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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of neurology 216 (1977), S. 235-249 
    ISSN: 1432-1459
    Keywords: Carrier, Duchenne ; Muscular dystrophy, Duchenne type ; EMG quantitative in Duchenne ; Muscle histology in Duchenne
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 13 sichere und 56 mögliche Konduktorinnen einer Duchenne'schen Muskeldystrophie wurden untersucht. Bei sicheren Konduktorinnen wurde mittels CPK-Bestimmung im Serum und manueller quantitativer EMG-Technik eine positive Nachweisrate von 93% erreicht. Bei 64 möglichen Konduktorinnen wurde entweder durch CPK-Bestimmung und quantitative EMG-Untersuchung oder durch CPK-Bestimmung und Muskelbiopsie untersucht. Es wird der Wert der einzelnen Untersuchungstechniken besprochen. Es wird auf die Notwendigkeit hingewiesen, die möglichen Konduktorinnen, die jedoch mittels der durchgeführten Untersuchungen nicht als solche gesichert werden konnten, richtig zu orientieren.
    Notes: Summary Seventy-nine women known as, or suspected to be, carriers of the Duchenne type of muscular dystrophy were examined. The 15 known carriers had an estimation of the CPK serum level and a manual quantitative EMG, which gave the high detection rate of 93%. The 64 suspected carriers had CPK determination and quantitative EMG, or CPK and muscle biopsy, and the value of each technic is discussed. The problem of giving a reassuring answer to women considered to be possible carriers on genetic criteria, but who are not really carriers, is solved if the results of all three tests are negative.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Neurological sciences 21 (2000), S. S971 
    ISSN: 1590-3478
    Keywords: Key words Myotonia ; Myometry ; Quantitative muscle assessment ; Muscle strength ; Clinical trials ; Therapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Severe clinical myotonia can be physically disabling and socially imparing but as yet there is no standardized treatment regimen. The aimn of our study is to present a protocol to measure myotonia using quantitative muscle assessment measures. The proposed protocol addresses two main issues. Muscle strength is assessed in 8 muscles on the right and on the left using a myometer (QMA, quantitative muscle assessment) and by testing strength manually using the 5-point MRC scale (5 = normal) in 15 muscles on the right and on the left. Grip myotonia is assessed by: (a) measuring 1/2 and 3/4 relaxation times (RT) after maximum voluntary contraction (MVC) using QMA apparatus; (b) functional tests (time to open a fist 10 times, time to open and squeeze the eyes 10 times, time to clim 10 steps starting from a seated position, time to protrude the tongue 10 times, time to step onto a chair 10 times; (c) subjective measures of the severity of myotonia using an arbitrary 4-point scale (0=absent, 4=severe); and (d) electromyography (EMG) relaxation times after MVC. Although QMA seems to be a reliable tool to measure myotonia, there are still a number of unsolved issues. Further studies are needed to ensure the ability of QMA to quantify myotonia and to guarantee the reliability of the results for clinical research purposes.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Neurological sciences 21 (2000), S. S953 
    ISSN: 1590-3478
    Keywords: Key words Myotonic disorders ; Muscle channelopathies ; Therapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Myotonia and muscle weakness are cardinal features of myotonic disorders including the myotonic dystrophies and the non-dystrophic myotonias. Despite the recent progress in molecular genetics of these myotonic disorders, the precise mechanisms responsible for myotonia and for permanent or episodic muscle weakness are still unclear. Treatment has been mostly symptomatic, independent of the disease process involved. Moreover, there have been few randomized controlled trials of treatment for myotonic disorders and consequently no standardized treatment regimens are available. We present a review of selected treatment trials in the myotonic disorders and in muscle channelopathies, and discuss, on the basis of our experience in the myotonic disorders, the limits and advantages of treatment trials in this field. Future genotype-phenotype correlations using the patch-clamp technique are also illustrated.
    Type of Medium: Electronic Resource
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