caa a22 4500 477082408 CHVBK 20180405111453.0 cr unu---uuuuu 170330e19960601xx s 000 0 eng 10.1007/BF01969733 doi (NATIONALLICENCE)springer-10.1007/BF01969733 Yamagishi H. Institute of Biological Sciences, University of Tsukuba, 305, Tsukuba, Ibaraki, (Japan) aut Endogenous oscillatory activity and TTX-sensitive spikes of the heart muscle in early juveniles of the isopod crustacean Ligia exotica [Elektronische Daten] [H. Yamagishi] The heart beat of early juveniles of the littoral isopodLigia exotica occurred at a frequency of 250 to 350/min, associated with rhythmic activity of the heart muscle. Each burst was composed of a slow depolarizing potential with superimposed spike potentials. The spike potential was eliminated by perfusion with TTX-containing or Na+-free saline. In TTX-saline, the slow potential was unchanged in frequency and amplitude. By current injection into the heart muscle, the rhythm of the slow potential was phase-shifted and its frequency was changed in a membrane potential-dependent manner. These results show that the heart ofLigia early juveniles acts as an endogenous muscle oscillator generating oscillatory slow potentials and Na+-dependent spikes. Birkhäuser Verlag, 1996 Crustacea nationallicence heart nationallicence muscle nationallicence oscillator nationallicence tetrodotoxin nationallicence Experientia Birkhäuser-Verlag 52/6(1996-06-01), 583-586 0014-4754 52:6<583 1996 52 18 https://doi.org/10.1007/BF01969733 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01969733 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Yamagishi H. Institute of Biological Sciences, University of Tsukuba, 305, Tsukuba, Ibaraki, (Japan) aut NATIONALLICENCE 773 0- Experientia Birkhäuser-Verlag 52/6(1996-06-01), 583-586 0014-4754 52:6<583 1996 52 18 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer