OSCILLOSCOPIC RECORDING OF MUSCLE FIBER ACTION POTENTIALS . WINDOW TRIGGER AND DELAY UNIT

被引:21
作者
CZEKAJEWSKI, J
EKSTEDT, J
STALBERG, E
机构
[1] Department of Pharmacology, Department of Clinical Neurophysiology, University of Uppsala, Uppsala
[2] Wallenberg Laboratory, University of Uppsala, Uppsala
来源
ELECTROENCEPHALOGRAPHY AND CLINICAL NEUROPHYSIOLOGY | 1969年 / 27卷 / 05期
关键词
D O I
10.1016/0013-4694(69)90195-3
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
This paper deals with some technical problems in connection with the oscilloscopic recording of single muscle fiber action potentials. The action potentials trigger the sweep of the oscilloscope to permit a fast time base and comparison of the shapes of consecutive action potentials. By means of the delay unit it is possible to record on the oscilloscope the part of the action potential appearing up to 500 μsec before the triggering point. With this unit it is also possible to trigger the oscilloscope sweep on the fast positive-negative deflection of the action potential, thereby obtaining a much steadier display than when triggering on the initial positive phase. By means of the window trigger it is possible to record action potentials of any given size. Only action potentials having a positive peak lying within two fixed limits (which can be selected) will trigger the oscilloscope. The counter gate, which allows automatic time interval measurements only of those action potentials that are displayed on the oscilloscope, is finally described. The electronic design of the window trigger. The construction is based on Philips' circuit blocks (two No. B8 950 00 and two No. B8 950 01). © 1969.
引用
收藏
页码:536 / +
页数:1
相关论文
共 3 条
[1]  
EKSTEDT J, 1964, ACTA PHYSIOL SCAND, V61, P1
[2]   A DELAY LINE TO RECORD RANDOM ACTION POTENTIALS [J].
NISSENPETERSEN, H ;
GULD, C ;
BUCHTHAL, F .
ELECTROENCEPHALOGRAPHY AND CLINICAL NEUROPHYSIOLOGY, 1969, 26 (01) :100-+
[3]  
STALBERG E, 1966, ACTA PHYSIOL SCAND, VS 70, P7