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https://www.readbyqxmd.com/read/28046009/stiffness-effects-in-rocker-soled-shoes-biomechanical-implications
#1
Shih-Yun Lin, Pei-Fang Su, Chia-Hua Chung, Chi-Chun Hsia, Chih-Han Chang
Rocker-soled shoes provide a way to reduce the possible concentration of stress, as well as change movement patterns, during gait. This study attempts to examine how plantar force and spatio-temporal variables are affected by two rocker designs, one with softer and one with denser sole materials, by comparing them with the barefoot condition and with flat-soled shoes. Eleven subjects' gait parameters during walking and jogging were recorded. Our results showed that compared with barefoot walking, plantar forces were higher for flat shoes while lower for both types of rocker shoes, the softer-material rocker being the lowest...
2017: PloS One
https://www.readbyqxmd.com/read/28033053/the-effect-of-walking-speed-on-foot-kinematics-is-modified-when-increased-pronation-is-induced
#2
Joana F Hornestam, Thales R Souza, Paula Arantes, Juliana Ocarino, Paula L Silva
BACKGROUND: The relation between walking speed and foot kinematics during gait is not well established, and neither is it clear whether this relation is modified in the presence of factors expected to increase pronation (eg, abnormal foot alignment). Understanding how foot kinematics is affected by walking speed under varying conditions could contribute to our understanding of stresses to the musculoskeletal system during walking. We evaluated the effect of walking speed on foot kinematics in the frontal plane during gait and determined whether this effect is modified by using medially inclined insoles that force the foot into increased pronation...
November 2016: Journal of the American Podiatric Medical Association
https://www.readbyqxmd.com/read/28008365/development-of-a-prototype-of-portable-fes-rehabilitation-system-for-relearning-of-gait-for-hemiplegic-subjects
#3
Takashi Watanabe, Shun Endo, Ryusei Morita
This study aimed at developing a prototype of portable FES rehabilitation system for relearning gait pattern of healthy subjects, which can measure gait information during walking applying electrical stimulation for foot drop correction or providing timing information. A gait event detection method using an inertial sensor attached on the foot was determined based on gait of healthy subjects from simultaneous measurements with pressure sensors. From the result of comparing the detected gait event timings with EMG signal of the tibialis anterior muscle during walking of healthy subjects, the toe off and the foot flat timings detected by the inertial sensor were suggested to be useful to determine the stimulation timing for the foot drop correction...
December 2016: Healthcare Technology Letters
https://www.readbyqxmd.com/read/27960398/highly-anisotropic-adhesive-film-made-from-upside-down-flat-and-uniform-vertically-aligned-cnts
#4
Sanghyun Hong, Troy Lundstrom, Ranajay Ghosh, Hamed Abdi, Ji Hao, Sun Kyoung Jeoung, Paul Su, Jonghwan Suhr, Ashkan Vaziri, Nader Jalili, Yung Joon Jung
We have created a multifunctional dry adhesive film with transferred vertically aligned carbon nanotubes (VA-CNTs). This unique VA-CNT film was fabricated by a multistep transfer process, converting the flat and uniform bottom of VA-CNTs grown on atomically flat silicon wafer substrates into the top surface of an adhesive layer. Unlike as-grown VA-CNTs, which have a nonuniform surface, randomly entangled CNT arrays, and a weak interface between the CNTs and substrates, this transferred VA-CNT film shows an extremely high coefficient of static friction (COF) of up to 60 and a shear adhesion force 30 times higher (12 N/cm(2)) than that of the as-grown VA-CNTs under a very small preloading of 0...
December 14, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27922985/video-analysis-of-anterior-cruciate-ligament-acl-injuries-a-systematic-review
#5
Victor R Carlson, Frances T Sheehan, Barry P Boden
BACKGROUND: As the most viable method for investigating in vivo anterior cruciate ligament (ACL) rupture, video analysis is critical for understanding ACL injury mechanisms and advancing preventative training programs. Despite the limited number of published studies involving video analysis, much has been gained through evaluating actual injury scenarios. METHODS: Studies meeting criteria for this systematic review were collected by performing a broad search of the ACL literature with use of variations and combinations of video recordings and ACL injuries...
November 29, 2016: JBJS Reviews
https://www.readbyqxmd.com/read/27886420/posterior-tibial-tendinopathy-associated-with-matrix-metalloproteinase-13-promoter-genotype-and-haplotype
#6
REVIEW
Francielle Boçon de Araujo Munhoz, José Eduardo Baroneza, Alexandre Godoy-Santos, Túlio Diniz Fernandes, Filipe Polese Branco, Lupe Furtado Alle, Ricardo Lehtonen de Souza, Maria Cristina Leme Godoy Dos Santos
BACKGROUND: Posterior tibial tendon (PTT) is particularly vulnerable and its insufficiency is recognized as the main cause of adult acquired flat foot. Some patients have a predisposition without a clinically recognized cause, suggesting that individual characteristics play an important role in tendinopathy. The present study investigated whether genetic variants in matrix metalloproteinases (MMPs) are associated with PTT dysfunction. METHODS: One hundred women who presented PTT dysfunction, with histopathological examination of the tendon and magnetic resonance imaging (MRI) confirming tendinopathy, as well as 100 asymptomatic women who presented intact PPT as assessed by MRI and constituting the control group, were evaluated for MMP-13 g...
November 2016: Journal of Gene Medicine
https://www.readbyqxmd.com/read/27876118/flat-shoes-increase-neurogenesis
#7
J Flensmark
The impairment of the horizontal is caused by elevation of the heel of the foot from the ground. Receptors in the soles of the feet provide a mapping of body orientation to the upright, and is identical to Mittelstaedt's idiotropic tendency. Initiation of gait wearing flat shoes without elevation of the heel is sufficient to change to a truthful horizontal. Using flat shoes increases neurogenesis and leads to a decreased frequency of diseases of the nervous system.
December 2016: Medical Hypotheses
https://www.readbyqxmd.com/read/27847725/rehabilitation-treatment-of-a-child-diagnosed-with-duplication-of-1q42-q44-a-case-report
#8
Seong Woo Kim, Jiyong Kim, Ha Ra Jeon, Min Jung Park, Yoon Kim
Trisomy 1 is a rare chromosomal anomaly and has never been reported in Korea. Clinical features of trisomy 1 include macrocephaly, prominent forehead, flat nasal bridge, low set ears, and micrognathia, all of which result in a very distinguishable facial structure. A child with trisomy 1 also suffers from mental retardation and/or developmental delays. In this case report, the child was diagnosed with de novo trisomy 1 without receiving any treatment until visiting our hospital. The child suffered from foot and ankle deformities, leading her unable to stand independently...
October 2016: Annals of Rehabilitation Medicine
https://www.readbyqxmd.com/read/27843284/studying-maximum-plantar-stress-per-insole-design-using-foot-ct-scan-images-of-hyperelastic-soft-tissues
#9
Ali Sarikhani, Abbas Motalebizadeh, Sasan Asiaei, Babak Kamali Doost Azad
The insole shape and the resulting plantar stress distribution have a pivotal impact on overall health. In this paper, by Finite Element Method, maximum stress value and stress distribution of plantar were studied for different insoles designs, which are the flat surface and the custom-molded (conformal) surface. Moreover, insole thickness, heel's height, and different materials were used to minimize the maximum stress and achieve the most uniform stress distribution. The foot shape and its details used in this paper were imported from online CT-Scan images...
2016: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/27825592/immediate-effects-of-foot-orthoses-on-pain-during-functional-tasks-in-people-with-patellofemoral-osteoarthritis-a-cross-over-proof-of-concept-study
#10
Natalie J Collins, Rana S Hinman, Hylton B Menz, Kay M Crossley
BACKGROUND: The purpose of the study was to determine whether prefabricated foot orthoses immediately reduce pain during functional tasks in people with patellofemoral osteoarthritis, compared to flat insoles and shoes alone. METHODS: Eighteen people with predominant lateral patellofemoral osteoarthritis (nine women; mean [SD] age 59 [10]years; body mass index 27.9 [3.2]kg/m(2)) performed functional tasks wearing running sandals, and then wearing foot orthoses and flat insoles (random order)...
November 4, 2016: Knee
https://www.readbyqxmd.com/read/27824657/effect-of-footwear-on-joint-pain-and-function-in-older-adults-with-lower-extremity-osteoarthritis
#11
Amy Wagner, Sarah Luna
BACKGROUND AND PURPOSE: Lower extremity osteoarthritis (OA) is a common condition among older adults; given the risks of surgical and pharmaceutical interventions, conservative, lower-cost management options such as footwear warrant further investigation. This systematic review investigated the effects of footwear, including shoe inserts, in reducing lower extremity joint pain and improving gait, mobility, and quality of life in older adults with OA. METHODS: The CINAHL, SPORTDiscus, PubMed, RECAL, and Web of Knowledge databases were searched for publications from January 1990 to September 2014, using the terms "footwear," "shoes," "gait," "pain," and "older adult...
November 7, 2016: Journal of Geriatric Physical Therapy
https://www.readbyqxmd.com/read/27782089/plantar-pressure-detection-with-fiber-bragg-gratings-sensing-system
#12
Tsair-Chun Liang, Jhe-Jhun Lin, Lan-Yuen Guo
In this paper, a novel fiber-optic sensing system based on fiber Bragg gratings (FBGs) to measure foot plantar pressure is proposed. This study first explores the Pedar-X insole foot pressure types of the adult-size chart and then defines six measurement areas to effectively identify four foot types: neutral foot, cavus foot, supinated foot and flat foot. The plantar pressure signals are detected by only six FBGs, which are embedded in silicone rubber. The performance of the fiber optic sensing is examined and compared with a digital pressure plate of i-Step P1000 with 1024 barometric sensors...
October 22, 2016: Sensors
https://www.readbyqxmd.com/read/27777208/-anlysis-of-foot-biomechanics-characteristic-in-303-patients-with-type-2-diabetes-mellitus
#13
Wen-Xia Li, Ying Cao, Meng-Chen Zou, Ying Huang, Ping Hu, Xiang-Rong Luo, Ya Jiang, Yao-Ming Xue, Fang Gao
OBJECTIVE: To investigate foot biomechanics characteristic of patients with type 2 diabetes mellitus. METHODS: This study was conducted among 303 patients with type 2 diabetes. The whole foot was divided into 10 regions, namely the first toe (T1); the second to fifth toes (T2-5); the first, second, third, fourth, and fifth metatarsals (M1, M2, M3, M4, and M5, respectively); midfoot (MF), and the heel medial (HM). Foot arch index, foot angle and maximum peak pressure (MPP) of the 10 regions were measured using a Footscan gait system...
October 20, 2016: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/27765088/-effects-of-local-transplantation-of-autologous-adipose-derived-mesenchymal-stem-cells-on-the-formation-of-hyperplastic-scar-on-rabbit-ears
#14
L Chen, D L Wang, Z R Wei, B Wang, J P Qi, G F Sun
Objective: To investigate the effects of local transplantation of autologous adipose-derived mesenchymal stem cells (ADSCs) on the formation of hyperplastic scar on rabbit ears. Methods: ADSCs were isolated from inguinal fat of six New Zealand rabbits and then sub-cultured. ADSCs of the third passage of each rabbit were used in the following experiments. Six full-thickness skin defect wounds with diameter of 6 mm on the ventral surface of every rabbit ear were made. Wound healing and local-tissue proliferation were observed, and complete epithelization time of wounds and formation time of hyperplastic scar were recorded...
October 20, 2016: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/27760729/a-portable-infrared-photoplethysmograph-heartbeat-of-mytilus-galloprovincialis-analyzed-by-mri-and-application-to-bathymodiolus-septemdierum
#15
Eriko Seo, Toshiyuki Sazi, Morio Togawa, Osamu Nagata, Masataka Murakami, Shigeaki Kojima, Yoshiteru Seo
Infrared photoplethysmogram (IR-PPG) and magnetic resonance image (MRI) of the Mytilus galloprovincialis heart were obtained simultaneously. Heart rate was varied by changing temperature, aerial exposure and hypoxia. Higher heart rates (35-20 beat min(-1)) were usually observed at 20°C under the aerobic condition, and typical IR-PPG represented a single peak (peak v). The upward and downward slopes of the peak v corresponded to the filling and contracting of the ventricle, respectively. A double-peak IR-PPG was observed in a wide range of heart rates (5 to 35 beats min(-1)) under various conditions...
November 15, 2016: Biology Open
https://www.readbyqxmd.com/read/27756526/anterior-cruciate-ligament-rupture-is-associated-with-abnormal-and-asymmetrical-lower-limb-loading-during-walking
#16
Hongshi Huang, Noël Keijsers, Herwin Horemans, Qinwei Guo, Yuanyuan Yu, Henk Stam, Stephan Praet, Yingfang Ao
OBJECTIVES: Anterior Cruciate Ligament (ACL) deficiency may result in abnormal lower limb loading with increased foot pronation. This study evaluated spatiotemporal parameters and plantar pressure distribution during walking in participants with and without an ACL rupture. DESIGN: Cross-sectional. METHODS: Plantar pressure was measured in 42 unilateral ACL deficient (ACLD) participants and 32 healthy controls while walking barefoot. Spatiotemporal parameters, pressure distribution and center of pressure (CoP) during foot roll off were determined...
September 30, 2016: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/27752287/getting-the-right-balance-insole-design-alters-the-static-balance-of-people-with-diabetes-and-neuropathy
#17
Joanne Paton, Sam Glasser, Richard Collings, Jon Marsden
BACKGROUND: Over 1 in 3 older people with diabetes sustain a fall each year. Postural instability has been identified as independent risk factor for falls within people with Diabetic Peripheral Neuropathy (DPN). People with DPN, at increased risk of falls, are routinely required to wear offloading insoles, yet the impact of these insoles on postural stability and postural control is unknown. The aim of this study was to evaluate the effect of a standard offloading insole and its constituent parts on the balance in people with DPN...
2016: Journal of Foot and Ankle Research
https://www.readbyqxmd.com/read/27723362/changing-sagittal-plane-landing-styles-to-modulate-impact-and-tibiofemoral-force-magnitude-and-directions-relative-to-the-tibia
#18
Yohei Shimokochi, Jatin P Ambegaonkar, Eric G Meyer
CONTEXT: Ground reaction force (GRF) and tibiofemoral force magnitudes and directions have been shown to affect anterior cruciate ligament loading during landing. However, the kinematic and kinetic factors modifying these 2 forces during landing are unknown. OBJECTIVE: To clarify the intersegmental kinematic and kinetic links underlying the alteration of the GRF and tibiofemoral force vectors secondary to changes in the sagittal-plane body position during single-legged landing...
September 2016: Journal of Athletic Training
https://www.readbyqxmd.com/read/27721087/selective-activation-of-lower-leg-muscles-during-maximum-voluntary-isometric-contractions
#19
Marco Hagen, Gerrit Schwiertz, Karl B Landorf, Hylton B Menz, George S Murley
The pronators and supinators play a key role in the medio-lateral stability of the ankle joint complex (i.e. talo-crural and subtalar joints). We hypothesized that each shank muscle has a specific activation pattern determined by its anatomical course around the axes of the subtalar and talo-crural joints. A secondary objective was to examine the effect of foot posture on these activation patterns. Forty-nine young adults (25 normal-arched feet, 24 flat-arched feet) performed maximum voluntary isometric contractions against manual resistance in four movement directions: plantarflexion (PF), dorsiflexion (DF), pronation (PRO) and supination (SUP)...
December 2016: Human Movement Science
https://www.readbyqxmd.com/read/27676887/podiatric-complications-during-a-premature-aging-syndrome-rare-case
#20
Siham Zahi, Laila Mahir, Soumia Meftah, Fatima Lmidmani, Abdellatif El Fatimi
OBJECTIVE: Premature aging syndromes are very rare and most often hereditary. Initially purely descriptive entities, these syndromes are now much better understood genetically and pathophysiologically and can now be classified according to the mechanisms involved. They often manifest as a pigmented skin dry, atrophic and sclerotic. There is no treatment for these conditions apart from that of their complications (frequent ulceration). OBSERVATIONS: Forty-five years of patient follow-up in dermatology for premature aging syndrome, addressed in our service for podiatric care...
September 2016: Annals of Physical and Rehabilitation Medicine
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