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biomechanics, foot

Zhongkui Wang, Masamitsu Kido, Kan Imai, Kazuya Ikoma, Shinichi Hirai
Clinically in medializing calcaneal osteotomy (MCO), foot and ankle surgeons are facing difficulties in choosing appropriate surgical parameters due to the individual differences in deformities among flatfoot patients. Traditional cadaveric studies have provided important information regarding the biomechanical effects of tendons, ligaments, and plantar fascia, but limitations have been reached when dealing with individual differences and tailoring patient-specific surgeries. Therefore, this study aimed at implementing the finite element (FE) method to investigate the effect of different MCO parameters to help foot and ankle surgeons performing patient-specific surgeries...
March 15, 2018: Computer Methods in Biomechanics and Biomedical Engineering
Kristina Stanković, Brian G Booth, Femke Danckaers, Fien Burg, Philippe Vermaelen, Saartje Duerinck, Jan Sijbers, Toon Huysmans
Background: Foot morphology has received increasing attention from both biomechanics researches and footwear manufacturers. Usually, the morphology of the foot is quantified by 2D footprints. However, footprint quantification ignores the foot's vertical dimension and hence, does not allow accurate quantification of complex 3D foot shape. Methods: The shape variation of healthy 3D feet in a population of 31 adult women and 31 adult men who live in Belgium was studied using geometric morphometric methods...
2018: Journal of Foot and Ankle Research
Emilio Wagner, Pablo Wagner, Diego Zanolli, Rubén Radkievich, Gunther Redenz, Rodrigo Guzman
BACKGROUND: Tibialis posterior tendon transfer is performed when loss of dorsiflexion has to be compensated. We evaluated the circumtibial (CT), above-retinaculum transmembranous (TMAR), and under-retinaculum transmembranous (TMUR) transfer gliding resistance and foot kinematics in a cadaveric foot model during ankle range of motion (ROM). METHODS: Eight cadaveric foot-ankle distal tibia specimens were dissected free of soft tissues on the proximal end, applying an equivalent force to 50% of the stance phase to every tendon, except for the Achilles tendon...
March 1, 2018: Foot & Ankle International
Edward P Washabaugh, Chandramouli Krishnan
BACKGROUND: Robotic-resisted treadmill walking is a form of task-specific training that has been used to improve gait function in individuals with neurological injury, such as stroke, spinal cord injury, or cerebral palsy. Traditionally, these devices use active elements (e.g., motors or actuators) to provide resistance during walking, making them bulky, expensive, and less suitable for overground or in-home rehabilitation. We recently developed a low-cost, wearable robotic brace that generates resistive torques across the knee joint using a simple magnetic brake...
2018: Restorative Neurology and Neuroscience
Andrew K Buldt, Jamie J Allan, Karl B Landorf, Hylton B Menz
BACKGROUND: Foot posture is a risk factor for some lower limb injuries, however the underlying mechanism is not well understood. Plantar pressure analysis is one technique to investigate the interaction between foot posture and biomechanical function of the lower limb. RESEARCH QUESTION: The aim of this review was to investigate the relationship between foot posture and plantar pressure during walking. METHODS: A systematic database search was conducted using MEDLINE, CINAHL, SPORTDiscus and Embase to identify studies that have assessed the relationship between foot posture and plantar pressure during walking...
February 23, 2018: Gait & Posture
Luiz H P Vieira, Sérgio A Cunha, Renato Moraes, Fabio A Barbieri, Rodrigo Aquino, Lucas de P Oliveira, Martina Navarro, Bruno L S Bedo, Paulo R P Santiago
PURPOSE: The purpose of this study was to compare the kicking performance of young soccer players in the U9 to U20 age groups. METHOD: Three hundred and sixty-six Brazilian players were evaluated on an official pitch using three-dimensional kinematics to measure (300 Hz) ball velocity (Vball ), foot velocity (Vfoot ), Vball /Vfoot ratio, last stride length, and distance between the support foot and the ball. Simultaneously, a two-dimensional procedure was also conducted to compute (60 Hz) the mean radial error, bivariate variable error, and accuracy...
March 7, 2018: Research Quarterly for Exercise and Sport
Babak Faramarzi, An Nguyen, Fanglong Dong
Appropriate hoof preparation and symmetry are linked to the wellbeing of the horse. Previous studies have shown the efficacy of the pressure plates (PP) in delivering objective biomechanical analysis. We aimed to assess the effect of hoof trimming on hoof biomechanics using a PP. Nine clinically sound Arabian horses were walked across the PP while foot strike was recorded by a digital camera. Kinetic and kinematic parameters were recorded before and after trimming. P values ≤ 0.05 were considered significant...
February 27, 2018: Journal of Veterinary Science
Addison Williams Andrews, Richard Pine
BACKGROUND AND PURPOSE: Nocturnal lower limb cramps are sudden, intensely painful, and can decrease sleep, increase anxiety, and reduce quality of life. The purpose of this case report is to describe the effectiveness of an evidence-based physical therapy intervention for a person with lower limb cramps. CASE DESCRIPTION: The patient was a 34-year-old female who presented with idiopathic bilateral lower limb foot pain and cramps. INTERVENTION: Rehabilitation addressed muscle strength, joint mobility, soft tissue extensibility, and biomechanical influences during functional movement, for a total of seven sessions over seven weeks...
February 26, 2018: Physiotherapy Theory and Practice
M M Wiedemeijer, E Otten
BACKGROUND: Walking in high heels (HH) may alter gait in various ways, which may be of importance to designers and physicians. RESEARCH QUESTION: How does walking in high heels alter gait and how can this be explained from a biomechanical and control point of view. METHODS: Relevant literature has been collected in which high heeled walking was studied, after which the results were bundled and interpreted in a framework of biomechanics and control...
February 7, 2018: Gait & Posture
Se Won Lee, Ratnakar Veeramachaneni, Ibrahim Abou Saleh, Karen Morice, Timothy Tiu, Yungtai Lo, Kevin Frison, Matthew Bartels
BACKGROUND: Home-based therapy optimizing biomechanics and neuromuscular control is increasingly recognized as a treatment option for chronic nonspecific low back pain (CNSLBP). However, its impact on pain, function and gait is limited among patients in a metropolitan area. OBJECTIVE: To evaluate the change of pain, function and gait parameters with home-based therapy using footwear generated biomechanical manipulation and perturbation training (FGBMPT) in a population with CNSLBP in a metropolitan area...
February 20, 2018: PM & R: the Journal of Injury, Function, and Rehabilitation
Neil L Duplantier, Ronald J Mitchell, Steve Zambrano, Aaron C Stone, Domenica A Delgado, Bradley S Lambert, Michael R Moreno, Joshua D Harris, Patrick C McCulloch, David M Lintner, Kevin E Varner
BACKGROUND: Fifth metatarsal base fractures of the metaphyseal-diaphyseal watershed junction (Jones fracture) are commonly treated with surgical fixation in athletes. Intramedullary screw fixation remains the most utilized construct, although plantar-lateral plating is an alternative. Purpose/Hypothesis: The purpose was to compare the mechanical strength of fracture fixation between an intramedullary screw and plantar-lateral plating. The hypothesis was that plantar-lateral plate fixation would allow for more cycles and higher peak loads before failure, as well as less fracture gapping, than would an intramedullary screw in cadaveric foot specimens with simulated Jones fractures exposed to cantilever bending...
February 1, 2018: American Journal of Sports Medicine
C Markus Brahms, Yang Zhao, David Gerhard, John M Barden
From a research perspective, detailed knowledge about stride length (SL) is important for coaches, clinicians and researchers because together with stride rate it determines the speed of locomotion. Moreover, individual SL vectors represent the integrated output of different biomechanical determinants and as such provide valuable insight into the control of running gait. In recent years, several studies have tried to estimate SL using body-mounted inertial measurement units (IMUs) and have reported promising results...
February 10, 2018: Journal of Biomechanics
M J Petrie, C M Blakey, C Chadwick, H G Davies, C M Blundell, M B Davies
AIMS: Fractures of the navicular can occur in isolation but, owing to the intimate anatomical and biomechanical relationships, are often associated with other injuries to the neighbouring bones and joints in the foot. As a result, they can lead to long-term morbidity and poor function. Our aim in this study was to identify patterns of injury in a new classification system of traumatic fractures of the navicular, with consideration being given to the commonly associated injuries to the midfoot...
February 2018: Bone & Joint Journal
Jackie D Zehr, Danielle R Carnegie, Timothy N Welsh, Tyson A C Beach
PURPOSE: To compare the effects of object handled and handgrip used on lumbar spine motion and loading during occupational lifting task simulations. METHODS: Eight male and eight female volunteers performed barbell and crate lifts with a pronated (barbell) and neutral (crate) handgrip. The mass of barbells/crates lifted was identical across the objects and fixed at 11.6 kg and 9.3 kg for men and women, respectively. The initial heights of barbells/crates were individualized to mid-shank level...
February 13, 2018: International Journal of Occupational Safety and Ergonomics: JOSE
Hiroshi Ohi, Hirotaka Iijima, Naoto Fukutani, Tomoki Aoyama, Eishi Kaneda, Kazuko Ohi, Hiromu Ito, Shuichi Matsuda, Abe Kaoru
The foot is speculated to play a role in knee joint kinematics. This exploratory cross-sectional study examined the association between static foot posture and the presence of varus thrust visualized during gait in patients with medial knee osteoarthritis (OA). Patients (n = 88 patients and 134 knees; age, 61-91 years; 68.2% female) with Kellgren/Lawrence (K/L) grade ≥1 in the medial compartment were included in this study and underwent gait observation for varus thrust. These patients' three-dimensional static foot posture while standing was evaluated and their tibiofemoral joint K/L grades and anatomical axis angles were also assessed as covariates...
January 29, 2018: Gait & Posture
Karsten Hollander, Julie Stebbins, Inke Marie Albertsen, Daniel Hamacher, Kornelia Babin, Claudia Hacke, Astrid Zech
BACKGROUND: While altered foot arch characteristics (high or low) are frequently assumed to influence lower limb biomechanics and are suspected to be a contributing factor for injuries, the association between arch characteristics and lower limb running biomechanics in children is unclear. RESEARCH QUESTION: Therefore, the aim of this study was to investigate the relationship between a dynamically measured arch index and running biomechanics in healthy children...
February 1, 2018: Gait & Posture
Marco A Martínez Bocanegra, Javier Bayod Lopez, A Vidal-Lesso, Ricardo Becerro de Bengoa Vallejo, Raúl Lesso-Arroyo
BACKGROUND: Currently, the metatarsophalangeal joint replacement through a restorative arthroplasty, where implants are used, is a viable invasive surgical medical procedure in the treatment of severe cases of osteoarthritis in this joint, better known as hallux rigidus. However, few things are known about the postoperative complications that implants can cause on the joint, like Swanson and Tornier implants.Research in this field can provide a valuable information that would help the specialist surgeon in the decision-making during the selection of the more suitable joint implant in each patient, as well as the redesign of the devices, to make them more efficient, durable and biocompatible with the human body...
October 20, 2017: Foot and Ankle Surgery: Official Journal of the European Society of Foot and Ankle Surgeons
Qichang Mei, Yaodong Gu, Justin Fernandez
Physique changes during pregnancy lead to gait characteristic variations. This study aimed to analyse gait of pregnant individuals throughout pregnancy and post-partum. Sixteen healthy pregnant women volunteered as participants and had their lower limb kinematics analysed through a VICON three-dimensional motion system and plantar pressure measured with a Novel EMED force plate. Significant changes were observed in pelvic anterior motion, hip and ankle joint kinematics. Mean pressure distribution and COP trajectory deviation altered accordingly with increased pregnancy time, compared with post-partum...
February 2, 2018: Scientific Reports
Animesh Hazari, Arun G Maiya, Shivashankara K N
BACKGROUND: A kinetic change in thefoot like altered plantar pressure is the most common etiological risk factor for causing foot ulcers among people with diabetes mellitus. Kinematic alterations in joint angle and spatiotemporal parameters of the gait have also been frequently observed in participants with diabetes peripheral neuropathy. Diabetes peripheral neuropathy is the most common long-term standing complication of type 2 diabetes mellitus. It leads to various micro and macrovascular related complication of the foot...
February 1, 2018: Journal of the American Podiatric Medical Association
Katherine M Edenfield
The midfoot and forefoot are the regions of the foot distal to the talus and calcaneus and are critical to weight bearing and movement. They help support the arch of the foot, provide shock absorption, and convert vertically oriented forces into horizontal forward and propulsive movement. A spectrum of acute, subacute, and chronic conditions in these regions can cause pain and decreased function. A thorough history and physical examination should include foot and leg biomechanics, alignment, and posture in addition to palpation of painful areas...
February 2018: FP Essentials
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