Static magnetic field expose enhances neurotransmission in crayfish nervous system

Purpose: To investigate the effects of static magnetic field (SMF) exposure on the synaptic transmission in a tail-flip circuit of crayfish. Materials and methods: An O-shaped permanent magnet (35 mT intensity) was placed under the isolated nerve cord of crayfish to provide static magnetic field exp...

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Bibliographic Details
Published in:International journal of radiation biology 2008-01, Vol.84 (7), p.561-567
Main Authors: Yeh, S. R., Yang, J. W., Lee, Y. T., Tsai, L. Y.
Format: Article
Language:English
Subjects:
Animals
Astacoidea
Calcium - metabolism
Calcium - radiation effects
Calcium Channel Blockers - pharmacology
Cambaridae
Chelating Agents - pharmacology
crayfish
Electromagnetic Fields
Electrophysiology
excitatory postsynaptic potential
ions
Nervous System - drug effects
Nervous System - metabolism
Nervous System - radiation effects
Space life sciences
Static magnetic field
synaptic transmission
Synaptic Transmission - drug effects
Synaptic Transmission - physiology
Synaptic Transmission - radiation effects
Time Factors
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Summary:Purpose: To investigate the effects of static magnetic field (SMF) exposure on the synaptic transmission in a tail-flip circuit of crayfish. Materials and methods: An O-shaped permanent magnet (35 mT intensity) was placed under the isolated nerve cord of crayfish to provide static magnetic field exposure. Using electrophysiological methods, the excitatory post synaptic potential (EPSP) before and after field exposure in the lateral giant interneuron were measured and compared. Results: The EPSP produced via electrical and chemical synapses in the lateral giant neuron were enhanced after 30 min of SMF exposure (8.08 mT). Perfusion of field-exposed crayfish bath solution or preloading of Ca2+ chelator and intracellular Ca2+ release blocker failed to observe the SMF-induced enhancement on EPSP. Conclusions: Exposure of SMF increases the efficacy of synaptic-transmission in crayfish tail-flip escape circuit and this SMF-induced potentiation is a Ca2+ dependent phenomenon.
ISSN:0955-3002
1362-3095
DOI:10.1080/09553000802203622