The Experts below are selected from a list of 2607 Experts worldwide ranked by ideXlab platform
William Z Rymer - One of the best experts on this subject based on the ideXlab platform.
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soleus h reflex excitability changes in response to sinusoidal Hip stretches in the injured human spinal cord
Neuroscience Letters, 2007Co-Authors: Maria Knikou, Brian D Schmit, Debjani Chaudhuri, Elizabeth Kay, William Z RymerAbstract:Imposed static Hip stretches substantially modulate the soleus H-reflex in people with an intact or injured spinal cord while stretch of the Hip Flexors affect the walking pattern in lower vertebrates and humans. The aim of this study was to assess the effects of dynamic Hip stretches on the soleus H-reflex in supine spinal cord injured (SCI) subjects. Sinusoidal movements were imposed on the right Hip joint at 0.2 Hz by a Biodex system. H-reflexes from the soleus muscle were recorded as the leg moved in flexion or extension. Stimuli were sent only once in every Hip movement cycle that each lasted 5 s. Torque responses were recorded at the Hip, knee, and ankle joints. A Hip phase-dependent soleus H-reflex modulation was present in all subjects. The reflex was facilitated during Hip extension and suppressed during Hip flexion. There were no significant differences in pre- or post-stimulus soleus background activity between the two conditions. Oscillatory responses were present as the Hip was maximally flexed. Sinusoidal Hip stretches modulated the soleus H-reflex in a manner similar to that previously observed following static Hip stretches. The amount of reflex facilitation depended on the angle of Hip extension. Further research is needed on the afferent control of spinal reflex pathways in health and disease in order to better understand the neural control of movement in humans. This will aid in the development of rehabilitation strategies to restore motor function in these patients.
Nicol C Voermans - One of the best experts on this subject based on the ideXlab platform.
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involvement of pelvic girdle and proximal leg muscles in early oculopharyngeal muscular dystrophy
Neuromuscular Disorders, 2017Co-Authors: B M Van Der Sluijs, Saskia Lassche, G J Knuiman, Benno Kusters, Arend Heerschap, Maria T E Hopman, Tim H A Schreuder, B G M Van Engelen, Nicol C VoermansAbstract:Although limb girdle weakness is not part of the major diagnostic criteria of oculopharyngeal muscular dystrophy (OPMD), it has frequently been observed in the Dutch and other OPMD cohorts. In the Dutch cohort, this might be related to the relatively old age or the severity of the genetic defect. This patient-control study (14 OPMD patients and 12 controls) investigated the involvement of limb girdle muscles with a multidimensional approach in early OPMD. We assessed functional abilities, disease impact, physical activity, muscle strength, histopathology and fatty infiltration using questionnaires, actometer, functional tests, manual and quantitative muscle testing, muscle biopsy and muscle MRI. The study showed that involvement of pelvic girdle and proximal leg can be a relatively early feature of OPMD, resulting in impaired daily life activities. The fat fraction of the Hip adductors and hamstrings was significantly higher in OPMD patients than in controls. Future studies should include assessment of Hip Flexors, Hip adductors and hamstrings (muscle strength measurements and MRI), functional tests and questionnaires. These findings are important in future diagnostics, management and for the design of outcome measures in trials.
Hiroshi Yamasaki - One of the best experts on this subject based on the ideXlab platform.
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test retest reliability of isometric leg muscle strength measurements made using a hand held dynamometer restrained by a belt comparisons during and between sessions
Journal of Physical Therapy Science, 2009Co-Authors: Munenori Katoh, Hiroshi YamasakiAbstract:[Purpose] The aim of this study was to evaluate the test-retest reliability of isometric muscle strength measurements made using a hand-held dynamometer restrained by a belt. [Subjects] The subjects were 37 healthy adults (18 men and 19 women) with a mean age of 21.9 years. [Methods] Measurements were made on the dominant leg using a hand-held dynamometer (μTas MF-01 or F-1, Anima Corp., Tokyo) and a belt to fix the position of the body part under test. The strengths of the following 10 muscle groups were evaluated: Flexors, extensors, abductors, adductors, internal rotators and external rotators of the Hip; Flexors and extensors of the knee; and dorsiFlexors and plantar Flexors of the ankle. Each measurement was repeated after at least 30 seconds of rest in three sessions: in the morning, in the afternoon on the same day, and one week later. [Results] The intraclass correlation coefficient (ICC) for the first and second sets of measurements made in each session ranged from 0.75 to 0.97. ICC for the highest measurements of each muscle group in each of the three sessions ranged from 0.56 to 0.91. [Conclusions] The test-retest reliability of isometric muscle strength measurements of the lower limb made using a hand-held dynamometer equipped with a stabilizing belt varies widely, depending on the muscle action tested, and it would be better to repeat the measurements on different occasions.
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test retest reliability of isometric leg muscle strength measurements made using a hand held dynamometer restrained by a belt comparisons during and between sessions
Journal of Physical Therapy Science, 2009Co-Authors: Munenori Katoh, Hiroshi YamasakiAbstract:[Purpose] The aim of this study was to evaluate the test-retest reliability of isometric muscle strength measurements made using a hand-held dynamometer restrained by a belt. [Subjects] The subjects were 37 healthy adults (18 men and 19 women) with a mean age of 21.9 years. [Methods] Measurements were made on the dominant leg using a hand-held dynamometer (μTas MF-01 or F-1, Anima Corp., Tokyo) and a belt to fix the position of the body part under test. The strengths of the following 10 muscle groups were evaluated: Flexors, extensors, abductors, adductors, internal rotators and external rotators of the Hip; Flexors and extensors of the knee; and dorsiFlexors and plantar Flexors of the ankle. Each measurement was repeated after at least 30 seconds of rest in three sessions: in the morning, in the afternoon on the same day, and one week later. [Results] The intraclass correlation coefficient (ICC) for the first and second sets of measurements made in each session ranged from 0.75 to 0.97. ICC for the highest measurements of each muscle group in each of the three sessions ranged from 0.56 to 0.91. [Conclusions] The test-retest reliability of isometric muscle strength measurements of the lower limb made using a hand-held dynamometer equipped with a stabilizing belt varies widely, depending on the muscle action tested, and it would be better to repeat the measurements on different occasions.
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comparison of reliability of isometric leg muscle strength measurements made using a hand held dynamometer with and without a restraining belt
Journal of Physical Therapy Science, 2009Co-Authors: Munenori Katoh, Hiroshi YamasakiAbstract:[Purpose] The aim of this study was to evaluate whether using a belt to restrain a hand-held dynamometer improves reliability of isometric leg muscle strength measurements in healthy subjects. [Subjects] Twenty to 44 healthy subjects participated in the test. [Methods] Two raters, one man and one woman, used a hand-held dynamometer with or without a restraining belt to measure the isometric strengths of the following muscle groups: Flexors, extensors, abductors, adductors, internal rotators and external rotators of the Hip; Flexors and extensors of the knee; and dorsiFlexors and plantar Flexors of the ankle. [Results] The intraclass correlation coefficient, used to describe interrater agreement, ranged from 0.97 to 0.99 with the belt and from 0.21 to 0.88 without the belt. Pearson's correlation coefficient for measurements with versus without the belt ranged from 0.61 to 0.95 for the man and from 0.31 to 0.87 for the woman. [Conclusion] The interrater reliability of isometric leg muscle strength measurements was improved by use of a belt to restrain the hand-held dynamometer.
Luis Javier Chirosa - One of the best experts on this subject based on the ideXlab platform.
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absolute reliability and concurrent validity of hand held dynamometry and isokinetic dynamometry in the Hip knee and ankle joint systematic review and meta analysis
Open Medicine, 2017Co-Authors: Claudio Chamorro, Susan Armijoolivo, Carlos De La Fuente, J Fuentes, Luis Javier ChirosaAbstract:The purpose of the study is to establish absolute reliability and concurrent validity between hand-held dynamometers (HHDs) and isokinetic dynamometers (IDs) in lower extremity peak torque assessment. Medline, Embase, CINAHL databases were searched for studies related to psychometric properties in muscle dynamometry. Studies considering standard error of measurement SEM (%) or limit of agreement LOA (%) expressed as percentage of the mean, were considered to establish absolute reliability while studies using intra-class correlation coefficient (ICC) were considered to establish concurrent validity between dynamometers. In total, 17 studies were included in the meta-analysis. The COSMIN checklist classified them between fair and poor. Using HHDs, knee extension LOA (%) was 33.59%, 95% confidence interval (CI) 23.91 to 43.26 and ankle plantar flexion LOA (%) was 48.87%, CI 35.19 to 62.56. Using IDs, Hip adduction and extension; knee flexion and extension; and ankle dorsiflexion showed LOA (%) under 15%. Lower Hip, knee, and ankle LOA (%) were obtained using an ID compared to HHD. ICC between devices ranged between 0.62, CI (0.37 to 0.87) for ankle dorsiflexion to 0.94, IC (0.91to 0.98) for Hip adduction. Very high correlation were found for Hip adductors and Hip Flexors and moderate correlations for knee Flexors/extensors and ankle plantar/dorsiFlexors.
Carlos De La Fuente - One of the best experts on this subject based on the ideXlab platform.
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absolute reliability and concurrent validity of hand held dynamometry and isokinetic dynamometry in the Hip knee and ankle joint systematic review and meta analysis
Open Medicine, 2017Co-Authors: Claudio Chamorro, Susan Armijoolivo, Carlos De La Fuente, J Fuentes, Luis Javier ChirosaAbstract:The purpose of the study is to establish absolute reliability and concurrent validity between hand-held dynamometers (HHDs) and isokinetic dynamometers (IDs) in lower extremity peak torque assessment. Medline, Embase, CINAHL databases were searched for studies related to psychometric properties in muscle dynamometry. Studies considering standard error of measurement SEM (%) or limit of agreement LOA (%) expressed as percentage of the mean, were considered to establish absolute reliability while studies using intra-class correlation coefficient (ICC) were considered to establish concurrent validity between dynamometers. In total, 17 studies were included in the meta-analysis. The COSMIN checklist classified them between fair and poor. Using HHDs, knee extension LOA (%) was 33.59%, 95% confidence interval (CI) 23.91 to 43.26 and ankle plantar flexion LOA (%) was 48.87%, CI 35.19 to 62.56. Using IDs, Hip adduction and extension; knee flexion and extension; and ankle dorsiflexion showed LOA (%) under 15%. Lower Hip, knee, and ankle LOA (%) were obtained using an ID compared to HHD. ICC between devices ranged between 0.62, CI (0.37 to 0.87) for ankle dorsiflexion to 0.94, IC (0.91to 0.98) for Hip adduction. Very high correlation were found for Hip adductors and Hip Flexors and moderate correlations for knee Flexors/extensors and ankle plantar/dorsiFlexors.