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首页> 美国政府科技报告 >Biomedical Effects Associated with Energy-Transmission Systems: Effects of 60-Hz Electric Fields on Circadian and Ultradian Physiological and Behavioral Functions in Small Rodents. Period Covered: January 1, 1980-December 31, 1980
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Biomedical Effects Associated with Energy-Transmission Systems: Effects of 60-Hz Electric Fields on Circadian and Ultradian Physiological and Behavioral Functions in Small Rodents. Period Covered: January 1, 1980-December 31, 1980

机译：与能量传输系统相关的生物医学效应：60Hz电场对小型啮齿动物的昼夜节律和超生理生理和行为功能的影响。涵盖期限：1980年1月1日至1980年12月31日

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The effects of extremely low frequency (ELF) electric fields on transient patterns of circadian rhythms of physiological and behavioral end points are being investigated. This project is developing a data base to determine the exposure conditions that disturb the highly characteristic waveforms of ultradian, circadian, and infradian rhythms. The project has taken the following approach: (1) small rodents are exposed to well-defined ELF horizontal or vertical electric fields at nominal field strengths as high as 100 kV/m in individual residential facilities; (2) exposures follow a variety of schedules ranging from brief (one minute) to continuous, and including variations of circadian periodicities; (3) end points such as metabolism, activity, core body temperature, operant performance, and weight gain are continuously recorded for long intervals by microprocessor-controlled data acquisition systems; (4) the characteristic waveforms are analyzed by several statistical procedures for deviations from their unperturbed ultradian and circadian patterns; and (5) when and if exposures induce distrubances of the patterns, a search for concomitant neurochemical changes will begin. The following conclusions were reached: under a variety of exposure conditions the circadian regulatory system of the rat remained intact; brief ELF exposures at field strengths above 35 kV/m, presented during the inactive phase of the circadian cycle, produced a transient arousal in mice, characterized by increases in motor activity, carbon dioxide production, and oxygen consumption; the transient arousal habituated rapidly; no significant effects were seen in the second, third, or fourth exposure of mice using a one hour on, one hour off protocol; and there were no circadian aftereffects of the intermittent ELF stimulus in mice, based on measuresof rhythms of activity and gas metabolism. (ERA citation 06:030542)

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