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T-반사 응답의 분석을 위한 디지탈 신호 처리 시스템의 설계
김재국,권도철 대한의용생체공학회 1996 의공학회지 Vol.17 No.2
Tendon reflex responses generated from mechanical stimulus had been studied for quantitative analysis of activity of tendon reflex, especially patellar tendon reflex responses are known to be a criterion for diagnosing the L3 or L4 radiculopathy. In this paper, we developed a digital signal processing system for analysis of the tendon reflex response. The system parameter, i.e., $\textit{sampling frequency, pre-amplification gain, input channel and filter bank}$ are selected by Using software switches. From the view points of flexibility, the system hardware is connected to an IBM PC for analyzing the tendon reflex parameters, amplitude, latency duration We applied the proposed system to the analysis of the patellar tendon reflex reponses. In the experiment, we measured latency, duration, amplitude of the reflex action potentials generated from vastus medialis, vastus lateralis and rectus femoris that compose quadriceps, and the measured data are analyzed througll the ANOVA test which has 5% significant level. As a result, we showed that the mean amplitude of reflex action potential at the vastus lateralis is larger than any other muscle and the mean latency of the reflex action potential at the rectus femoris is shorter than any other muscle.
송진호,이상혁,김민기,정정명,설상영,이연재,박은택,장윤식,권도철 대한내과학회 1998 대한내과학회지 Vol.54 No.6
Hepatitis C was known to be associated with many autoimmune disease, but the pathophysiology was not well understood, Antiphospholipid antibodies, which are autoantibodies detected to negatively charged phospholipids, are sometimes detected in infectious diseases, including sypilis and autoimmun diseases, such as systemic lupus erythematosus and unknown etiology. A few reports suggested that there is a relation between primary antiphospholipid syndrome and hepatitis C. We recently experienced a case of primary antiphospholipid syndrome with chronic hepatitis C in 20 years old womam who developed cerebral infartion. A brief review of related literature is presented.