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https://www.readbyqxmd.com/read/28740756/sonographic-evaluation-of-the-immediate-effects-of-eccentric-heel-drop-exercise-on-achilles-tendon-and-gastrocnemius-muscle-stiffness-using-shear-wave-elastography
#1
Wilson K C Leung, K L Chu, Christopher Lai
BACKGROUND: Mechanical loading is crucial for muscle and tendon tissue remodeling. Eccentric heel drop exercise has been proven to be effective in the management of Achilles tendinopathy, yet its induced change in the mechanical property (i.e., stiffness) of the Achilles tendon (AT), medial and lateral gastrocnemius muscles (MG and LG) was unknown. Given that shear wave elastography has emerged as a powerful tool in assessing soft tissue stiffness with promising intra- and inter-operator reliability, the objective of this study was hence to characterize the stiffness of the AT, MG and LG in response to an acute bout of eccentric heel drop exercise...
2017: PeerJ
https://www.readbyqxmd.com/read/28739462/suprageniculate-approach-to-release-of-popliteal-entrapment-without-distal-bypass-despite-preoperative-runoff-thrombosis
#2
Aamna M Ali, Christopher R Ramos, Natalia O Glebova
INTRODUCTION: Popliteal artery entrapment syndrome is an uncommon condition in which anatomic or functional popliteal artery compression causes arterial insufficiency. We present a case of popliteal entrapment with runoff thrombosis treated with suprageniculate release of entrapment without distal bypass. CASE PRESENTATION: A 15-year old boy with Klinefelter syndrome presented with right leg claudication severely limiting his activity. He had a palpable femoral pulse, but no palpable popliteal or foot pulses on the right...
July 21, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28738725/seeding-nerve-sutures-with-minced-nerve-graft-mine-g-a-simple-method-to-improve-nerve-regeneration-in-rats
#3
Salvatore D'Arpa, Giovanni Zabbia, Carla Cannizzaro, Grazia Salimbeni, Fulvio Plescia, Alessio Vincenzo Mariolo, Giovanni Cassata, Luca Cicero, Roberto Puleio, Anna Martorana, Francesco Moschella, Adriana Cordova
BACKGROUND: The aim of this study was to assess the effect of seeding the distal nerve suture with nerve fragments in rats. METHODS: On 20 rats, a 15 mm sciatic nerve defect was reconstructed with a nerve autograft. In the Study Group (10 rats), a minced 1 mm nerve segment was seeded around the nerve suture. In the Control Group (10 rats), a nerve graft alone was used. At 4 and 12 weeks, a walking track analysis with open field test (WTA), hystomorphometry (number of myelinated fibers (n), fiber density (FD) and fiber area (FA) and soleus and gastrocnemius muscle weight ratios (MWR) were evaluated...
July 25, 2017: Acta Chirurgica Belgica
https://www.readbyqxmd.com/read/28736326/tone-inhibiting-insoles-enhance-the-reciprocal-inhibition-of-ankle-plantarflexors-of-post-stroke-hemiparetic-subjects-an-electromyographic-study
#4
Nobushige Takahashi, Hidetoshi Takahashi, Osamu Takahashi, Ryosuke Ushijima, Rie Umebayashi, Junji Nishikawa, Yasutomo Okajima
BACKGROUND: Spasticity is a common sequela of upper motor neuron pathology, such as cerebrovascular diseases and cerebral palsy. Intervention for spasticity of the ankle plantarflexors in physical therapy may include tone-inhibiting casting and/or orthoses for the ankle and foot. However, the physiological mechanism of tone reduction by such orthoses remains unclarified. OBJECTIVE: To investigate the electrophysiologic effects of tone-inhibiting insoles in stroke subjects with hemiparesis by measuring changes in reciprocal Ia inhibition (RI) in the ankle plantarflexor...
July 20, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/28736080/the-effect-of-ankle-foot-orthosis-alignment-on-walking-in-individuals-treated-for-traumatic-lower-extremity-injuries
#5
Starr E Brown, Elizabeth Russell Esposito, Jason M Wilken
Limb salvage surgeries are performed to treat a variety of lower limb pathologies and traumatic injuries. Individuals who have undergone limb salvage surgeries may require an ankle foot orthosis (AFO) to compensate for limb impairments and restore walking ability. Understanding the effects of AFO design parameters on gait biomechanics is important to refine AFO prescription criteria. In this study sagittal plane kinematic and kinetic data, muscle activity and alignment preference were examined as individuals treated for traumatic lower extremity injuries (N=12) walked over level ground with Plantarflexed (PF), Neutral, and Dorsiflexed (DF) aligned AFOs...
July 5, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28733091/histological-analysis-of-the-association-of-low-level-laser-therapy-and-platelet-rich-plasma-in-regeneration-of-muscle-injury-in-rats
#6
Thiago Alves Garcia, Regina Celi Trindade Camargo, Tatiana Emy Koike, Guilherme Akio Tamura Ozaki, Robson Chacon Castoldi, José Carlos Silva Camargo Filho
OBJECTIVE: Muscle injuries are common, and their treatment requires costs and time off. Platelet rich plasma and low level laser therapy have been shown to be affordable and easy to use. The aim of this study was to evaluate the associated effects of low level laser therapy and platelet rich plasma on the treatment of the soleus muscle injured by strain in rats. METHODS: Thirty-five rats were randomly allocated into five groups: Control (C), Injury Control (IC), injury PRP (IP), injury LLLT (ILT) and injury LLLT and PRP (ILTP)...
July 4, 2017: Brazilian Journal of Physical Therapy
https://www.readbyqxmd.com/read/28732761/the-use-of-intermuscular-coherence-analysis-as-a-novel-approach-to-detect-age-related-changes-on-postural-muscle-synergy
#7
Adriana M Degani, Charles T Leonard, Alessander Danna-Dos-Santos
The overall goal of this study was to investigate potential adaptations brought about by the natural processes of aging on the coordination of postural muscles. Considering the progressive and non-homogeneous deterioration of sensorimotor and neuromuscular systems as the individual grows older, it was hypothesized that aging is associated with a reorganization of synergistic mechanisms controlling postural muscles. Therefore, the presence, distribution, and strength of correlated neural inputs to three posterior postural muscles were measured by intermuscular coherence estimations at a low frequency band (0-55Hz)...
July 18, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28730836/effects-of-rapid-or-slow-body-weight-reduction-on-intramuscular-protein-degradation-pathways-during-equivalent-weight-loss-on-rats
#8
Y Nonaka, S Urashima, M Inai, S Nishimura, K Higashida, S Terada
The purpose of this study was to compare the effects of short-term fasting-induced rapid weight loss with those of slower but equivalent body weight loss induced by daily calorie restriction on muscle protein degradation pathways and muscle protein content. Male Fischer rats were subjected to either 30 % calorie restriction for 2 weeks to slowly decrease body weight (Slow) or 3-day fasting to rapidly decrease body weight by a comparable level of that of the Slow group (Rapid). The final body weights were about 15 % lower in both the Slow and Rapid groups than in the Con group (p<0...
July 18, 2017: Physiological Research
https://www.readbyqxmd.com/read/28730826/effect-of-carcinogen-1-2-dimethylhydrazine-treatment-on-fibre-types-in-skeletal-muscles-of-male-wistar-rats
#9
V Smerdu, M Perše
The cancerogen 1,2-dimethylhydrazine (DMH), widely used in the experimental animal model of carcinogenesis, affects various organs, but its effect on muscle fibres is unknown. To evaluate the effect of 15-week DMH treatment on the fibre size and myosin heavy chain (MyHC) isoforms, which substantially determine fibre types and their contractile characteristics, pure and hybrid fibre types were immunohistochemically determined according to the MyHC isoform expression in soleus, extensor digitorum longus, gastrocnemius medialis and lateralis muscles of DMH-treated and control male Wistar rats...
July 18, 2017: Physiological Research
https://www.readbyqxmd.com/read/28728791/the-effects-of-achilles-tendon-compliance-on-triceps-surae-mechanics-and-energetics-in-walking
#10
Maria Isabel V Orselli, Jason R Franz, Darryl G Thelen
Achilles tendon (AT) compliance can affect the generation and transmission of triceps surae muscle forces, and thus has important biomechanical consequences for walking performance. However, the uniarticular soleus (SOL) and the biarticular (GAS) function differently during walking, with in vivo evidence suggesting that their associated fascicles and tendinous structures exhibit unique kinematics during walking. Given the strong association between muscle fiber length, velocity and force production, we conjectured that SOL and GAS mechanics and energetic behavior would respond differently to altered AT compliance...
June 29, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28726101/eukaryotic-elongation-factor-2-kinase-activation-in-m-soleus-under-14-day-hindlimb-unloading-of-rats
#11
Y N Lomonosova, S P Belova, T M Mirzoev, I B Kozlovskaya, B S Shenkman
Functional unloading of m. soleus of male Wistar rats was found to cause a reduction in protein synthesis. The level of phosphorylation of the translation elongation factor 2 (eEF2) and the eEF2 kinase (eEF2k) activity in m. soleus after 14 days of unloading were assessed. Rats were divided into the control group (C) and the group with hindlimb unloading for 14 days (HU14). The level of eEF2 phosphorylation in group HU14 was 80%, whereas in the control is was 40%. The indices of eEF2k expression and protein content in group HU14 increased compared to group C...
May 2017: Doklady. Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28725191/bilateral-reflex-fluctuations-during-rhythmic-movement-of-remote-limb-pairs
#12
Rinaldo A Mezzarane, Tsuyoshi Nakajima, E Paul Zehr
The modulation of spinal cord excitability during rhythmic limb movement reflects the neuronal coordination underlying actions of the arms and legs. Integration of network activity in the spinal cord can be assessed by reflex variability between the limbs, an approach so far very little studied. The present work addresses this question by eliciting Hoffmann (H-) reflexes in both limbs to assess if common drive onto bilateral pools of motoneurons influence spinal cord excitability simultaneously or with a delay between sides...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28723790/relationship-of-medial-gastrocnemius-relative-fascicle-excursion-and-ankle-joint-power-and-work-performance-during-gait-in-typically-developing-children-a-cross-sectional-study
#13
Teresa Martín Lorenzo, Gustavo Albi Rodríguez, Eduardo Rocon, Ignacio Martínez Caballero, Sergio Lerma Lara
Muscle fascicles lengthen in response to chronic passive stretch through in-series sarcomere addition in order to maintain an optimum sarcomere length. In turn, the muscles' force generating capacity, maximum excursion, and contraction velocity is enhanced. Thus, longer fascicles suggest a greater capacity to develop joint power and work. However, static fascicle length measurements may not be taking sarcomere length differences into account. Thus, we considered relative fascicle excursions through passive ankle dorsiflexion may better correlate with the capacity to generate joint power and work than fascicle length...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28720233/the-effect-of-reflexology-upon-spasticity-and-function-among-children-with-cerebral-palsy-who-received-physiotherapy-three-group-randomised-trial
#14
Filiz Özkan, Handan Zincir
PURPOSE: To assess the effectiveness of reflexology method upon spasticity and function among children with cerebral palsy who received physiotherapy. METHODS: A three group, randomised trial with blinded evaluator. Randomization was made sealed and opaque envelopes. 45 children with cerebral palsy who were trained at a Special Education and Rehabilitation Centre. In the reflexology and placebo group; a 20min reflexology was performed twice a week in a total 24 sessions...
August 2017: Applied Nursing Research: ANR
https://www.readbyqxmd.com/read/28720001/differential-effects-of-heat-stress-on-fibre-capillarisation-in-tenotomised-soleus-and-plantaris-muscles
#15
Muthita Hirunsai, Ratchakrit Srikuea
PURPOSE: Capillary regression is commonly observed in response to disuse muscle atrophy. Heat stress is known to alleviate muscle atrophy, while effect of heat exposure on capillary adaptation following disuse atrophy is not defined. Here, we examined the effect of heat treatment on capillarisation and the associated signalling in slow-oxidative soleus and fast-glycolytic plantaris muscles following Achilles tendon ablation (tenotomy). MATERIALS AND METHODS: Male Wistar rats were assigned into control (CON), control with heat stress (CON + HEAT), tenotomy (TEN) and tenotomy with heat stress (TEN + HEAT) groups...
July 18, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28719339/modulation-of-oxidative-and-glycolytic-skeletal-muscle-fibers-na-h-exchanger1-nhe1-and-na-hco3-co-transporter1-nbc1-genes-and-proteins-expression-in-type-2-diabetic-rat-streptozotocin-high-fat-diet-following-long-term-endurance-training
#16
A Monazzami, H Rajabi, R Ghrakhanlou, K Yari, Z Rahimi
Diabetes is known to alter both oxidative and glycolytic pathways in a fiber type-dependent manner. The aim of present study was to investigate the effects of endurance training on muscle NHE1 and NBC1 genes and proteins expression in type 2 diabetic rats. Male wistar rats (n=30), 4 weeks old and 95.7±10.8g, were randomly selected and divided into control, diabetic without training and diabetic with training groups. Diabetes was induced by injection of low dose of streptotozin and feeding with high-fat diet...
May 20, 2017: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/28717613/morphometric-evaluation-of-human-tendocalcaneus-a-cadaveric-study-of-south-indian-male-population
#17
Naveen Kumar, Ashwini P Aithal, Satheesha B Nayak, Jyothsna Patil, Abhinitha Padavinangadi, Biswa Bina Ray
INTRODUCTION: Tendocalcaneus or Achilles tendon is formed by the fusion of the tendons of gastrocnemius and soleus muscles. Normal morphometric measurements of tendo-calcaneus serves an important landmark in its anthropometric evaluation and biomechanical characteristics. Hence the objective of this study was to provide detailed morphometric profile of tendocalcaneus in south indian cadaveric male population. MATERIALS AND METHOD: A total of 64 dissected adult limbs was studied...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28715885/the-effects-of-exercise-and-cold-exposure-on-mitochondrial-biogenesis-in-skeletal-muscle-and-white-adipose-tissue
#18
Nana Chung, Jonghoon Park, Kiwon Lim
PURPOSE: The purpose of this study was to determine whether exercise or/and cold exposure regulate mitochondria biogenesis-related gene expression in soleus and inguinal adipose tissue of mice. METHODS: Forty ICR 5-week old male mice were divided into four groups: thermoneutrality-untrained (23 ± 1 °C in room temperature, n=10), cold-water immersion (24 ± 1 °C, n=10), exercise in neutral temperature (34 ± 1 °C, n=10), and exercise in cold temperature (24 ± 1 °C, n=10)...
June 30, 2017: Journal of Exercise Nutrition & Biochemistry
https://www.readbyqxmd.com/read/28713456/post-activation-potentiation-of-the-plantarflexors-implications-of-knee-angle-variations
#19
Paulo Gago, Anton Arndt, Maria M Ekblom
Flexing the knee to isolate the single joint soleus from the biarticular gastrocnemius is a strategy for investigating individual plantarflexor's post activation potentiation (PAP). We investigated the implications of testing plantarflexor PAP at different knee angles and provided indirect quantification of the contribution of gastrocnemius potentiation to the overall plantarflexor enhancements post conditioning. Plantarflexor supramaximal twitches were measured in ten male power athletes before and after a maximal isometric plantarflexion (MVIC) at both flexed and extended knee angles...
June 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28710834/ultrastructure-of-skeletal-muscles-in-mice-lacking-muscle-specific-vegf-expression
#20
Oliver Baum, Lena Jentsch, Adolfo Odriozola, Stefan A Tschanz, I Mark Olfert
Vascular endothelial growth factor-A (VEGF) influences several physiological processes including endothelial cell function and maintenance of organ/tissue capillarity. While the functional aspects of VEGF were vigorously investigated, only little detail is known on structural integrity of skeletal muscle fibers and capillaries in mice lacking VEGF expression in their muscles. Therefore, we assessed systematically the architecture of the glycolytic plantaris and the oxidative soleus muscles obtained from muscle-specific VEGF knockout (mVEGF-KO, n=7) mice and their wild-type (WT, n=7) littermates by morphometry after transmission electron microscopy...
July 15, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
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