinning Li
Patients with displaced patellar fractures typically present with disruption to the extensor mechanism requiring acute surgical intervention. Chronic patellar fractures with disruption of the extensor mechanism are uncommon, and few surgical options are available. The authors present a patient who sustained a fracture to the inferior pole of the patella in Africa 5 years prior that was managed conservatively with bands and a brace. He decided to pursue surgical intervention because of difficulties with leg extension, weakness, and ambulation...
August 17, 2017: Orthopedics
https://www.readbyqxmd.com/read/28814004/biomimetic-finger-extension-mechanism-for-soft-wearable-hand-rehabilitation-devices
#7
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/28809638/-four-corner-arthrodesis-of-the-wrist-with-dorsal-circular-plate-a-retrospective-monocentric-study
#8
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/28808628/distal-radius-volar-rim-plate-technical-and-radiographic-considerations
#9
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
#10
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/28806831/clinical-sign-for-missed-decompression-of-a-separate-extensor-pollicis-brevis-compartment-in-de-quervain-s-disease
#11
Niels Benatar
Persistent pain despite previous surgery for de Quervain's disease might be due to an overlooked septum between the abductor pollicis longus tendon slips and the extensor pollicis brevis tendon, or an overlooked completely separate compartment for the extensor pollicis brevis tendon alone. In both of these instances, extension of the MP joint of the thumb against resistance elicits pain at the distal level of the first extensor compartment of the wrist. When this sign is positive, revisional surgery and decompression of the remaining septum or separate compartment is indicated...
August 2017: Handchirurgie, Mikrochirurgie, Plastische Chirurgie
https://www.readbyqxmd.com/read/28804760/autopsy-case-of-the-c12orf65-mutation-in-a-patient-with-signs-of-mitochondrial-dysfunction
#12
Hideaki Nishihara, Masatoshi Omoto, Masaki Takao, Yujiro Higuchi, Michiaki Koga, Motoharu Kawai, Hiroo Kawano, Eiji Ikeda, Hiroshi Takashima, Takashi Kanda
OBJECTIVE: To describe the autopsy case of a patient with a homozygous 2-base deletion, c171_172delGA (p.N58fs), in the C12orf65 gene. METHODS: We described the clinical history, neuroimaging data, neuropathology, and genetic analysis of the patients with C12orf65 mutations. RESULTS: The patient was a Japanese woman with a history of delayed psychomotor development, primary amenorrhea, and gait disturbance in her 20s. She was hospitalized because of respiratory failure at the age of 60...
August 2017: Neurology. Genetics
https://www.readbyqxmd.com/read/28794162/the-relative-compliance-of-energy-storing-tendons-may-be-due-to-the-helical-fibril-arrangement-of-their-fascicles
#13
Tom Shearer, Chavaunne T Thorpe, Hazel R C Screen
A nonlinear elastic microstructural model is used to investigate the relationship between structure and function in energy-storing and positional tendons. The model is used to fit mechanical tension test data from the equine common digital extensor tendon (CDET) and superficial digital flexor tendon (SDFT), which are used as archetypes of positional and energy-storing tendons, respectively. The fibril crimp and fascicle helix angles of the two tendon types are used as fitting parameters in the mathematical model to predict their values...
August 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28781212/tendon-transfer-to-restore-the-extension-of-the-thumb-using-the-extensor-carpi-radialis-brevis-a-long-term-follow-up
#14
Shusen Cui, Guang Yang, Qiang Li, Guangzhi Wu, Zhenxing Wang, Ju Zhang, Wei Yu
PURPOSE: The present study aimed to investigate the long-term functional and clinical outcomes of a tendon transfer to restore the extension of the thumb using the extensor carpi radialis brevis. METHODS AND MATERIALS: From June 2005 to September 2012, eight patients (six males; two females) with a mean age of 30 years (range, 16-52 years) who suffered rupture or division of extensor pollicis longus underwent a tendon transfer to restore the extension of the thumb using the extensor carpi radialis brevis...
July 18, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28777275/gait-deviations-in-children-with-osteogenesis-imperfecta-type-i
#15
Christina R Garman, Adam Graf, Joseph Krzak, Angela Caudill, Peter Smith, Gerald Harris
BACKGROUND: Osteogenesis imperfecta (OI) is a congenital connective tissue disorder often characterized by orthopaedic complications that impact normal gait. As such, mobility is of particular interest in the OI population as it is associated with multiple aspects of participation and quality of life. The purpose of the current study was to identify and describe common gait deviations in a large sample of individuals with type I OI and speculate the etiology with a goal of improving function...
August 2, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28774256/anatomical-variations-of-the-extensor-carpi-ulnaris-groove-a-new-computed-tomography-based-evaluation
#16
Sho Kohyama, Toshikazu Tanaka, Eriko Okano, Ochiai Naoyuki
BACKGROUND: This study aimed to develop a classification that precisely describes the extensor carpi ulnaris (ECU) groove morphology. METHODS: Reconstructed axial plane computed tomography scans of the wrists of 200 patients were reviewed. Three groups of groove shape were created based on the position of the deepest point: deviated to the ulnar side (Type U), in the middle of the groove (Type M), and deviated to the radial side (Type R). Groove depth, width, carrying angle, and radius of the curvature were measured using the Picture Archiving and Communication System in a slice in which the ulnar head was the largest...
September 2017: Journal of Hand Surgery Asian-Pacific Volume
https://www.readbyqxmd.com/read/28774251/dorsal-and-volar-surgical-approaches-to-the-metacarpophalangeal-joint-a-comparative-anatomic-study
#17
Eitan Melamed, Nicholas Calotta, Ricardo Bello, Richard M Hinds, John T Capo, Scott Lifchez
BACKGROUND: We compared 3 surgical approaches to the MP joint: a dorsal extensor tendon-splitting approach, a dorsal extensor tendon-reflecting parasagittal approach, and the volar A1 pulley approach. We quantitatively compared each of these approaches by measuring the amount of articular cartilage exposed on the base of the proximal phalanx. We hypothesize that visualization of the articular cartilage of the proximal phalangeal base is enhanced with the volar approach. METHODS: The MP joints of the 32 available digits were randomly assigned to 1 of 3 surgical approaches: extensor tendon splitting (A), extensor tendon reflecting (B), or volar approach (C)...
September 2017: Journal of Hand Surgery Asian-Pacific Volume
https://www.readbyqxmd.com/read/28774247/severe-destructive-tendinopathy-in-the-wrist-due-to-dialysis-related-amyloidosis
#18
Dongmin Kim, In Cheul Choi, Jong Woong Park
Dialysis-related amyloidosis (DRA) is a specific subtype of amyloidosis with several clinical presentations. Herein we report a case of severe destructive tendinopathy around the wrist associated with long-standing hemodialysis (HD). A 63-year-old female patient who had been on regular HD for 23 years suffered from symptoms of pain and a palpable mass around the wrist. Magnetic resonance imaging showed an ill-defined soft tissue mass around the extensor tendons that partially invaded the wrist joint. We performed surgical excision and tenolysis for the mass...
September 2017: Journal of Hand Surgery Asian-Pacific Volume
https://www.readbyqxmd.com/read/28765477/triggering-of-the-abductor-pollicis-longus-in-association-with-dequervain-s-tenosynovitis
#19
Dustin Adam Greenhill, Joseph J Thoder, Hesham Abdelfattah
DeQuervain's tenosynovitis is a common cause of radial-sided wrist pain. Symptoms result from a narrow first dorsal compartment and associated tendinosis of the enclosed extensor pollicis brevis and/or abductor pollicis longus (APL). Surgical intervention, offered when conservative measures fail to adequately relieve symptoms, requires a detailed understanding of potentially aberrant anatomy in order to avoid persistence or recurrence of symptoms. We describe a case whereby the patient presented with complaints of thumb triggering in extension and associated disabling first dorsal compartment tendinosis...
July 31, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28762016/ica-based-muscle-tendon-units-localization-and-activation-analysis-during-dynamic-motion-tasks
#20
Xiang Chen, Shaoping Wang, Chengjun Huang, Shuai Cao, Xu Zhang
This study proposed an independent component analysis (ICA)-based framework for localization and activation level analysis of muscle-tendon units (MTUs) within skeletal muscles during dynamic motion. The gastrocnemius muscle and extensor digitorum communis were selected as target muscles. High-density electrode arrays were used to record surface electromyographic (sEMG) data of the targeted muscles during dynamic motion tasks. First, the ICA algorithm was used to decompose multi-channel sEMG data into a weight coefficient matrix and a source matrix...
July 18, 2017: Medical & Biological Engineering & Computing
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