한국응용과학기술학회지 (Journal of the Korean Applied Science and Technology)

  • 제21권2호
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  • Pages.182-189
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  • 2004
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  • 1225-9098(pISSN)
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  • 2288-1069(eISSN)
한국응용과학기술학회 (The Korean Society of Applied Science and Technology)
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Twitch Stimulation에 의한 Myosin Heads 움직임의 시간분석 연구

A Study on The Time For Movement of Myosin Heads by the Twitch Stimulation

  • 김덕술 (동명정보대학교 컴퓨터공학과) ;
  • 정정수 (동명정보대학교 컴퓨터공학과) ;
  • 박근호 (창원대학교 화공시스템공학과)
  • Kim, Duck-Sool (Department of Computer Engineering Tongmyong University of Information Technology) ;
  • Jung, Jung-Su (Department of Computer Engineering Tongmyong University of Information Technology) ;
  • Park, Keun-Ho (Department of Chemical Engineering, Changwon National University)
  • 발행 : 2004.06.30
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초록

On contraction of the muscles, marked changes in X-ray reflections are observed, suggesting that conformational changes of contractile molecules and the movement of myosin heads during muscle contraction. Time slice requires tension peak after the onset of stimulation and the height of tension peak depends on the number of twitch cycle. The muscles were stimulated by five successive stimuli at an interval of 80 ms started while the tension was still being exerted by the muscles. The intensity of $I_{11}$, $I_{10}$, $143{\AA}$ and $215{\AA}$ reflection measured with 5ms time resolution and is recorded in isometric tension. The peak height of $I_{11}$ and $143{\AA}$ intensity is changed after the onset of a stimulation $I_i$, and the length of twitch is shortened by successive twitches in the case of stimulation $T_i$. On the other hand, the peak height of In and $215{\AA}$ intensity starts to decrease at the 1st twitch and remains constant at low peak height without appreciable recovery during the contraction term. In the case of successive twitch stimulation, the myosin heads of muscle are once moved from their resting position and never returned to their initial position.

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