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J Korean Neurol Assoc. 1995;13(4):924-932.
- Quantitative Turns/Amplitude Analysis of Interference Pattern in ?Neuromuscular Diseases
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Seung Hyan Kim, M.D., Hyeon Mi Park, M.D., Hee Tae Kim, M.D., Ju Han Kim, M.D., Myung Ho Kim, M.D., Kwang Woo Lee, M.D.
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Department of Neurology, College of Medicine, Hanyang University and Seoul National University
- 전환점 진폭 비를 이용한 근전도 간섭 패턴의 정량적 분석
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김승현, 박현미, 김희태, 김주한, 김명호, 이광우
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한양대학교 신경과, 서울대학교 신경과
- Abstract
- The present study was designed to evaluate the diagnostic efficacy and the clinical usefulness of quantitative analysis of interf erence pattern in differentiating the neuromuscular diseases. To obtain the normal control value, the automatic turns/amplitude analysis of interference pattern in biceps brachii and tibialis anterior muscle was done in 30 healthy normal subjects. The same procedure was performed in 16 patients with myopathy and 14 neuropathy to determine the diagnostic sensitivity of this method.
Original pairs of turns/amplitude data obtained from controls converted into the
logarithmic scale and linear regression equation, were calculated. Boundary of normal
cloud was defined by the + 2 S. D. lines, maximum turn and amplitude. The result
was considered abnormal if two or more turns/amplitude values were outside the zone
normal cloud.
The values of myopathic patients shifted toward the right lower quadrant meaning high
turns and small amplitudes, but those of neuropathic patients shifted toward the left
upper quadrant meaning few turns and large amplitudes. In all subjects of each patient
group, at least two turns/amplitude values were outside the zone of normal cloud. In
addition, the sequential changes of mean turns/amplitude ratio were well correlated with
the disease activity.
These results suggest that this method of automatic turns/amplitude analysis could be
used not only as a supplementary diagnostic tool in differentiating the neuromuscular
disorders, but also a parameter of monitoring the disease activity.
Key Words : Turns/amplitude, Interference Pattern, neuromuscular diseases.
Keywords :
- 초록
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