Summary
Antifacilitation and facilitation of synaptic transmission between cell 6 and the large cells were studied in the spiny lobster cardiac ganglion. Two-impulse experiments invariably produced antifacilitation in the second large-cell PSP at all inter-pulse intervals (10 msec to 10 sec) (Fig. 2). When conditioning trains with 2–4 impulses preceded the test impulse, the test PSP was antifacilitated at intervals of less than 100 msec and usually facilitated at intervals greater than 100 msec (Fig. 3). At intervals shorter than 50 msec the test PSP amplitude was nearly independent of the number of conditioning impulses. At greater intervals, the test PSP amplitude was a linear function of the number of impulses in the conditioning train (Fig. 4 and 5). A model was constructed based on the assumption thatF (defined asV T /V 0, whereV 0 andV T are the control and test PSP amplitudes, respectively) is the sum of antifacilitation (F −) and facilitation (F +) (Fig. 9).F − depends only on the separation between the last conditioning impulse and the test impulse and is described by the equation:\(F^ - = 1.0 - A_1 e^{{{ - t} \mathord{\left/ {\vphantom {{ - t} {\tau _1 }}} \right. \kern-\nulldelimiterspace} {\tau _1 }}} - A_2 e^{{{ - t} \mathord{\left/ {\vphantom {{ - t} {\tau _2 }}} \right. \kern-\nulldelimiterspace} {\tau _2 }}} \), wheret is the conditioning-to-test interval in seconds,A 1=0.26,A 2=0.74,τ 1=0.02 sec, andτ 2=4.1 sec.F + is described by the equationN C \((1 - e^{{{ - t} \mathord{\left/ {\vphantom {{ - t} {\tau _4 }}} \right. \kern-\nulldelimiterspace} {\tau _4 }}} )^2 \cdot e^{{{ - t} \mathord{\left/ {\vphantom {{ - t} {\tau _3 }}} \right. \kern-\nulldelimiterspace} {\tau _3 }}} \), whereN is the number of conditioning impulses,t is the interval between the end of the conditioning train and the test impulses,τ 3=3.6 sec,τ 4=0.08 sec, andC is a constant.
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References
Anderson, M., Cooke, I.: Neural activation of the heart of the lobsterHomarus americanus. J. exp. Biol.55, 449–468 (1971)
Atwood, H. L., Lang, F.: Differential responses of crab neuromuscular synapses to cesium ion. J. gen. Physiol.61, 747–766 (1973)
Betz, W. J.: Depression of transmitter release at the neuromuscular junction of the frog. J. Physiol. (Lond.)206, 629–644 (1970)
Bittner, G.: Differentiation of nerve terminals in the crayfish opener muscle and its functional significance. J. gen. Physiol.51, 731–758 (1968)
Braun, M., Schmidt, R. F., Zimmerman, M.: Facilitation at the frog neuromuscular junction during and after repetitive stimulation. Pflügers Arch. ges. Physiol.287, 41–55 (1966)
Bullock, T. H.: Neuromuscular facilitation in scyphomedusae. J. cell. comp. Physiol.22, 251–272 (1943)
Christensen, B. N., Martin, A. R.: Estimates of probability of transmitter release at the mammalian neuromuscular junction. J. Physiol. (Lond.)210, 933–945 (1970)
Curtis, D. R., Eccles, J. C.: Synaptic action during and after repetitive stimulation. J. Physiol. (Lond.)150, 374–398 (1960)
Del Castillo, J., Katz, B.: Statistical factors involved in neuromuscular facilitation and depression. J. Physiol. (Lond.)124, 574–585 (1954)
Dudel, J.: Potential changes in the crayfish motor nerve terminal during repetitive stimulation. Pflügers Arch. ges. Physiol.282, 323–337 (1965)
Dudel, J., Kuffler, S. W.: Mechanism of facilitation at the crayfish neuromuscular junction. J. Physiol. (Lond.)155, 530–542 (1961)
Elmqvist, D., Quastel, D. M.: A quantitative study of end-plate potentials in isolated human muscle. J. Physiol. (Lond.)178, 505–529 (1965)
Frank, E.: Matching of facilitation at the neuromuscular junction of the lobster: a possible case for the influence of muscle on nerve. J. Physiol. (Lond.)233, 635–658 (1973)
Friesen, W. O.: Physiology of the spiny lobster cardiac ganglion. Thesis in Neurosciences Department, University of California, San Diego (1974)
Friesen, W. O.: Synaptic interactions in the cardiac ganglion of the spiny lobsterPanulirus interruptus. J. comp. Physiol.101, 191–205 (1975)
Hagiwara, S., Bullock, T. H.: Intracellular potentials in pacemaker and integrative neurons of the lobster cardiac ganglion. J. cell. comp. Physiol.50, 25–47 (1957)
Hagiwara, S., Watanabe, A., Saito, N.: Potential changes in syncytial neurons of lobster cardiac ganglion. J. Neurophysiol.22, 554–572 (1959)
Hubbard, J. I.: Repetitive stimulation at the neuromuscular junction and mobilization of transmitter. J. Physiol. (Lond.)169, 641–662 (1963)
Hubbard, J. I.: Microphysiology of vertebrate neuromuscular transmission. Physiol. Rev.53, 674–723 (1973)
Lang, F., Atwood, H. L.: Crustacean neuromuscular mechanisms: functional morphology of nerve terminals and the mechanism of facilitation. Amer. Zool.13, 337–355 (1973)
Liley, A. W.: The quantal components of the mammalian end-plate potential. J. Physiol. (Lond.)133, 571–587 (1956)
Liley, A. W., North, K.: An electrical investigation of the effects of repetitive stimulation on mammalian neuromuscular junction. J. Neurophysiol.16, 509–527 (1953)
Linder, T.: Calcium and facilitation at two classes of crustacean neuromuscular synapses. J. gen. Physiol.61, 56–73 (1973).
Livengood, D., Kusano, K.: Evidence for an electrogenic sodium pump in follower cells of the lobster cardiac ganglion. J. Neurophysiol.35, 170–186 (1972)
Maeno, T.: Analysis of mobilization and demobilization processes in neuromuscular transmission in the frog. J. Neurophysiol.32, 793–800 (1969)
Magleby, K. L.: The effect of repetitive stimulation on facilitation of transmitter release at the frog neuromuscular junction. J. Physiol. (Lond.)234, 327–352 (1973a)
Magleby, K. L.: The effect of tetanic and post-tetanic potentiation on facilitation of transmitter release at the frog neuromuscular junction. J. Physiol. (Lond.)234, 353–371 (1973b)
Mallart, A., Martin, A. R.: An analysis of facilitation of transmitter release at the neuromuscular junction of the frog. J. Physiol. (Lond.)193, 679–694 (1967)
Mallart, A., Martin, A. R.: The relation between quantum content and facilitation at the neuromuscular junction of the frog. J. Physiol. (Lond.)196, 593–604 (1968)
Martin, A. R.: A further study of the statistical composition of the end-plate potential. J. Physiol. (Lond.)130, 114–122 (1955)
Martin, A. R., Pilar, G.: Pre-synaptic and post-synaptic events during post-tetanic potentiation and facilitation in the avian ciliary ganglion. J. Physiol. (Lond.)175, 17–30 (1964)
Pantin, C. F. A.: The nerve net of the actinozoa. I. Facilitation. J. exp. Biol.12, 119–138 (1935)
Takeuchi, A.: The long-lasting depression in neuromuscular transmission of frog. Jap. J. Physiol.8, 102–113 (1958)
Takeuchi, A., Takeuchi, N.: Electrical changes in pre- and postsynaptic axons of the giant synapse ofLoligo. J. gen. Physiol.45, 1181–1193 (1962)
Tazaki, K.: Small synaptic potentials in burst activity of large neurons in the lobster cardiac ganglion. Jap. J. Physiol.21, 645–658 (1971)
Terzuolo, C., Bullock, T. H.: Acceleration and inhibition in crustacean ganglion cells. Arch. ital. Biol.96, 117–134 (1958)
Thies, R. E.: Neuromuscular depression and the apparent depletion of transmitter in mammalian muscle. J. Neurophysiol.28, 427–442 (1965)
Wernig, A.: Changes in statistical parameters during facilitation at the crayfish neuromuscular junction. J. Physiol. (Lond.)226, 751–759 (1972)
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Friesen, W.O. Antifacilitation and facilitation in the cardiac ganglion of the spiny lobsterPanulirus interruptus . J. Comp. Physiol. 101, 207–224 (1975). https://doi.org/10.1007/BF00657182
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DOI: https://doi.org/10.1007/BF00657182