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https://www.readbyqxmd.com/read/29147730/on-the-skilled-plantar-flexor-motor-action-and-unique-electromyographic-activity-of-ballet-dancers
#1
Sakiko Saito, Hiroki Obata, Mayumi Kuno-Mizumura, Kimitaka Nakazawa
The study aimed to compare the ability of dance and non-dance subjects to perform fine control of a simple heel-raising/lowering movement, and to determine if there are any differences in motor unit activity in the primary plantar flexor muscles during the movement. Subjects were instructed to accurately track a sinusoidal trace with a heel-raising and lowering movement at four controlled frequencies (1, 0.5, 0.25, and 0.125 Hz). The ankle joint angle was used to characterize movement errors from the target...
November 16, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29138448/antimicrobial-peptides-in-frog-poisons-constitute-a-molecular-toxin-delivery-system-against-predators
#2
Constantijn Raaymakers, Elin Verbrugghe, Sophie Hernot, Tom Hellebuyck, Cecilia Betti, Cindy Peleman, Myriam Claeys, Wim Bert, Vicky Caveliers, Steven Ballet, An Martel, Frank Pasmans, Kim Roelants
Animals using toxic peptides and proteins for predation or defense typically depend on specialized morphological structures, like fangs, spines, or a stinger, for effective intoxication. Here we show that amphibian poisons instead incorporate their own molecular system for toxin delivery to attacking predators. Skin-secreted peptides, generally considered part of the amphibian immune system, permeabilize oral epithelial tissue and enable fast access of cosecreted toxins to the predator's bloodstream and organs...
November 14, 2017: Nature Communications
https://www.readbyqxmd.com/read/29116433/safety-of-everolimus-plus-exemestane-in-patients-with-hormone-receptor-positive-her2-negative-locally-advanced-or-metastatic-breast-cancer-results-of-phase-iiib-ballet-trial-in-spain
#3
E Ciruelos, M Vidal, E Martínez de Dueñas, N Martínez-Jáñez, Y Fernández, J A García-Sáenz, L Murillo, F Carabantes, A Beliera, R Fonseca, J Gavilá
BACKGROUND: Everolimus with exemestane has shown promising activity in patients with hormone-receptor (HR)-positive HER2-negative endocrine-resistant advanced breast cancer. It is necessary, therefore, to characterize the safety profile of this new combination in the real-world clinical setting and in the broadest possible population. PATIENTS AND METHODS: Post-menopausal women with HR-positive HER2-negative advanced breast cancer progressing after prior non-steroidal aromatase inhibitors (NSAIs) were included...
November 7, 2017: Clinical & Translational Oncology
https://www.readbyqxmd.com/read/29112056/effects-of-a-resistance-training-intervention-on-strength-power-and-performance-in-adolescent-dancers
#4
Rebecca A Dowse, Mike R McGuigan, Craig Harrison
Dowse, RA, McGuigan, MR, and Harrison, C. Effects of a resistance training intervention on strength, power, and performance in adolescent dancers. J Strength Cond Res XX(X): 000-000, 2017-The aim of this study was to determine whether a 9-week resistance training program could have a significant effect on maximum lower-body strength and power, dynamic balance, and dance performance in adolescent dancers. Twelve competitive adolescent female dancers trained in jazz, ballet, and contemporary were recruited from local dance schools and assigned to a resistance training group (dance experience 9...
November 1, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29106341/the-long-term-impact-of-an-eating-disorder-prevention-program-for-professional-ballet-school-students-a-15-year-follow-up-study
#5
Rachel J Bar, Stephanie E Cassin, Michelle M Dionne
Eating disorder prevention programs have been assessed up to 3 years post-implementation; however, their impact on long-term resilience is unclear. The current study assessed disordered eating and body dissatisfaction in 116 dancers from a professional ballet school 15 or more years following their participation in an effective selective prevention program. Dancers who attended the ballet school during and following the program endorsed fewer thoughts and behaviours associated with bulimia, had lower lifetime prevalence of laxative use, and showed a trend toward lower lifetime rates of vomiting to control weight than those who attended the ballet school prior to the intervention...
October 2017: Eating Disorders
https://www.readbyqxmd.com/read/29106340/on-synchronicity-passing-the-torch-and-the-task-of-prevention
#6
Niva Piran
The 15-year follow-up study (Bar, Chassin & Dionne, 2017) suggests of the Dance School Ecological Prevention Program (Piran, 1999) that it may have had long-term effects on the prevention of bulimia. This pattern of findings is in line with the results of the older cohort in the original outcome evaluation study. If the results of the follow up study hold when the 15-year outcome evaluation study is compared to a control group from a similarly competitive ballet school, this would reinforce the cause of prevention in the field of sports and dance, if not beyond...
October 2017: Eating Disorders
https://www.readbyqxmd.com/read/29066410/probabilistic-assessment-method-of-the-non-monotonic-dose-responses-part-ii-robustness-assessment
#7
Grégoire Chevillotte, Audrey Bernard, Clémence Varret, Pascal Ballet, Laurent Bodin, Alain-Claude Roudot
In a previous study, we presented a new method that uses a large-scale sampling system to probabilistically assess non-monotonic dose-response curves. The statistical plausibility of the characterization was governed by the probability of the dominant category, but gave no information about the specific robustness of the curve. In this paper we propose an improvement to the method by integrating a scoring system based on 4 criteria which can be used to assess the slope robustness of each of the 10,000 sampled curves...
October 21, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29064868/association-between-previous-injury-and-risk-factors-for-future-injury-in-preprofessional-ballet-and-contemporary-dancers
#8
Sarah J Kenny, Luz Palacios-Derflingher, Qian Shi, Jackie L Whittaker, Carolyn A Emery
OBJECTIVES: To determine the prevalence of self-reported 1-year injury history and examine its association with preparticipation evaluation components aimed at predicting future injury risk (PPE-IP) among preprofessional ballet and contemporary dancers. DESIGN: Cross-sectional study. SETTING: Preprofessional ballet school, university contemporary dance program. PARTICIPANTS: Full-time preprofessional ballet and contemporary dancers...
October 20, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28988267/leg-length-in-relation-to-selected-ballet-performance-indicators
#9
C C Karpodini, M A Wyon, N Comoutos, Y Koutedakis
It is unclear whether the modern ballet body stereotype of long limbs is advantageous in dance performance. Therefore, we investigated the relationship between leg-length and selected dance movements representative of power, dexterity, and range of motion in ballet dancers at different competence levels. METHODS: The total of 10 recreational, 24 vocational, and 10 professional ballerinas volunteered. They were subjected to: a) lower limb-length measurements, b) power tests (vertical jump-sautés and unilateral countermovement jump-temps levé), c) dexterity tests (tendus and double battement frappes), and d) flexibility tests (lateral active and passive-développé à la seconde)...
September 2017: Medical Problems of Performing Artists
https://www.readbyqxmd.com/read/28988265/overuse-injuries-in-professional-anatolian-folk-dancers-a-descriptive-study-verified-with-mri
#10
Neslihan Aksu, Vefa Atansay, Taner Aksu, Şukriye Damla Kara, Safiye Koçulu, Işık Karalök
BACKGROUND: Professional dancers are artists as well as athletes who push their bodies beyond limits for aesthetic expression. Therefore, overuse injuries are common. We present our findings on overuse injuries in Anatolian (Turkish) folk dancers. METHODS: The Fire of Anatolia dance group comprises of 82 dancers (37 male, 45 female) with a mean age of 27.96±5.05 yrs (range 18 to 38). Forty-one dancers from this group presented to our clinic between February 2009 and April 2016 with complaints of pain, and 25 of them had magnetic resonance imaging (MRI) for verification...
September 2017: Medical Problems of Performing Artists
https://www.readbyqxmd.com/read/28972089/human-cd22-inhibits-murine-b-cell-receptor-activation-in-a-human-cd22-transgenic-mouse-model
#11
Kyle J Bednar, Elena Shanina, Romain Ballet, Edward P Connors, Shiteng Duan, Joana Juan, Britni M Arlian, Michael D Kulis, Eugene C Butcher, Wai-Ping Fung-Leung, Tadimeti S Rao, James C Paulson, Matthew S Macauley
CD22, a sialic acid-binding Ig-type lectin (Siglec) family member, is an inhibitory coreceptor of the BCR with established roles in health and disease. The restricted expression pattern of CD22 on B cells and most B cell lymphomas has made CD22 a therapeutic target for B cell-mediated diseases. Models to better understand how in vivo targeting of CD22 translates to human disease are needed. In this article, we report the development of a transgenic mouse expressing human CD22 (hCD22) in B cells and assess its ability to functionally substitute for murine CD22 (mCD22) for regulation of BCR signaling, Ab responses, homing, and tolerance...
November 1, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28971740/physicochemical-and-microbiological-characterization-of-human-feces-and-urine-from-composting-toilets-in-abidjan-c%C3%A3-te-d-ivoire
#12
K R Effebi, G T Ballet, M A Seka, D T Baya, B L N'takpe
We assessed the physicochemical and microbiological properties of composting toilets products in Abidjan, (Côte d'Ivoire) for their potential use in agriculture. Samples of urine and feces were collected and analysed after 123 days of storage in plastic cans (urine) and 8 months of storage in closed composting bags (feces). Selected physicochemical parameters (ammonium, phosphorus, potassium, calcium, magnesium, cadmium, copper, lead and zinc) and pathogens (bacteria and helminths eggs) were monitored. Results showed that temperature and pH values were 26...
October 3, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28969573/efficient-one-pot-access-to-trisubstituted-2-benzazepin-3-ones-as-constrained-pseudopeptide-analogues-and-privileged-scaffolds
#13
Olivier Van der Poorten, Mouhamad Jida, Dirk Tourwé, Steven Ballet
BACKGROUND: Benzazepines received great attention in the field of medicinal chemistry since this scaffold has been recognized to belong to the important family of privileged templates. More specifically, the 4-amino-1,2,4,5-tetrahydro-2-benzazepin-3-one (Aba) is used as a core structure in a variety of constrained therapeutic peptide (turn) mimetics. Most of the synthetic approaches towards this template have focused on cyclizations which form the central 7-membered azepine ring. OBJECTIVE: Previous investigations in our group allowed an expansion of the substitution patterns in the 4-amino-benzazepin-3-one scaffold by introduction of methyl substituents at positions 4 and 5 of the azepinone ring system, but also to 1-aryl substituted compounds...
October 2, 2017: Medicinal Chemistry
https://www.readbyqxmd.com/read/28936214/a-mucosal-and-cutaneous-chemokine-ligand-for-the-lymphocyte-chemoattractant-receptor-gpr15
#14
Borja Ocón, Junliang Pan, Theresa Thu Dinh, Wenjing Chen, Romain Ballet, Michael Bscheider, Aida Habtezion, Hua Tu, Brian A Zabel, Eugene C Butcher
Chemoattractants control lymphocyte recruitment from the blood, contributing to the systemic organization of the immune system. The G protein-linked receptor GPR15 mediates lymphocyte homing to the large intestines and skin. Here we show that the 9 kDa CC-motif containing cationic polypeptide AP57/colon-derived sushi containing domain-2 binding factor (CSBF), encoded by C10orf99 in the human and 2610528A11Rik in the mouse, functions as a chemokine ligand for GPR15 (GPR15L). GPR15L binds GPR15 and attracts GPR15-expressing T cells including lymphocytes in colon-draining lymph nodes and Vγ3(+) thymic precursors of dermal epithelial T cells...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28915772/hypermobility-in-adolescent-athletes-pain-functional-ability-quality-of-life-and-musculoskeletal-injuries
#15
Heidi Schmidt, Trine Lykke Pedersen, Tina Junge, Raoul Engelbert, Birgit Juul-Kristensen
Study Design Cross-sectional. Background Generalized joint hypermobility (GJH) may increase pain and likelihood of injuries and also decrease function and health-related quality of life (HRQoL) in elite-level adolescent athletes. Objective To assess the prevalence of GJH in elite-level adolescent athletes, and to study the association of GJH with pain, function, HRQoL, and musculoskeletal injuries. Methods A total of 132 elite-level adolescent athletes (36 adolescent boys, 96 adolescent girls; mean ± SD age, 14...
October 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28915093/sport-skill-specific-expertise-biases-sensory-integration-for-spatial-referencing-and-postural-control
#16
Michalis Thalassinos, Giorgos Fotiadis, Fotini Arabatzi, Brice Isableu, Vassilia Hatzitaki
The authors asked how sport expertise modulates visual field dependence and sensory reweighting for controlling posture. Experienced soccer athletes, ballet dancers, and nonathletes performed (a) a Rod and Frame test and (b) a 100-s bipedal stance task during which vision and proprioception were successively or concurrently disrupted in 20-s blocks. Postural adaptation was assessed in the mean center of pressure displacement, root mean square of center of pressure velocity and ankle muscles integrated electromyography activity...
September 15, 2017: Journal of Motor Behavior
https://www.readbyqxmd.com/read/28880595/lower-leg-and-foot-contributions-to-turnout-in-university-level-female-ballet-dancersa-preliminary-investigation
#17
Sarah L Carter, Alan R Bryant, Luke S Hopper
BACKGROUND: Turnout in ballet is produced through summation of the joint structure characteristics and ranges of motion at the hip, knee, ankle, and foot. Contributions of the hip joint to functional turnout in dancers have received extensive examination, whereas little is known about contributions from the knee, ankle, and foot. The aim of this study was to explore the nonhip components of turnout to dancers' functional turnout in first position by assessing passive external tibiofemoral rotation and active measures of foot pronation, ie, navicular drop and Foot Posture Index...
July 2017: Journal of the American Podiatric Medical Association
https://www.readbyqxmd.com/read/28871903/perfectionism-burnout-and-motivation-in-dance-a-replication-and-test-of-the-2%C3%A3-2-model-of-perfectionism
#18
Sanna M Nordin-Bates, Thomas D Raedeke, Daniel J Madigan
The relationships between multidimensional perfectionism, burnout, and motivation were examined. In so doing, this study aimed to replicate and extend the study by Cumming and Duda (2012). Ninety-one ballet dancers completed questionnaires assessing the target constructs. Using cluster analysis, four profiles emerged that replicated Cumming and Duda's findings and generally supported Gaudrau and Thompson's 2x2 model of perfectionism. As such, these profiles represented pure personal standards perfectionism, mixed perfectionism, pure evaluative concerns perfectionism, and non-perfectionism...
September 15, 2017: Journal of Dance Medicine & Science
https://www.readbyqxmd.com/read/28871902/height-of-the-medial-longitudinal-arch-during-classical-ballet-steps
#19
Carolina Cabral de Mello Viero, Luíza Pillar Kessler, Camila Pinto, Kaanda Nabilla Souza Gontijo, Rodrigo Gomes da Rosa, Ana Kleiner, Leonardo Alexandre Peyré-Tartaruga, Alexandre Severo do Pinho, Aline de Souza Pagnussat
The purpose of this study was to evaluate the midfoot longitudinal arch height and correlate it with active hip external rotation (ER) in dancers during static postures and technical steps of classical ballet (i.e., first position, demi-plié, battement fondu à la seconde, pas jeté à la seconde, and grand jeté à la seconde). A 3D motion analysis system was used for kinematic analysis. The arch height was significantly reduced during the battement fondu à la seconde, pas jeté à la seconde, and grand jeté à la seconde when compared to standing (p = 0...
September 15, 2017: Journal of Dance Medicine & Science
https://www.readbyqxmd.com/read/28871900/effects-of-a-modified-ballet-class-on-strength-and-jumping-ability-in-college-ballet-dancers
#20
Aikaterini Tsanaka, Vasiliki Manou, Spiros Kellis
The ability to jump high with precision is an important component of the ballet dancer's technique. The aim of this study was to evaluate the effect of a modified ballet class on strength and jumping ability in high level female dancers. Seventeen female ballet students were divided into two groups, experimental and control, and tested before and after an 8-week, 2 times/week intervention for peak torque of knee extensors and flexors at 60°and 180°, and jumping ability (squat jump, countermovement jump, countermovement with arm swing jump, sauté in first position, and sauté in first position with port de bras)...
September 15, 2017: Journal of Dance Medicine & Science
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