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https://www.readbyqxmd.com/read/29904916/postural-control-during-reaching-while-sitting-and-general-motor-behaviour-when-learning-to-walk
#1
Anke G Boxum, Sacha La Bastide-Van Gemert, Linze-Jaap Dijkstra, Anna Furda, Heleen A Reinders-Messelink, Mijna Hadders-Algra
AIM: To study changes in muscular postural strategies and general motor behaviour during the transition to independent walking. Postural control was assessed at its two functional levels: (1) direction specificity, in which dorsal muscles are primarily activated when reaching forward; and (2) fine-tuning of direction specificity. METHOD: In an explorative longitudinal study, surface electromyograms of the arm, trunk, and neck muscles of 28 typically developing infants were recorded during reaching while sitting...
June 14, 2018: Developmental Medicine and Child Neurology
https://www.readbyqxmd.com/read/29892517/effects-of-myosin-inhibitors-on-the-x-ray-diffraction-patterns-of-relaxed-and-calcium-activated-rabbit-skeletal-muscle-fibers
#2
Hiroyuki Iwamoto
We studied the effect of myosin inhibitors, N-benzyl-p-toluenesulfonamide (BTS), blebbistatin, and butanedione monoxime (BDM) on X-ray diffraction patterns from rabbit psoas fibers under relaxing and contracting conditions. The first two inhibitors suppressed the contractile force almost completely at a 100 μM concentration, and a similar effect was obtained at 50 mM for BDM. However, still substantial changes were observed in the diffraction patterns upon calcium-activation of inhibited muscle fibers. (1) The 2nd actin layer-line reflection was enhanced normally, indicating that calcium binding to troponin and the subsequent movement of tropomyosin are not inhibited, (2) the myosin layer-line reflections became much weaker, and (3) the 1,1/1,0 intensity ratio of the equatorial reflections was increased...
2018: Biophysics and Physicobiology
https://www.readbyqxmd.com/read/29878231/caterpillar-climbing-robust-tension-based-omni-directional-locomotion
#3
Samuel C Vaughan, Huai-Ti Lin, Barry A Trimmer
Animals that must transition from horizontal to inclined or vertical surfaces typically change their locomotion strategy to compensate for the relative shift in gravitational forces. The species that have been studied have stiff articulated skeletons that allow them to redistribute ground reaction forces (GRFs) to control traction. Most also change their stepping patterns to maintain stability as they climb. In contrast, caterpillars, most of which are highly scansorial, soft-bodied, and lack rigid support or joints, can move with the same general kinematics in all orientations...
May 1, 2018: Journal of Insect Science
https://www.readbyqxmd.com/read/29875980/-uterine-inversion-about-a-case
#4
Chimae Eddaoudi, Mohammed Achraf Grohs, Abdilhay Filali
Uterine inversion is a rare but potentially serious complication of labour characterized by "glove-finger" introflexion of the uterine body protruding into the vagina or out of the vulva. This disease commonly occurs just after delivery and it is characterized by severe pain associated with hemorrhagic shock. The diagnosis is essentially based on clinical examination and must be immediate in order to allow quick reinversion before the formation of a constriction ring. Mortality rate is low if patients are early diagnosed and treated...
2018: Pan African Medical Journal
https://www.readbyqxmd.com/read/29868120/circular-rna-circsvil-promotes-myoblast-proliferation-and-differentiation-by-sponging-mir-203-in-chicken
#5
Hongjia Ouyang, Xiaolan Chen, Weimin Li, Zhenhui Li, Qinghua Nie, Xiquan Zhang
Circular RNAs (circRNAs), expressed abundantly and universally in various eukaryotes, are involved in growth and development of animals. Our previous study on circRNA sequencing revealed that circSVIL , an exonic circular, expressed differentially among skeletal muscle at 11 embryo age (E11), 16 embryo age (E16), and 1 day post-hatch (P1). In this study, we aim to investigate the effect of circSVIL on the development of skeletal muscle. We detected the expression level of circSVIL in embryonic leg muscle during E10 to P1...
2018: Frontiers in Genetics
https://www.readbyqxmd.com/read/29858062/circfgfr4-promotes-differentiation-of-myoblasts-via-binding-mir-107-to-relieve-its-inhibition-of-wnt3a
#6
Hui Li, Xuefeng Wei, Jiameng Yang, Dong Dong, Dan Hao, Yongzhen Huang, Xianyong Lan, Martin Plath, Chuzhao Lei, Yun Ma, Fengpeng Lin, Yueyu Bai, Hong Chen
Muscle development is regulated under a series of complicate processes, and non-coding RNAs, such as microRNAs (miRNAs) and circular RNAs (circRNAs), have been reported to play important roles in regulating myoblast proliferation and differentiation. We found that miR-107 expression was high in skeletal muscle of Qinchuan cattle. Overexpression of miR-107 inhibited bovine myoblasts differentiation and protected cells from apoptosis. Wnt3a was identified as a target of miR-107 by luciferase activity, real-time qPCR, and western blotting assays...
June 1, 2018: Molecular Therapy. Nucleic Acids
https://www.readbyqxmd.com/read/29846216/relational-anatomy-of-the-mimetic-muscles-and-its-implications-on-free-functional-muscle-inset-in-facial-reanimation
#7
Jorga Zabojova, Nikhitha Thrikutam, Philip Tolley, Justin Perez, Shai M Rozen, Andres Rodriguez-Lorenzo
BACKGROUND: The human smile is a complex coordinated activity of mimetic muscles predominantly recognizable by a superolateral pull at the commissure and elevation of the upper lip. The aim of this study was to revisit the muscles of facial expression responsible for these motions, evaluate their relational anatomy and orientation, and relate this to optimal positioning of free muscle transfer in smile reanimation. METHODS: Nineteen hemifaces from fresh cadaveric specimens were dissected...
May 24, 2018: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/29795746/global-active-stretching-sga%C3%A2-practice-for-judo-practitioners-physical-performance-enhancement
#8
Heleno Almeida, Raphael F DE Souza, Felipe J Aidar, Alisson G DA Silva, Ricardo P Regi, Afrânio A Bastos
In order to analyze the Global Active Stretching (SGA®) practice on the physical performance enhancement in judo-practitioner competitors, 12 male athletes from Judo Federation of Sergipe (Federação Sergipana de Judô), were divided into two groups: Experimental Group (EG) and Control Group (CG). For 10 weeks, the EG practiced SGA® self-postures and the CG practiced assorted calisthenic exercises. All of them were submitted to a variety of tests (before and after): handgrip strength, flexibility, upper limbs' muscle power, isometric pull-up force, lower limbs' muscle power (squat-jump - SJ and countermovement jump - CMJ) and Tokui Waza test...
2018: International Journal of Exercise Science
https://www.readbyqxmd.com/read/29781788/a-review-of-the-reliability-of-biomechanical-variables-produced-during-the-isometric-mid-thigh-pull-and-isometric-squat-and-the-reporting-of-normative-data
#9
Claire J Brady, Andrew J Harrison, Thomas M Comyns
The use of isometric strength testing, particularly the isometric mid-thigh pull (IMTP) has increased dramatically over the last decade. The IMTP and isometric squat (ISqT) provide one aspect of performance monitoring with variables such as peak force and rate of force development being derived from the force-time curve. The reliability of some of these variables is conflicting in the literature, and the reporting of the reliability is not standardised across the research. The majority of research only reports intraclass correlation coefficients with very few studies reporting coefficient of variation and 90% confidence intervals...
May 21, 2018: Sports Biomechanics
https://www.readbyqxmd.com/read/29771627/efficiency-and-perceived-exertion-of-novel-wheelchair-wheels-a-comparative-study
#10
Laura Sanches Rocha, Bonita Sawatzky, W Ben Mortenson
New geared wheelchair wheels have been developed allowing the user to pull backwards on the rims to move forward. Theoretically, this utilizes larger muscle groups compared to conventional propulsion preventing repetitive stress injuries. This study compared the gross mechanical efficiency (GME), perceived effort and energy expenditure of propelling the wheelchair using two types of these geared wheels and standard forward propulsion wheels. A within participants repeated measures design was used. Participants' energy expenditure and perceived exertion were measured...
May 17, 2018: Assistive Technology: the Official Journal of RESNA
https://www.readbyqxmd.com/read/29768093/alterations-in-kinematics-and-muscle-activation-patterns-with-the-addition-of-a-kipping-action-during-a-pull-up-activity
#11
Christopher Dinunzio, Nathaniel Porter, John Van Scoy, Derrick Cordice, Ryan S McCulloch
Recently, addition of a gymnastics glide kip to a standard pull-up (SPU) has resulted in the kipping pull-up (KPU). Changes in muscle activation and kinematics were evaluated with eleven athletes performing sets of 5 SPU and 5 KPU. Surface electromyography of upper body and lower body muscles was recorded along with movement kinematics obtained via markers and motion tracking software. Most kinematic variables were significantly higher in the KPU including (KPU minus SPU deg): Max hip angle (48.8° ± 6.8°, p < 0...
May 16, 2018: Sports Biomechanics
https://www.readbyqxmd.com/read/29761748/transfemoral-amputation-adductor-myodesis-using-fibertape-and-knotless-anchors
#12
Andrew R Hsu
Transfemoral amputation is considered the last treatment option for severe infection, vascular disease, trauma, and malignant tumors of the lower extremity that have failed limb salvage. Unopposed pull of the hip abductors causes a flexion-abduction thigh deformity that results in abnormal biomechanics and increased oxygen consumption during ambulation. Myodesis of the adductor tendons is a critical component of transfemoral amputation that creates dynamic muscle balance, enhances prosthetic fitting and function, and improves clinical outcomes...
May 1, 2018: Foot & Ankle International
https://www.readbyqxmd.com/read/29747053/use-of-acellular-collagen-matrix-for-the-closure-of-the-open-oral-wound-in-bone-regeneration
#13
D Stankovic, M Labudovic-Borovic, R Radosavljevic, M Marinkovic, E R Isenovic
Mucograft is collagen matrix was designed for use in open healing situations due to its compact outer layer. The technique presented in this article is an attempt to avail this attribute for covering open oral wound in guided bone regeneration (GBR) procedure. The essential idea of this technique is to avoid scoring of periosteum, submucosa and muscle layer for buccal flap advancement. Therefore, we used mucograft to cover bone substitute and barrier membrane in GBR surgical procedure. Thus, we avoided periostal-releasing incisions (PRI) and gained reposition of the flap to original level without impairing the attached keratinized gingiva...
May 7, 2018: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29684455/a-novel-extracellular-copper-zinc-superoxide-dismutase-identified-from-nibea-albiflora-and-its-characteristics-under-ammonia-nitrite-stress
#14
Xiaolong Wang, Qing Song, Zhiyong Wang, Fang Han
The cDNA of EcSOD (designated as NaEcSOD), cloned and characterized from Nibea albiflora for the first time, was 1101 bp in length including 5'-untranslated region (UTR) of 224 bp, 3' UTR of 229 bp, and an open reading frame (ORF) of 648 bp encoding a polypeptide of 215 amino acids. Based on the results of GST pull-down assay and mass spectrometric identifications, a membrane protein (annexin A4) was found to specifically bind with NaEcSOD, indicating that the two proteins might be involved in antagonizing reactive oxygen species (ROS) together...
April 21, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29677664/age-induced-changes-in-the-lower-limb-muscle-activities-during-uphill-walking-at-steep-grades
#15
Sonja Th Kwee-Meier, Alexander Mertens, Sabina Jeschke
BACKGROUND: Uphill walking is particularly challenging for elderly persons. However, there is a lack of age-differentiated studies investigating the underlying differences in muscle activation when walking on sloped surfaces. These studies are needed, e.g., for planning of evacuations of large modern cruise ships with long walking distances on often inclined surfaces. METHODS: An age-differentiated, gender-balanced study with 26 young (20-30 years) and 26 elderly people (60-77 years) was therefore conducted, investigating uphill walking at 7° and at 14° contrasted to level walking on a treadmill...
May 2018: Gait & Posture
https://www.readbyqxmd.com/read/29672352/association-of-activities-of-daily-living-with-the-load-during-step-ascent-motion-in-nursing-home-residing-elderly-individuals
#16
Mitsuhiro Masaki, Tome Ikezoe, Midori Kamiya, Kojiro Araki, Ryo Isono, Takehiro Kato, Ken Kusano, Masayo Tanaka, Syunsuke Sato, Tetsuya Hirono, Kiyoshi Kita, Tadao Tsuboyama, Noriaki Ichihashi
OBJECTIVE: This study aimed to examine the association of independence in ADL with the loads during step ascent motion and other motor functions in 32 nursing home-residing elderly individuals. DESIGN: Independence in ADL was assessed by using the functional independence measure (FIM). The loads at the upper (i.e., pulling up) and lower (i.e., pushing up) levels during step ascent task was measured on a step ascent platform. Hip extensor, knee extensor, plantar flexor muscle, and quadriceps setting strengths; lower extremity agility using the stepping test; and hip and knee joint pain severities were measured...
April 19, 2018: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/29610952/epicanthal-restoration-surgery-with-scar-excision-in-severe-epicanthal-scar
#17
Yoon Jae Chung, Mun Geun Koo, Soo Hyang Lee
BACKGROUND: Medial epicanthoplasty is a common aesthetic surgery in Asia to remove the epicanthal fold. With increasing use of this surgery, unsatisfactory results have grown. Several methods have been developed to correct it. However, there are limitations in restoration if the patient has a severe scar or does not have enough skin for reconstruction. By aggressively removing scar tissue, the authors present a better reverse redraping epicanthoplasty. METHODS: The procedure was performed on 512 patients who had complications of medial epicanthoplasty from May 2011 to October 2015...
June 2018: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/29600837/the-effects-of-functional-and-traditional-strength-training-on-different-parameters-of-strength-elderly-women-a-trial-randomized-and-controlled
#18
José C Aragão-Santos, Antônio G de Resende-Neto, Albernon Costa Nogueira, M Lourdes Feitosa-Neta, Leandro H Albuquerque Brandão, Leury M da Silva Chaves, Marzo E da Silva-Grigoletto
BACKGROUND: Physical exercise is the main strategy for improving physical fitness in elderly population. However, it is not clear which training method lead to greater adaptations on maximal dynamic strength, muscle power, muscle endurance and isometric strength in this population. Thus, our aim was to compare the effects of functional and traditional training on these variables in the elderly. METHODS: This study lasted twelve weeks, where forty-four elderly women were randomly divided into three groups: Functional (FT; n = 18); Traditional (TT; n = 15); and Control (CG; n = 11)...
March 30, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29600203/isolated-spontaneous-atraumatic-avulsion-of-lesser-trochanter-of-femur-a-pathognomonic-sign-of-malignancy-in-adults-a-case-report-and-review-of-literature
#19
Prasoon Kumar, Saurabh Agarwal, Rajesh Kumar Rajnish, Vishal Kumar, Karan Jindal
Introduction: Avulsion fractures of lesser trochanter (LT) of femur are generally seen following trauma with intertrochanteric or sub trochanteric fractures. Non-traumatic fractures of LT could oc-cur due to sudden violent contraction of the iliopsoas muscle that inserts on the LT; during vigorous exercise, or sudden pull involving flexion of hip. These are seen commonly in adolescents where the physis has not fused yet. Such a scenario in an adult patient most often or not leads to a diagnosis of an underlying malignancy or metastatic lesion...
November 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/29589046/-surgical-therapy-of-ischiofemoral-impingement-by-lateralizing-intertrochanteric-osteotomy
#20
REVIEW
C Suren, R Burgkart, I J Banke, G Hertel, J Schauwecker, R von Eisenhart-Rothe, H Gollwitzer
OBJECTIVE: Lateralizing, derotating intertrochanteric varus osteotomy to increase the ischiofemoral space to counter painful impingement of the lesser trochanter and the os ischium with resulting entrapment of quadratus femoris muscle. INDICATIONS: Symptomatic ischiofemoral impingement (IFI) caused by Coxa valga et antetorta, Coxa valga or Coxa antetorta, or a short femoral neck. CONTRAINDICATIONS: Anatomic configuration suggestive of IFI in asymptomatic patients...
April 2018: Operative Orthopädie und Traumatologie
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