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Foot dancers

A B M Boni Rietveld, Willemijn M Diemer
This study is to draw attention to a relatively common anatomical anomaly and its possible operative treatment in dancers. The accessory navicular, or os tibiale externum, is an accessory bone on the medial side of the navicular of the foot at the insertion of the posterior tibial tendon (PTT). It can cause obvious hyperpronation, medial foot pain, and a limited and painful relevé in dancers. To the best of our knowledge, this is the first report on the operative treatment of the accessory navicular exclusively in dancers...
2016: Journal of Dance Medicine & Science
Isobel Washington, Susan Mayes, Charlotte Ganderton, Tania Pizzari
BACKGROUND: Screening and training of professional dancers is commonly based around beliefs that a large range of turnout is more advantageous in the ballet industry. This belief leads dancers who have limited hip external rotation to compensate by forcing turnout at the knee and ankle, which has been linked to injury. OBJECTIVE: To examine if there is a difference in degree of turnout between three levels of dancers (corps, soloist, principal) in a professional classical ballet company...
September 2016: Medical Problems of Performing Artists
Akiko Imura, Yoichi Iino
The purpose of this study was to investigate the effect of hip external rotation (turnout) on lower limb kinetics during vertical jumps by classical ballet dancers. Vertical jumps in a turnout (TJ) and a neutral hip position (NJ) performed by 12 classical female ballet dancers were analysed through motion capture, recording of the ground reaction forces, and inverse dynamics analysis. At push-off, the lower trunk leaned forward 18.2° and 20.1° in the TJ and NJ, respectively. The dancers jumped lower in the TJ than in the NJ...
July 14, 2016: Sports Biomechanics
Jessica Meier, Marlene Sofie Topka, Jürgen Hänggi
It is known that intensive training and expertise are associated with functional and structural neuroadaptations. Most studies, however, compared experts with nonexperts; hence it is, specifically for sports, unclear whether the neuroplastic adaptations reported are sport-specific or sport-general. Here we aimed at investigating sport-specific adaptations in professional handball players and ballet dancers by focusing on the primary motor and somatosensory grey matter (GM) representation of hands and feet using voxel-based morphometry as well as on fractional anisotropy (FA) of the corticospinal tract by means of diffusion tensor imaging-based fibre tractography...
2016: Neural Plasticity
Nili Steinberg, Israel Hershkovitz, Aviva Zeev, Bruce Rothschild, Itzhak Siev-Ner
BACKGROUND: Joint range of motion (ROM) refers to the extent of movement of the joint, recorded using standard goniometers. Joint hypermobility (JHM) is a condition in which most of the synovial joints move beyond the "normal" limits. Joint hypermobility is recognized as a feature of heritable disorders of the connective tissue and can be identified mostly by the Beighton scale. Data on the possible relationship between JHM and joint ROM are lacking in the literature. The main objective of the present study was to evaluate the relationship between JHM and joint ROM in the different lower-extremity joints in young dancers...
June 2016: Journal of Clinical Rheumatology: Practical Reports on Rheumatic & Musculoskeletal Diseases
Antonino Casabona, Giuseppa Leonardi, Ettore Aimola, Giovanni La Grua, Cristina Maria Polizzi, Matteo Cioni, Maria Stella Valle
BACKGROUND AND AIM: Learning highly specialized upright postures may be of benefit for more common as well as for novel stances. In this study, we asked whether this generalization occurs with foot configurations previously trained or depends on a generic increase in balance difficulty. We also explored the possibility that the benefit may concern not only the level of postural performance but also the structural organization of the upright standing. METHODS: Ten elite professional ballet dancers were compared to ten untrained subjects, measuring the motion of the center of pressure (COP) across a set of five stances with different foot configurations...
May 2016: Gait & Posture
Antonia M Zaferiou, Rand R Wilcox, Jill L McNitt-Gray
This study determined how dancers regulated angular and linear impulse during the initiation of pirouettes of increased rotation. Skilled dancers (n = 11) performed single and double pirouette turns with each foot supported by a force plate. Linear and angular impulses generated by each leg were quantified and compared between turn types using probability-based statistical methods. As rotational demands increased, dancers increased the net angular impulse generated. The contribution of each leg to net angular impulse in both single and double pirouettes was influenced by stance configuration strategies...
October 2016: Journal of Applied Biomechanics
Prem N Ramkumar, Joseph Farber, Johnny Arnouk, Kevin E Varner, Patrick C Mcculloch
Ballet dancers are high-performance athletes who are particularly susceptible to a wide variety of musculoskeletal injuries. However, they are relatively understudied, and data on their injury rates are lacking. This retrospective study features the largest aggregate data on professional ballet dancers to date and aims to identify the most common diagnoses and areas of injury in this unique population to better direct preventative and clinical practices. The study encompassed a 10-year period from January 2000 to December 2010 of dancers from a single company...
March 2016: Journal of Dance Medicine & Science
Eliza Hafiz, Claire E Hiller, Leslie L Nicholson, Elizabeth J Nightingale, Alison Grimaldi, Kathryn M Refshauge
Low range femoral torsion, termed "lateral shaft torsion," has been associated with greater range of hip external rotation and turnout in dancers. It is also hypothesized that achieving greater turnout at the hip minimizes torsion at the knee, shank, ankle, and foot, and consequently reduces incidence of lower limb injuries. The primary aims of this study were to investigate: 1. differences in range of femoral shaft torsion between dancers with and without lower limb injuries; and 2. the relationship between femoral shaft torsion, hip external rotation range, and turnout...
March 2016: Journal of Dance Medicine & Science
Amy E Quanbeck, Jeffrey A Russell, Sara C Handley, Deborah S Quanbeck
Turnout, or external rotation (ER) of the lower extremities, is essential in ballet. The purpose of this study was to utilise physical examination and a biomechanical method for obtaining functional kinematic data using hip and knee joint centres to identify the relative turnout contributions from hip rotation, femoral anteversion, knee rotation, tibial torsion, and other sources. Ten female dancers received a lower extremity alignment assessment, including passive hip rotation, femoral anteversion, tibial torsion, weightbearing foot alignment, and Beighton hypermobility score...
March 25, 2016: Journal of Sports Sciences
Paula M Di Nota, Gabriella Levkov, Rachel Bar, Joseph F X DeSouza
The lateral occipitotemporal cortex (LOTC) is comprised of subregions selectively activated by images of human bodies (extrastriate body area, EBA), objects (lateral occipital complex, LO), and motion (MT+). However, their role in motor imagery and movement processing is unclear, as are the influences of learning and expertise on its recruitment. The purpose of our study was to examine putative changes in LOTC activation during action processing following motor learning of novel choreography in professional ballet dancers...
July 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
Akos Csonka, Eakachit Sikarinkul, Istvan Gargyan, Kristof Boa, Endre Varga
Differentiation between the normal variant cleft epiphysis and Salter-Harris type III fracture of the first proximal phalanges of the foot in children might be challenging. The authors describe a case of a 10-year-old ballet dancer girl with bilateral epiphyseal segmentation of the first proximal phalanges of the foot, unresponsive to conservative treatment. Considered a nonhealing stress-induced fracture, operative treatment with closed reduction and Herbert screw insertion was chosen on both sides. Complete union was achieved, with significant reduction of pain...
July 2016: Journal of Pediatric Orthopedics. Part B
José M Castillo-López, Pedro V Munuera-Martínez, Cristina Algaba-Guisado, María Reina-Bueno, Nadia Salti-Pozo, Alfonso Vargas-Macías
BACKGROUND: The foot is the main element of artistic creation in flamenco dancing. At the professional level, the foot undergoes high musculoskeletal demands, predisposing the development of podiatric pathologic disorders in this group. The principal objective of this study was to determine the most common foot lesions in professional female flamenco dancers. METHODS: In a cross-sectional observational study of 44 female professional flamenco dancers, the participants completed a short questionnaire about their demographic features, number of hours danced per week, and years of professional activity...
January 2016: Journal of the American Podiatric Medical Association
Razia Rehmani, Yoshimi Endo, Phillip Bauman, William Hamilton, Hollis Potter, Ronald Adler
BACKGROUND: Altered biomechanics from repetitive microtrauma, such as long practice hours in en pointe (tip of the toes) or demi pointe (balls of the feet) predispose ballet dancers to a multitude of musculoskeletal pathologies particularly in the lower extremities. Both ultrasound and magnetic resonance imaging (MRI) are radiation-sparing modalities which can be used to confidently evaluate these injuries, with ultrasound (US) offering the added utility of therapeutic intervention at the same time in experienced hands...
October 2015: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
Danielle N Jarvis, Kornelia Kulig
Due to the significant amount of time dancers spend on the forefoot, loads on the metatarsophalangeal joints are likely high, yet vary between dance movements. The purpose of this study was to compare joint motion and net joint moments at the metatarsophalangeal joints during three different dance movements ranging in demands at the foot and ankle joints. Ten healthy, female dancers (27.6 ± 3.2 years; 56.3 ± 6.9 kg; 1.6 ± 0.1 m) with an average 21.7 ± 4.9 years of dance training performed relevés (rising up onto the toes), sautés (vertical bipedal jumps), and saut de chat leaps (split jumps involving both vertical and horizontal components)...
September 2016: Journal of Sports Sciences
Preston J Smith, Brayden J Gerrie, Kevin E Varner, Patrick C McCulloch, David M Lintner, Joshua D Harris
BACKGROUND: Most published studies on injuries in the ballet dancer focus on the lower extremity. The rigors of this activity require special training and care. By understanding prevalence and injury pattern to the musculoskeletal system, targeted prevention and treatment for this population can be developed. PURPOSE: To determine the incidence and prevalence of musculoskeletal injuries in ballet. STUDY DESIGN: Systematic review; Level of evidence, 4...
July 2015: Orthopaedic Journal of Sports Medicine
Timothy Charlton, Chelsea Boe, David B Thordarson
Chronic Lisfranc injury is a subtle and severe injury in high-level athletes, including dancers. This patient population is generally intolerant of intra-articular screw fixation and can develop significant post-traumatic arthritis with potentially career ending complications. Flexible fixation with suture-button devices provides potential restoration of physiologic motion at the joint, with appropriate support for healing that may facilitate return to en pointe activities for dancers. We hypothesized that the suture-button device would restore motion at the Lisfranc joint and allow for return to activities in this particular population without the limitations and complications of rigid fixation...
December 2015: Journal of Dance Medicine & Science
Jeffrey A Russell, Hiroshi Yoshioka
BACKGROUND: The en pointe position of the ankle in ballet is extreme. Previously, magnetic resonance imaging (MRI) of ballet dancers' ankles en pointe was confined to a low field, open MR device. PURPOSE: To develop a reproducible ankle MRI protocol for ballet dancers en pointe and to assess the positions of the key structures in the dancers ankles. MATERIAL AND METHODS: Six female ballet dancers participated; each was randomly assigned to stand en pointe while one of her feet and ankles was splinted with wooden rods affixed with straps or to begin with the ankle in neutral position...
August 2016: Acta Radiologica
Sasha Carsen, Bridget J Quinn, Elizabeth Beck, Heather Southwick, Lyle J Micheli
A 26-year-old female professional dancer sustained an acute injury to her mid-foot during a performance of The Nutcracker. An intra-articular, comminuted, minimally displaced fracture of the cuboid was found. The patient was treated non-operatively with cast and boot immobilization, modified weightbearing, and progressive rehabilitation. She was able to return to professional dance at 6 months post-injury and continues to dance professionally over 1 year out from injury without issue. The unique demands of classical ballet, especially dancing en pointe, increase the risk for mid-foot fractures, and clinicians should have a high-index of suspicion in dancers suffering an acute injury to the foot and ankle with greater than expected pain or swelling...
September 2015: Journal of Dance Medicine & Science
Andrea Stracciolini, Amy X Yin, Dai Sugimoto
INTRODUCTION: Improving knowledge regarding injuries sustained by pediatric dancers is important in order to better understand injury risk. The aim of this study is to analyze dance injury etiology and body area by age in a cohort of young female dancers presenting to a pediatric sports/dance medicine clinic. METHODS: The cross-sectional epidemiological study of a 5% probability sample of dancers evaluated between 1/1/2000 and 12/31/2009 with a musculoskeletal injury requiring physician evaluation...
November 2015: Physician and Sportsmedicine
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