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https://www.readbyqxmd.com/read/29147730/on-the-skilled-plantar-flexor-motor-action-and-unique-electromyographic-activity-of-ballet-dancers
#1
Sakiko Saito, Hiroki Obata, Mayumi Kuno-Mizumura, Kimitaka Nakazawa
The study aimed to compare the ability of dance and non-dance subjects to perform fine control of a simple heel-raising/lowering movement, and to determine if there are any differences in motor unit activity in the primary plantar flexor muscles during the movement. Subjects were instructed to accurately track a sinusoidal trace with a heel-raising and lowering movement at four controlled frequencies (1, 0.5, 0.25, and 0.125 Hz). The ankle joint angle was used to characterize movement errors from the target...
November 16, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29145979/current-ultrasound-application-in-the-foot-and-ankle
#2
REVIEW
Nahum Michael Beard, Robert Patrick Gousse
This article is a comprehensive review of the current utilizations of ultrasound in the treatment of orthopedic conditions of the foot and ankle. It reviews the diagnostic and interventional applications to commonly encountered lower-extremity ailments, including plantar fasciosis, tendinosis, and peripheral nerve disorders. It also outlines minimally invasive ultrasound-guided procedures and emerging therapies as alternatives to current treatments. These emerging therapies can be used to assist surgeons and provide options for patients needing intervention...
January 2018: Orthopedic Clinics of North America
https://www.readbyqxmd.com/read/29145309/short-term-effects-of-sports-taping-on-navicular-height-navicular-drop-and-peak-plantar-pressure-in-healthy-elite-athletes-a-within-subject-comparison
#3
Taegyu Kim, Jong-Chul Park
Medial tibial stress syndrome (MTSS) is one of the most common exercise-induced leg pain. The navicular drop (ND) was identified as a risk factor for MTSS. This study aimed to evaluate the short-term effects of sports taping applied to the supporting lower leg during sitting, standing, walking, and jogging to restrict the ND in healthy elite athletes.Twenty-four healthy elite athletes without a history of exercise-induced pain or injuries in the lower limbs participated in this study (median age: 21.00 years; 1st--3rd quartiles; 19...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29144991/finite-element-simulation-on-posterior-tibial-tendinopathy-load-transfer-alteration-and-implications-to-the-onset-of-pes-planus
#4
Duo Wai-Chi Wong, Yan Wang, Aaron Kam-Lun Leung, Ming Yang, Ming Zhang
BACKGROUND: Posterior tibial tendinopathy is a challenging foot condition resulting in pes planus, which is difficult to diagnose in the early stage. Prior to the deformity, abnormal internal load transfer and soft tissue attenuation are anticipated. The objective of this study was to investigate the internal load transfer and strain of the ligaments with posterior tibial tendinopathy, and the implications to pes planus and other deformities. METHODS: A three-dimensional finite element model of the foot and ankle was reconstructed from magnetic resonance images of a 28-year-old normal female...
November 3, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/29141811/do-gait-patterns-differ-in-men-and-women-with-multiple-sclerosis
#5
Massimiliano Pau, Federica Corona, Giuseppina Pilloni, Micaela Porta, Giancarlo Coghe, Eleonora Cocco
BACKGROUND: Multiple Sclerosis (MS) affects men and women differently from several points of view: prevalence, severity of cognitive impairments and disability accumulation. However, it is unknown whether ambulatory dysfunctions are sex-related. This study investigated the existence of differences in spatio-temporal and kinematic parameters of gait in men and women with MS using 3D gait analysis. METHODS: Gait patterns of 60 people with MS (pwMS, 32F, 28M) with low to moderate disability (average Expanded Disability Status Scale score 3, range 1-5...
November 2017: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/29140194/validity-of-a-smartphone-application-for-measuring-ankle-plantar-flexion
#6
Robert W Cox, Rodrigo E Martinez, Russell T Baker, Lindsay W Larkins
CONTEXT: Range of motion (ROM) is a component of a physical exam used in the diagnostic and rehabilitative process. Following ankle injury and/or during research, it is common to measure plantarflexion with a universal goniometer. The ease and availability of digital inclinometers created as applications for smartphones, has led to an increase in using this method of ROM assessment. Smartphone applications have been validated as alternatives to inclinometer measurements in the knee; however, this application has not been validated for plantarflexion in the ankle...
November 15, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/29139316/association-of-gastrocnemius-muscle-stiffness-with-passive-ankle-joint-stiffness-and-sex-related-difference-in-the-joint-stiffness
#7
Kintaro Chino, Hideyuki Takashi
Passive ankle joint stiffness is affected by all structures located within and over the joint, and is greater in men than in women. Localized muscle stiffness can be assessed by ultrasound shear wave elastography, and muscle architecture such as fascicle length and pennation angle can be measured by B-mode ultrasonography. Thus, we assessed localized muscle stiffness of the medial gastrocnemius (MG) with consideration of individual variability in the muscle architecture, and examined the association of the muscle stiffness with passive ankle joint stiffness and the sex-related difference in the joint stiffness...
November 15, 2017: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29139051/subject-specific-finite-element-modelling-of-the-human-foot-complex-during-walking-sensitivity-analysis-of-material-properties-boundary-and-loading-conditions
#8
Mohammad Akrami, Zhihui Qian, Zhemin Zou, David Howard, Chris J Nester, Lei Ren
The objective of this study was to develop and validate a subject-specific framework for modelling the human foot. This was achieved by integrating medical image-based finite element modelling, individualised multi-body musculoskeletal modelling and 3D gait measurements. A 3D ankle-foot finite element model comprising all major foot structures was constructed based on MRI of one individual. A multi-body musculoskeletal model and 3D gait measurements for the same subject were used to define loading and boundary conditions...
November 14, 2017: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/29137568/first-dorsal-metatarsal-artery-perforator-flap-to-cover-great-toe-defect
#9
Roongsak Limthongthang, Perajit Eamsobhana
BACKGROUND: There were very few options available for distal foot and toe defects that required a vascularized flap for coverage. As such, the use of a free flap was often justified in this region of the foot. The use of perforator flaps has created a new subset of local tissue transfer alternatives that increases the potential that the difficulties associated with microvascular tissue transfers could be avoided. The first dorsal metatarsal artery (FDMA) perforator flap was one variant of this new type of tissue transfer...
September 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/29137566/a-novel-exercise-device-for-venous-thromboembolism-prophylaxis-improves-venous-flow-in-bed-versus-ankle-movement-exercises-in-healthy-volunteers
#10
Yukiyo Shimizu, Hiroshi Kamada, Masataka Sakane, Shizu Aikawa, Hirotaka Mutsuzaki, Kenta Tanaka, Hajime Mishima, Akihiro Kanamori, Tomofumi Nishino, Naoyuki Ochiai, Masashi Yamazaki
PURPOSE: Venous thromboembolism prophylaxis is crucial. To facilitate active ankle movement in postoperative and bedridden patients, we developed a novel leg exercise apparatus (LEX). We investigated the effect of the LEX by comparing increases in lower extremity venous flow during different modes of exercise using the LEX. METHODS: In eight healthy participants, we measured venous flow volume and velocity in the femoral vein using duplex ultrasonography at 1, 10, 20, and 30 min after completing three modes of 1-min LEX exercises...
September 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/29136303/chromosome-9-mutations-reported-absent-in-some-patients-with-basal-cell-carcinoma-nevus-syndrome
#11
S Shih, B A Urso, R Domozych, K M Updyke, A I Laughlin, J A Solomon
Basal Cell Carcinoma Nevus Syndrome (BCCNS), also known as Gorlin syndrome, is a rare autosomal dominant condition with a substantial disease burden, thought to occur secondary to chromosome 9 mutation evoking a Hedgehog (Hh) signaling aberration that leads to early development of numerous basal cell carcinomas (BCCs). Individuals with BCCNS also present with keratocystic odontogenic tumors, medulloblastomas, and palmar or plantar pits1. This condition demonstrates variable expressivity, leading to differing phenotypes, even within the same family2...
November 14, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/29135586/increased-hyperalgesia-and-proinflammatory-cytokines-in-the-spinal-cord-and-dorsal-root-ganglion-after-surgery-and-or-fentanyl-administration-in-rats
#12
Lu Chang, Fang Ye, Quehua Luo, Yuanxiang Tao, Haihua Shu
BACKGROUND: Perioperative fentanyl has been reported to induce hyperalgesia and increase postoperative pain. In this study, we tried to investigate behavioral hyperalgesia, the expression of proinflammatory cytokines, such as interleukin-1β (IL-1β), interleukin-6 (IL-6), and tumor necrosis factor-α (TNF-α), and the activation of microglia in the spinal cord and dorsal root ganglion (DRG) in a rat model of surgical plantar incision with or without perioperative fentanyl. METHODS: Four groups of rats (n = 32 for each group) were subcutaneously injected with fentanyl at 60 μg/kg or normal saline for 4 times with 15-minute intervals...
November 10, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29133920/energy-neutral-the-human-foot-and-ankle-subsections-combine-to-produce-near-zero-net-mechanical-work-during-walking
#13
Kota Z Takahashi, Kate Worster, Dustin A Bruening
The human foot and ankle system is equipped with structures that can produce mechanical work through elastic (e.g., Achilles tendon, plantar fascia) or viscoelastic (e.g., heel pad) mechanisms, or by active muscle contractions. Yet, quantifying the work distribution among various subsections of the foot and ankle can be difficult, in large part due to a lack of objective methods for partitioning the forces acting underneath the stance foot. In this study, we deconstructed the mechanical work production during barefoot walking in a segment-by-segment manner (hallux, forefoot, hindfoot, and shank)...
November 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29133711/an-unusual-case-of-acute-encephalitic-syndrome-is-it-acute-measles-encephalitis-or-subacute-sclerosing-panencephalitis
#14
Ravindra K Garg, Hardeep S Malhotra, Imran Rizvi, Neeraj Kumar, Amita Jain
Subacute sclerosing panencephalitis is a late complication of measles infection and develops usually 6 to 15 years after the primary measles infection. Fulminant subacute sclerosing panencephalitis is an infrequently encountered form wherein the disease rapidly progresses to death. A six-year old male child presented with fever, abnormal movements of the left side of body followed by weakness of the left side of the body, and involuntary abnormal movements of right upper and lower limbs. On examination, he was drowsy and was unable to communicate...
November 2017: Neurology India
https://www.readbyqxmd.com/read/29128666/comparison-of-plantar-pressure-distribution-in-cad-cam-and-prefabricated-foot-orthoses-in-patients-with-flexible-flatfeet
#15
Banafsheh Khodaei, Hassan Saeedi, Maryam Jalali, Maede Farzadi, Ehsan Norouzi
BACKGROUNDS: The effect of foot orthoses on plantar pressure distribution has been proven by researchers but there are some controversies about advantages of custom-made foot orthoses to less expensive prefabricated foot orthoses. METHODS: Nineteen flatfeet adults between 18 and 45 participated in this study. CAD-CAM foot orthoses were made for these patients according to their foot scan. Prefabricated foot orthoses were prepared according to their foot size. Plantar pressure, force and contact area were measured using pedar(®)-x in-shoe system wearing shoe alone, wearing CAD-CAM foot orthoses and wearing prefabricated foot orthoses...
July 13, 2017: Foot
https://www.readbyqxmd.com/read/29126270/neural-plasticity-with-age-unilateral-maximal-strength-training-augments-efferent-neural-drive-to-the-contralateral-limb-in-older-adults
#16
Tiril Tøien, Runar Unhjem, Thomas Storehaug Øren, Ann Charlotte Gjertsen Kvellestad, Jan Hoff, Eivind Wang
Efferent neural drive during strong muscle contractions is attenuated with age, even after lifelong strength training. However, it is unknown if this deterioration may impede contralateral neural plasticity, and limit the clinical value of unilateral strength training. We assessed muscle force-generating capacity, evoked potentials recordings (V-wave and H-reflex normalized to M-wave; V/M-ratio and H/M-ratio) and voluntary activation (VA) in the plantar flexors of the contralateral limb following unilateral maximal strength training (MST) with the dominant limb for three weeks (9 sessions)...
November 4, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/29126045/the-effectiveness-of-conservative-non-pharmacological-treatment-of-plantar-heel-pain-a-systematic-review-with-meta-analysis
#17
REVIEW
Stefano Salvioli, Maddalena Guidi, Giulia Marcotulli
Plantar heel pain is one of the most common causes of pain and musculoskeletal pathologies of the foot. The aim of this systematic review was to identify the most effective, conservative and non-pharmacological treatments regarding pain in patients with plantar heel pain. The authors searched 5 databases and included only randomized control trials which investigated the efficacy of a conservative non-pharmacological treatment compared to the placebo, for the outcome of pain. Study selection, data collection and risk of bias assessment were conducted independently by two authors, and consensus was reached with a third author...
June 15, 2017: Foot
https://www.readbyqxmd.com/read/29126041/the-effect-of-eliminating-leg-length-difference-on-plantar-foot-pressure-distribution-in-patients-wearing-forefoot-offloading-shoe
#18
Ezequiel Palmanovich, Moshe Ayalon, David Ben Sira, Meir Nyska, Iftach Hetsroni
BACKGROUND AND PURPOSE: Elevated heel construction offloads the forefoot after surgery. However, side-to-side height difference alters limb kinetics, whereas leg-length equalizing-sole at non-operated side may have beneficial effects on foot loading. The purpose of this study was to characterize leg-length equalizing sole effect on bilateral plantar pressures when using heel-lift forefoot-offloading shoe. MATERIALS AND METHODS: Twenty men were tested walking. Plantar peak pressures (PP) and pressure-time integrals (PTI) in the forefoot-offloading shoe and in contralateral running shoe were compared between two conditions: one with- and the other without leg-length equalizing sole elevation at the running shoe...
October 24, 2017: Foot
https://www.readbyqxmd.com/read/29126039/the-resistance-to-failure-of-spring-ligament-reconstruction
#19
Chandra Pasapula, Adam Devany, Nicole C Fischer, Coen A Wijdicks, Tim Hübner, Franziska Reifenscneider, Sajid Shariff
INTRODUCTION: The spring ligament (SL) is increasingly recognised as the major structure that fails in acquired adult flatfoot deformity (AAFD). This is the first study that demonstrates integrity of repair of the SL. PATIENTS AND METHODS: Six pairs of fresh frozen cadavers were setup in a standardised fashion with ankle in plantargrade (mean age 59 years, BMI 25). A 25N lateral force was applied to the medial metatarsal head using an algometer. Lateral displacement of the foot was measured with SL intact, sectioned, following FibreWire(®) repair, then Arthrex InternalBrace (IB) reconstruction, then with selective sectioning of each limb of the IB reconstruction...
June 3, 2017: Foot
https://www.readbyqxmd.com/read/29126038/magnetic-resonance-imaging-findings-of-chronic-plantar-fasciitis-before-and-after-extracorporeal-shock-wave-therapy
#20
Masahiro Maki, Kazuya Ikoma, Masamitsu Kido, Yusuke Hara, Koshiro Sawada, Suzuyo Ohashi, Toshikazu Kubo
INTRODUCTION: The objective of this study is to examine the relationships between treatment outcome and changes in magnetic resonance (MR) imaging findings after extracorporeal shock wave therapy (ESWT) for chronic plantar fasciitis. METHODS: The subjects were 23 feet of 23 patients of refractory plantar fasciitis. The mean age was 53.7 years. The thickness of the plantar fascia (PF) and findings of a high-signal intensity area (HSIA) inside the PF, edema around the PF, and bone marrow edema (BME) of the calcaneus were investigated on MR images...
October 26, 2017: Foot
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