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Turn/amplitude‐analysis in subclinical myogenic lesions
Author(s) -
Finsterer J.,
Mamoli B.
Publication year - 1997
Publication title -
acta neurologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.967
H-Index - 95
eISSN - 1600-0404
pISSN - 0001-6314
DOI - 10.1111/j.1600-0404.1997.tb00237.x
Subject(s) - biceps , subclinical infection , obligate , medicine , cardiology , anatomy , biology , ecology
Objectives ‐ To investigate the accuracy of the turn/amplitude‐analysis (TAA) in the detection of subclinical myogenic lesions, for which Duchenne (DMD) carriers were taken as a model. Materials and methods ‐ Conventional EMG (MUAP analysis) and the TAA with/without force monitoring were applied to the right brachial biceps and femoral rectus muscles of 26 healthy subjects, 11 possible DMD carriers and 5 obligate DMD carriers. Results ‐ Conventional EMG was unspecifically abnormal in 4 possible and 2 obligate DMD carriers, neurogenic in 1 possible DMD carrier and myogenic in none of the DMD carriers. Mean turns/s (T/S), amplitude/turn (A/T) and the ratio (T/S: A/T) were not significantly different between controls and possible or between controls and obligate DMD carriers. With force monitoring, the ratio (T/S:A/T) was myogenic in 1 obligate DMD carrier at 20% of maximum (brachial biceps). One possible DMD carrier showed a neurogenic distribution of the single T/S‐A/T pairs around the normal cloud at 60% of maximum (brachial biceps). Without force monitoring, the TAA was normal in all DMD carriers. Conclusions ‐ TAA is of limited help in demonstrating subclinical myopathy, irrespective of whether it is carried out with or without force monitoring.