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To investigate the effects of prenatal exposure to 900 MHz electromagnetic fields on the postnatal development of the pyramidal cells of the cornu ammonis.
The cornu ammonis is a part of the hippocampus that involves short-term memory and learning.
Pregnant rats were assigned to a control group (n=3) and an exposure group (n=3). Exposure was performed during the 1-19th gestation day. Four weeks after delivery, randomly selected offspring of the control group (n=6) and the exposure group (n=6) was sacrificed for investigation.
|ばく露時間||continuous during gestation (19 days)|
|ばく露装置の詳細||whole body exposure in 12 cm long plastic tube cages with a diameter of 5.5 cm|
The prenatal 900 MHz exposure significantly reduced the total pyramidal cell number in the cornu ammonis in the offspring. In exposed rats pyramidal cells with dark neurons and shrunken perikaryon were seen at all depths of the cornu ammonis. The physical examination did not show skeletal anomalies or differences in body or brain weight between exposed and control groups.
It was concluded that prenatal exposure to 900 MHz electromagnetic fields plays a critical role in the neuronal formation in the hippocampus.