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Medial longitudinal arch

Nicholas A Campitelli, Scott A Spencer, Kaitlyn Bernhard, Kristen Heard, Alan Kidon
BACKGROUND: This study investigated the effect of Vibram FiveFingers Bikila minimalist shoes on intrinsic foot musculature. We hypothesized that a gradual transition into minimalist shoes will increase the thickness of the abductor hallucis muscle. METHODS: Forty-one individuals were divided into four groups: control (traditional shod) (n = 9), restricted walking in Vibram FiveFingers (n = 11), running in Vibram FiveFingers (n = 10), and unlimited walking in Vibram FiveFingers (n = 11)...
September 2, 2016: Journal of the American Podiatric Medical Association
Thomas G McPoil, Jessica Ford, Joel Fundaun, Chelsea Gallegos, Andrew Kinney, Peter McMillan, Jessica Murphy, Elliot Sky, Derrick Torba, Michael Bade
Previous studies have successfully used the longitudinal arch angle (LAA) to assess foot posture, but the measurement consistency and ability of the LAA to predict dynamic foot posture during activity in a variety of foot types have not been evaluated. The purpose of this study was to determine the reliability of the LAA as well as if the clinical method of assessing the LAA could be used to predict the LAA at midstance during walking for supinated, normal, and pronated foot types. The Arch Height Ratio was used to select 35 participants with 12 supinated, 46 normal, and 12 pronated feet...
September 20, 2016: Foot
Thomas M Gooding, Mark A Feger, Joseph M Hart, Jay Hertel
CONTEXT:  The intrinsic foot muscles maintain the medial longitudinal arch and aid in force distribution and postural control during gait. Impaired intrinsic foot-muscle function has been linked to various foot conditions. Several rehabilitative exercises have been proposed to improve it; however, literature that identifies which individual muscles are activated during specific intrinsic foot-muscle exercises is lacking. OBJECTIVE:  To describe changes in activation of the intrinsic plantar foot muscles after 4 exercises as measured with T2 time magnetic resonance imaging (MRI)...
October 3, 2016: Journal of Athletic Training
Toshinori Kurashige, Seiichi Suzuki
: Some authors reported the results from percutaneous distal metatarsal osteotomy for hallux valgus recently. On the other hand, there are few reports of percutaneous proximal metatarsal osteotomy. The purpose of the present study was to evaluate the radiographic results of percutaneous proximal closing wedge osteotomy with Akin osteotomy for correction of severe hallux valgus and increasing longitudinal arch height. Consecutive 17 feet (mean age = 70.8 years) were investigated. The mean follow-up was 22 months...
September 9, 2016: Foot & Ankle Specialist
Anastasia Bjelopetrovich, Joaquin A Barrios
Deformation of the medial longitudinal arch under body weight loading is often assessed using the Arch Height Index Measurement System. This system assesses change in arch height between sitting and standing, estimated to be 10% and 50% of body weight, respectively. However, body weight forces during ambulation exceed these loads, therefore limiting our understanding of arch deformation under ambulatory load ranges. Thus, the study aims were (1) to assess if sitting and standing arch height differed from that seen under 10% and 50% body weight using a force target-matching procedure, and (2) to quantify the assumed linearity of arch stiffness, measured statically, throughout an ambulatory load range...
October 3, 2016: Journal of Biomechanics
Hayelom K Mekonen, Jill P J M Hikspoors, Greet Mommen, S Eleonore Köhler, Wouter H Lamers
Although the intrinsic muscles of the back are defined by their embryological origin and innervation pattern, no detailed study on their development is available. Human embryos (5-10 weeks development) were studied, using Amira3D® reconstruction and Cinema4D® remodelling software for visualization. At Carnegie Stage (CS)15, the epaxial portions of the myotomes became identifiable laterally to the developing vertebrae. At CS16, these portions fused starting cranially to form a longitudinal muscle column, which became innervated by the dorsal branches of the spinal nerves...
August 29, 2016: Clinical Anatomy
Megan E R Balsdon, Kristen M Bushey, Colin E Dombroski, Marie-Eve LeBel, Thomas R Jenkyn
The structure of the medial longitudinal arch (MLA) affects the foot's overall function and its ability to dissipate plantar pressure forces. Previous research on the MLA includes measuring the calcaneal-first metatarsal angle using a static sagittal plane radiograph, a dynamic height-to-length ratio using marker clusters with a multisegment foot model, and a contained angle using single point markers with a multisegment foot model. The objective of this study was to use biplane fluoroscopy to measure a contained MLA angle between foot types: pes planus (low arch), pes cavus (high arch), and normal arch...
October 1, 2016: Journal of Biomechanical Engineering
Mehrdad Anbarian, Hamed Esmaeili
This study aimed to assess the effects of running-induced fatigue on plantar pressure parameters in novice runners with low and high medial longitudinal arch. Plantar pressure data from 42 novice runners (21 with high, and 21 with low arch) were collected before and after running-induced fatigue protocol during running at 3.3m/s along the Footscan(®) platform. Peak plantar pressure, peak force and force-time integral (impulse) were measured in ten anatomical zones. Relative time for foot roll-over phases and medio-lateral force ratio were calculated before and after the fatigue protocol...
July 2016: Gait & Posture
Sevgi Anar Ozdinc, Fatma Nesrin Turan
OBJECTIVE: To investigate the effects of ballet training on foot structure and the formation of the medial longitudinal arc in childhood, and the association of body mass index with structural change secondary to ballet training. METHODS: This study was conducted at Öykü Ballet and Dance School and Trakya University, Edirne, Turkey, from September 2007 to November 2008, and comprised girl students who were taking ballet classes, and a group of those who were not taking such who acted as the controls...
July 2016: JPMA. the Journal of the Pakistan Medical Association
Jarom T Bridges, Sarah T Ridge, Joseph W Myrer, Iain Hunter, Irene S Davis, Dennis L Eggett, Aaron W Johnson
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
Tun Hing Lui
A tear of the spring ligament is frequently associated with posterior tibial tendon dysfunction. Repair of the damaged spring ligament is an important component of surgical reconstruction in the treatment of posterior tibial tendon dysfunction because it is a major anatomic contributor to the integrity of the medial longitudinal arch, particularly if the dynamic support of the posterior tibial tendon is compromised. Extensive dissection is required for exposure and repair of the ligament because it is a deep-seated structure...
December 2015: Arthroscopy Techniques
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
Ulunay Kanatlı, Erdem Aktas, Haluk Yetkin
BACKGROUND: Flexible flatfoot, as the most prevalent foot deformity in pediatric population still has no standardized strategy for its management hence some orthopedic surgeons have the tendency to use orthotic devices. The objective of this study is to evaluate whether orthotic shoes effect the natural course of the developing medial longitudinal arch in children diagnosed with moderate flexible flatfoot. METHODS: Fourty-five children (33 boys and 12 girls) with moderate flexible flatfoot were enrolled in this study...
September 2016: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
R L Chimenti, A Forenza, E Previte, J Tome, D A Nawoczenski
BACKGROUND: Clinicians use the lunge position to assess and treat restricted ankle dorsiflexion. However, the individual forefoot and rearfoot contributions to dorsiflexion and the potential for abnormal compensations are unclear. The purposes of this case-control study were to 1) compare single- (representing a clinical lunge position measure) versus multi-segment contributions to dorsiflexion, and 2) determine if differences are present in patients with tendinopathy. METHODS: 32 individuals (16 with insertional Achilles tendinopathy and 16 age- and gender-matched controls) participated...
July 2016: Clinical Biomechanics
T H Lui
The mechanical integrity of the medial longitudinal arch depends on the dynamic support of muscles and the static support of ligaments. Although the posterior tibial tendon is the main dynamic stabilizer of the arch, the static structures provide the most support especially while the person is standing. After rupture of the posterior tibial tendon, the spring ligament may be compromised under increased stress and leads to talar derotation and peritalar subluxation. Surgical repair of the spring ligament has become an important adjunct to treating posterior tibial tendon abnormalities...
June 2016: Foot
Kirsty A McDonald, Sarah M Stearne, Jacqueline A Alderson, Ian North, Neville J Pires, Jonas Rubenson
Elastic energy returned from passive-elastic structures of the lower limb is fundamental in lowering the mechanical demand on muscles during running. The purpose of this study was to investigate the two length-modulating mechanisms of the plantar fascia, namely medial longitudinal arch compression and metatarsophalangeal joint (MPJ) excursion, and to determine how these mechanisms modulate strain, and thus elastic energy storage/return of the plantar fascia during running. Eighteen runners (9 forefoot and 9 rearfoot strike) performed three treadmill running trials; unrestricted shod, shod with restricted arch compression (via an orthotic-style insert), and barefoot...
2016: PloS One
K Dullaert, J Hagen, K Klos, B Gueorguiev, M Lenz, R G Richards, P Simons
BACKGROUND: Subtle hypermobility of the first tarsometatarsal joint can occur concomitantly with other pathologies and may be difficult to diagnose. Peroneus Longus muscle might influence stability of this joint. Collapse of the medial longitudinal arch is common in flatfoot deformity and the muscle might also play a role in correcting Meary's angle. METHODS: A radiolucent frame was used to simulate weightbearing during CT examination. Eight pairs fresh-frozen lower legs were imaged in neutral position under non-weightbearing (75N), weightbearing (700N) and with 15kg weights hung from Peroneus Longus tendon...
May 2016: Clinical Biomechanics
Ji-Hyun Lee, Heon-Seock Cynn, Tae-Lim Yoon, Sil-Ah Choi, Tae-Woo Kang
BACKGROUND AND OBJECTIVES: Excessive activity of the tibialis anterior muscle may be a causal mechanism in overuse injuries such as stress fracture in pes planus patients. However, information about this relationship is limited. In this study, we compared the angle of the medial longitudinal arch, the activities of the abductor hallucis and tibialis anterior muscles, and the activity ratio of tibialis anterior/abductor hallucis in individuals with pes planus and those with a neutral foot position during short-foot exercises conducted while sitting...
March 18, 2016: Journal of Back and Musculoskeletal Rehabilitation
J A D van der Woude, R J van Heerwaarden, R L A W Bleys
BACKGROUND: The purpose of this study was to investigate periosteal vessels location as intra-operative landmarks in distal femoral osteotomies and focused on the branching pattern of the vascular supply of the medial and lateral femoral condyle, its constancy, and the relationship to the height of distal femoral osteotomies. Anastomoses of relevant vessels were studied to analyze the risk of vascular insufficiency after transection of landmark vessels. METHODS: A human cadaver dissection study on the vascular supply of the medial and lateral side of the distal femur was conducted...
December 2016: Journal of Experimental Orthopaedics
Michael B Bade, Timothy L Chi, Kelly C Farrell, Amanda J Gresl, Laura J Hammel, Bradley N Koster, Ashley B Leatzow, Emily C Thomas, Thomas G McPoil
BACKGROUND: The posture of the foot has been implicated as a factor in the development of running-related injuries. A static measure of foot posture, such as the longitudinal arch angle (LAA), that can be easily performed and is predictive of the posture of the foot at midsupport while running could provide valuable information to enhance the clinician's overall evaluation of the runner. PURPOSE: The purpose of this study was to determine if the LAA, assessed in relaxed standing, could predict the posture of the foot at midsupport while running on a treadmill...
February 2016: International Journal of Sports Physical Therapy
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