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본태성 진전 환자의 검지에서의 자세성 진전에 대한 감각자극 효과
이상기,김지원,권유리,이영재,이정환,엄광문,권도영,이찬녕,서유미,김미경,박건우,정호춘,Lee, S.K.,Kim, J.W.,Kwon, Y.R.,Lee, Y.J.,Lee, J.H.,Eom, G.M.,Kwon, D.Y.,Lee, C.N.,Seo, Y.M.,Kim, M.K.,Park, K.W.,Jeong, H.C.,Manto, M. 대한의용생체공학회 2013 의공학회지 Vol.34 No.3
The essential tremor is an involuntary oscillatory movement of body parts. Conventional treatments of essential tremor have little effects in some patients and also leads to significant side effects. Alternative to these treatments, sensory stimulation may have beneficial effects on the essential tremor. The purpose of this study was to analyze an effect of sensory stimulation on essential tremor. Ten patients with essential tremor ($67.4{\pm}8.82$ yrs, 5 men and 5 women) participated in this study. Three-axis gyro sensors were attached on index finger, hand and forearm of patients. Task of 'arms outstretched forward' was performed with and without sensory stimulation. Vectorsum of three dimensional angular velocities (pitch, roll, yaw) was calculated. Outcome measures included root-meansquare (RMS) mean of the vector-sum amplitude, total power, peak power and peak frequency. RMS amplitude, total power and peak power were reduced by sensory stimulation (p < 0.05). Peak frequency was not affected by sensory stimulation. The results indicate that the sensory stimulation is useful to suppress the essential tremor.
본태성 진전 환자의 진전특성에 대한 수행과제 및 부위의 영향
허재훈,김지원,권유리,엄광문,권도영,이찬녕,박건우,Heo, J.H.,Kim, J.W.,Kwon, Y.R.,Eom, Gwang-Moon,Kwon, D.Y.,Lee, C.N.,Park, K.W.,Manto, M. 대한의용생체공학회 2016 의공학회지 Vol.37 No.1
Essential tremor is a neurological disorder with a tremor of the arms and hands. It is well known that essential tremor is characterized by the postural tremor and the action tremor. There has been no report on the quantitative difference in the characteristics of two tremor types. The purpose of this study was to investigate the possible difference in tremor characteristics of postural and action tremors. Seventeen patients with essential tremor ($68.9{\pm}7.9years$, 7 men, 10 women) participated in this study. Patients performed the tasks of postural maintenance (arms outstretched) and daily actions (spiral drawing). Three-axes (pitch, roll and yaw) gyro sensors were attached on index finger, back of hand and forearm, from which the segment and the joint angular velocities were calculated. Outcome measure was the tremor amplitude defined as the root-mean-square mean of the vector-sum angular velocity at segments and joints. Two-way ANOVA showed that task and joint had main factor on the tremor amplitude (p < 0.05). Post-hoc analysis revealed that tremor amplitude at the metacarpo-phalangeal joint was not affected by task (p > 0.05). However, tremor amplitude at the wrist joint differed among the tasks (p < 0.05), and it was greater in the action tasks than in postural task. Tremor was greater at finger segments than at hand and forearm and it increased in action tasks. The results of this study would be helpful for the understanding and task-specific treatments of the essential tremor.