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Plantar plate

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
Gary M LiMarzi, Kurt F Scherer, Michael L Richardson, David R Warden, Christopher W Wasyliw, Jack A Porrino, Christopher R Pettis, Gideon Lewis, Christopher C Mason, Laura W Bancroft
A variety of surgical procedures exist for repair of both traumatic and degenerative osseous and soft-tissue pathologic conditions involving the foot and ankle. It is necessary for the radiologist to be familiar with these surgical procedures, so as to assess structural integrity, evaluate for complicating features, and avoid diagnostic pitfalls. Adequate interpretation of postoperative changes often requires access to surgical documentation to evaluate not only the surgery itself but the expected timeline for resolution of normal postoperative changes versus progressive disease...
October 2016: Radiographics: a Review Publication of the Radiological Society of North America, Inc
Mouna Ghedira, Jean-Michel Gracies, Valentina Mardale, Catherine-Marie Loche, Inke Marie Albertsen, Nicolas Bayle, Emilie Hutin
OBJECTIVE: In spastic hemiparesis, quantify agonist recruitment of tibialis anterior and triceps surae spastic cocontraction during swing phase of gait. MATERIAL/PATIENTS AND METHODS: Thirty-seven subjects with chronic hemiparesis (49±14 years, mean±SD; time since lesion, 8±7 years) performed a 3D gait analysis, barefoot at comfortable speed (10 optoelectronic cameras, 6 dynamometric force plates, analysis of 9 cycles), with bilateral electromyography of tibialis anterior (TA), soleus (SO) and gastrocnemius medialis (GM)...
September 2016: Annals of Physical and Rehabilitation Medicine
John Grice, Daniel Marsland, George Smith, James Calder
BACKGROUND: Corticosteroid injections have been used for a variety of foot and ankle pathologies over the years, and our aim was to evaluate the efficacy and safety of them in our clinic. MATERIALS AND METHODS: We performed a retrospective review of notes and a telephone questionnaire on the clinical outcome of all patients who underwent a corticosteroid injection of the foot or ankle in a year. All procedures were performed in an outpatient setting by a consultant musculoskeletal radiologist using either ultrasound or X-ray guidance and had a minimum of 2 years of follow-up...
September 25, 2016: Foot & Ankle International
Nico M G Maas, Margot van der Grinten, Wichor M Bramer, Gert-Jan Kleinrensink
BACKGROUND: Instability of the metatarsophalangeal (MTP) joints of the lesser toes (digiti 2-5) is increasingly being treated by repair of the plantar plate (PP). This systematic review examines the anatomy of the plantar plate of the lesser toes, and the relation between the integrity of the plantar plates of the lesser toes and lesser MTP joint stability. METHODS: The databases of, Medline (Ovid), Web of Science, Scopus, Cochrane, Pubmed not medline, Cinahl (ebsco), ProQuest, Lilacs, Scielo and Google Scholar were searched in June 2015 from inception...
2016: Journal of Foot and Ankle Research
Michel Chraim, Peter Bock, Hamza M Alrabai, Hans-Jörg Trnka
AIMS: This study was aimed to study the arthrodesis of the first metatarsophalangeal joint using an oblique interfragmentary lag screw and dorsal plate as an effective option for the treatment of hallux rigidus. Few researchers have studied the outcome of this surgical method over a long follow-up period. PATIENTS AND METHODS: We performed a retrospective review of 60 patients status post arthrodesis of the first metatarsophalangeal joint. The mean age was 68.5 years and average follow-up lasted for 47...
August 20, 2016: International Orthopaedics
Su-Bin Joo, Seung Eel Oh, Joung Hwan Mun
In this study, we describe a method to predict 6-axis ground reaction forces based solely on plantar pressure (PP) data obtained from insole type measurement devices free of space limitations. Because only vertical force is calculable from PP data, a wavelet neural network derived from a non-linear mapping function was used to obtain 3-axis ground reaction force in medial-lateral (GRFML), anterior-posterior (GRFAP) and vertical (GRFV) and 3-axis ground reaction moment in sagittal (GRFS), frontal (GRFF) and transverse (GRFT) data for the remaining axes and planes...
October 3, 2016: Journal of Biomechanics
Chun-Ming Yin, Xiao-Hua Pan, Yu-Xin Sun, Zhi-Bin Chen
In the present study we investigated the effects of different durations of using high-heeled shoes on plantar pressure and gait. A questionnaire survey and dynamic plantar pressure measurements were performed in 20 control females and 117 females who had worn high-heeled shoes for a long time. According to the duration of using high-heeled shoes (as specified in the questionnaire), subjects were divided into a control group and five groups with different durations of use (i.e. <2years, 2-5years, 6-10years, 11-20years and >20years)...
October 2016: Human Movement Science
Taliha Harika Aydin, Özgür Devrim Can, Ümide Demir Özkay, Nazlı Turan
In this study, we investigated the effects of subacute agomelatine (40 and 80 mg/kg) administration on chronic hyperglycemia, metabolic parameters, and pain perception in streptozotocin-induced diabetic rats. Fasting blood glucose measurements and oral glucose tolerance tests were performed to evaluate the effect of agomelatine on glycemia, while metabolic parameters were monitored by using metabolic cages. Potential effect of agomelatine on diabetes-induced mechanical and thermal allodynia was evaluated by using dynamic plantar aesthesiometer and warm plate (38°C) tests, respectively...
July 16, 2016: Fundamental & Clinical Pharmacology
Mary G Leonard, Shawn Jung, Shridhar V Andurkar, Anil Gulati
Centhaquin has been shown to produce antinociception in the mouse hot plate and tail flick assays through the opioid, the α2A and α2B adrenoceptors. Present study was conducted to determine the effects of centhaquin in a rat model of postoperative pain. Involvement of opioid, and adrenergic receptors was assessed by pretreating rats with antagonists at the opioid (naloxone), α2-(atipamezole) or α2B-(imiloxan) adrenergic receptors. Postoperative pain was induced by hind paw plantar incision in male Sprague Dawley rats...
October 15, 2016: European Journal of Pharmacology
Caio Nery, Hilary Umans, Daniel Baumfeld
The plantar plate has recently gained more attention as an important structure contributing to lesser metatarsophalangeal joint stability. This has prompted a significant growth of interest in the anatomy and biomechanics of the plantar plate and in the diagnosis and treatment of its injuries. Improved understanding of plantar plate function and predictable patterns of degeneration and failure has led to the development of a clinical staging and surgical grading system of plantar plate lesions. Relatively recent innovations allow the surgeon to access and repair plantar plate tears directly with reinsertion onto the base of the proximal phalanx...
April 2016: Seminars in Musculoskeletal Radiology
James M Linklater, Stephen J Bird
Plantar plate degeneration and tear is a common cause of forefoot pain, typically involving the second metatarsophalangeal joint at the proximal phalangeal insertion laterally, frequently confused with the second web space Morton neuroma. The condition has received increased attention with the development of surgical techniques that can result in successful repair of the plantar plate and substantial improvement in patient symptoms. High-resolution MRI or ultrasound can confirm a diagnosis of plantar plate degeneration and tear and exclude other pathologies, particularly Morton neuroma...
April 2016: Seminars in Musculoskeletal Radiology
Lin Liu, Song-He Ma, Ling-Jie Xia
OBJECTIVE: The thiamin is often used in the treatment of neuropathy, and pregabalin is often used to treat neuropathic pain. Our study examined the influence of thiamin on the efficacy of pregabalin in a rat model of spinal nerve ligation (SNL)-induced neuropathic pain. METHODS: Sprague-Dawley male rats were randomly divided into six groups. The neuropathic pain-relieving properties were measured by plantar test, cold plate test, and hot plate test after administration of pregabalin (i...
August 2016: Neurological Research
Daniel Goldbloom, Nilesh Makwana, Patrick Laing, Eric Toullec, Wilfrid Graff, Antoine Charbel
BACKGROUND: Proximal osteotomy of the first metatarsal is often indicated for Hallux Valgus correction. Previously recognised complications however, include transfer metatarsalgia, first metatarsophalangeal joint stiffness, problems with fixation and prominence of metalware. METHODS: We report on one year follow up of an international prospective series between June 2009 and October 2012 involving three centres, including 91 feet (58 patients) that underwent proximal osteotomy, using a new locking plate applied to the plantar surface of the metatarsal...
June 2016: Foot and Ankle Surgery: Official Journal of the European Society of Foot and Ankle Surgeons
Xianyi Zhang, Bo Li, Kaiyun Liang, Qiufeng Wan, Benedicte Vanwanseele
Conventional heel lift with a flat surface increases the risk of foot problems related to higher plantar pressure and decreased stability. In this study, an optimized design of in-shoe heel lifts developed to maintain the midfoot function was tested to investigate if the plantar pressure distribution was improved. The design was based on three dimensional foot plantar contour which was captured by an Infoot 3D scanning system while the heel was elevated by a heel wedge. To facilitate midfoot function, an arch support was designed to support the lateral longitudinal arch, while allowing functional movement of the medial longitudinal arch...
June 2016: Gait & Posture
Caio Nery, Michael Coughlin, Daniel Baumfeld, Fernando Raduan, Tania Szejnfeld Mann, Fernanda Catena
OBJECTIVE: To find the best clinical parameters for defining and classifying the degree of plantar plate injuries. METHOD: Sixty-eight patients (100 metatarsophalangeal joints) were classified in accordance with the Arthroscopic Anatomical Classification for plantar plate injuries and were divided into five groups (0 to IV). Their medical files were reviewed and the incidence of each parameter for the respective group was correlated. These parameters were: use of high heels, sports, acute pain, local edema, Mulder's sign, widening of the interdigital space, pain in the head of the corresponding metatarsal, touching the ground, "drawer test", toe grip and toe deformities (in the sagittal, coronal and transversal planes)...
November 2015: Revista Brasileira de Ortopedia
Kewwan Kim, Kyoungkyu Jeon
[Purpose] The purpose of this study was to determine potential predictors of functional instability of the knee and ankle joints during single-leg drop landing based on the prior history of injury. [Subjects and Methods] The subjects were 24 collegiate soccer players without pain or dysfunction. To compare the differences between the stable and unstable sides during single-leg drop landing, 8 motion analysis cameras and a force plate were used. The Cortex 4 software was used for a biomechanical analysis of 3 events...
April 2016: Journal of Physical Therapy Science
Katie A Ewing, Rezaul K Begg, Mary P Galea, Peter V S Lee
BACKGROUND: Anterior cruciate ligament (ACL) injuries commonly occur during landing maneuvers. Prophylactic knee braces were introduced to reduce the risk of ACL injuries, but their effectiveness is debated. HYPOTHESES: We hypothesized that bracing would improve biomechanical factors previously related to the risk of ACL injuries, such as increased hip and knee flexion angles at initial contact and at peak vertical ground-reaction force (GRF), increased ankle plantar flexion angles at initial contact, decreased peak GRFs, and decreased peak knee extension moment...
July 2016: American Journal of Sports Medicine
Valéria Tékus, Ádám Horváth, Zsófia Hajna, Éva Borbély, Kata Bölcskei, Melinda Boros, Erika Pintér, Zsuzsanna Helyes, Gábor Pethő, János Szolcsányi
AIMS: To investigate the roles of TRPV1 and TRPA1 channels in baseline and allyl isothiocyanate (AITC)-evoked nociceptive responses by comparing wild-type and gene-deficient mice. MAIN METHODS: In contrast to conventional methods of thermonociception measuring reflex latencies, we used our novel methods to determine the noxious heat threshold. KEY FINDINGS: It was revealed that the heat threshold of the tail measured by an increasing-temperature water bath is significantly higher in TRPV1(-/-), but not TRPA1(-/-), mice compared to respective wild-types...
June 1, 2016: Life Sciences
Stephen L Parsons, Avril Mansfield, Elizabeth L Inness, Kara K Patterson
OBJECTIVES: Stroke rehabilitation best practices recommend interventions to address individual deficits, guided by a comprehensive assessment to identify specific impairments. The relationship of motor impairments to balance has been well investigated, but the role of impaired plantar cutaneous sensation is less understood, despite the fact that 41% of individuals post-stroke have this deficit. The study objectives were to (1) characterize the relationship between plantar sensation and measures of standing balance control and (2) determine the threshold of sensory impairment related to balance impairment post-stroke...
October 2016: Topics in Stroke Rehabilitation
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