Influence of Temperature during Electric- and Magnetic-Field-Induced Alterationof Calcium-Ion Release from In vitro Brain Tissue

摘要

A technique based on release of calcium ions from in vitro preparations of avianbrain tissues has been used by several investigators to demonstrate a biological effect of weak electric and magnetic fields. When the tissues have been exposed to ELF-modulated, VHF and UHF fields, enhanced release of calcium ions has resulted. Both inhibition and enhancement in release of calcium ions have been reported. Avian-brain tissues were exposed to 16-Hz sinusoidal electromagnetic fields at 14.1 V(sub rms)/m (in air) and 64 nTrms. During 20-min exposures, as tissue-sample temperature rose by 0.7 to 2.5 C to a temperature of 35, 36, or 37, but not of 38 or 39 C, an enhanced release of ions was observed. When the