AUTHORS: Yumi Takizawa, Atsushi Fukasawa

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ABSTRACT: This paper presents electrophysical potential generation in noctiluca. Dynamic modelling is composed of three electrical zones and two depletion layers (liquid junctions) induced in cytoplasm. Stimulus-sensitive and voltage-dependent ion channels are settled at the membrane around cytopharynx and tentacle. Equivalent circuits of activity are given by an input forward diode and an output reverse diode with current source to drive output resistance. These diodes correspond to the first and the second depletion layers. Typical potential outputs are featured by pulse and plateau with bipolar (positive and negative) potentials defined by Na+ and Cl− ion channels driven by the first and the second messengers. Outputs of pulse and plateau with positive and negative potentials are realized by this model.

KEYWORDS: Noctiluca, electrophysical activity, depletion layer (liquid junction), Na+ and Cl- ion channels, pulse and plateau with positive and negative potentials, the first and the second messengers, motions of tentacle.

REFERENCES:

[1] Hisada M., Membrane resting and action potentials from a protozoan, Noctiluca scintillans, Journal of cellular physiology, vol. 50, Issue 1, pp. 57-71, Aug. 1957.

[2] Eckert R., Bioelectric Control of Bioluminescence in the Dinoflagellate Noctiluca, Vol. 147, No. 3662, pp. 1140-1142, Mar. 5, 1965.

[3] Oami K., Sibaoka T. and Naitoh Y., Tentacle regulating potentials in Noctiluca miliaris: their generation sites and ionic mechanisms, J. Comp. Physiol. A 162, pp. 179-185, 1988.

[4] Fukasawa A., Takizawa Y., Activity of a Neuron and Formulation of a Neural Group for Synchronization and Signal Processing, Proc. of the Int. Conf. on Neurology, pp.242-247, Kos, Greece, July 2012, “The Best Paper Prize of NEUROLOGY’12” awarded by WSEAS/NAUN.

[5] Fukasawa A. Takizawa Y., Activity of a Neuron and Formulation of a Neural Group for Synchronized Systems, International Journal of Biology and Biomedical Engineering, Issue 2, vol. 6, pp. 149- 156, 2012.

[6] Takizawa Y., Fukasawa A., “Formulation of a Neural System and Modelling of Topographical Mapping in Brain,” Proceedings of the 3rd International Conference on Circuits, Systems, Control, Signals, pp. 59-64, Barcelona, Spain Oct. 17-19, 2012.

[7] Fukasawa A., Takizawa Y., Activity of a Neuron and Formulation of a Neural Group based on Mutual Injection in keeping with system synchronization, Proc. of International conference on Circuit, Systems, Control, Signals (CSCS’12), pp. 53-58, Barcelona, Spain, Oct. 17, 2012.

[8] Castsigeras E., Self-synchronization of networks with a strong kernel of integrate and fire excitatory neurons, WSEAS Transactions on Mathematics, Issue 7, Vol. 12, pp. 786 – 797, July 2013.

[9] Sakurai H., Takeuchi H., Mechanism for nervous system and behavior by endocrine disrupting chemicals – neuroethological and pharmacological analysis by using Paramecium caudatum –, Proc. of the 14th annual meeting of JSEDR, p.364, 2003.

[10] Takizawa Y., Fukasawa A., Takeuchi H.-A., “Electrical Measurement Method of Liquid Zones and Boundaries in Active Neuron,” Proc. of International Conference on Health Science and Biomedical Systems (HSBS '14), pp.11-15, Nov. 22, 2014.

[11] Fukasawa A., Takizawa Y., Activity for a Neuron for Generation of Pulse and Plateau with Positive and Negative Potentials, Proc. of International Conference on Health Science and Biological System (HSBS’15), Invited paper, Malta, Aug. 17, 2015.

[12] Fukasawa A., Takizawa Y., Electrophysical Modelling and Analysis of Activity in Neurons, to be in Proc. of HSBS’16, July 14, 2016.