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《ACTA BIOPHYSICA SINICA》 2000-02
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THE EFFECT OF NONTHERMAL MICROWAVE AND RELEASE POINTS ON THE RAT'S SPACE LEARNING IN A WATER MAZE

WANG Bao-ming(Tianjin Medical University, Tianjin 300070)  
Four groups of rats: pulsed microwave-exposed, continuous microwave-exposed (CW), sham-exposed (Sham) and cage control (CC),were trained in a circular water maze(Morris) to locate a submerged platform from four different orientated release points for six sessions. By use of their average escape time and speed as measuring parameters the rat's space learning and memory ability were studied. Pulsed rats were exposed to pulsed 2450 MHz microwave(pulse width 2μsec, 500 pulses per sec, power density 2mW/cm2, average whole body specific absorption rate,1.2W/kg) and CW rats to continuous 2450 MHz microwave (power density 2mW/cm2,average whole body specific absorption rate, 1.2w/kg) for 45 min in a circular wave-guide system immediately before each training session. It has been found that there exist much different effect of lehavior among the groups depending on the rat's treatment and release points. Data showed that microwave-exposed rats were slower than Sham and CC control rats. The difference between rat's response curves suggests that rats used their own strategy in learning the location of the platform. The exposure to pulsed microwave caused a more defieiency in spatial “reference” memory in rats and displayed a stronger electromagnetic “windows” effect in response curves than the exposure to CW microwave did.
【CateGory Index】: Q684
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