Electroencephaloraphic changes in the rabbit during and after fractionated x irradiation
Journal Article
·
· J. Radiat. Res., v. 14, no. 2, pp. 136-143
OSTI ID:4319174
The effects of fractionated x-irradiation on the spontaneous electrical activity in the visual cortex were studied in four adult male rabbits with permanently implanted electrodes. Two of the rabbits received a dose of 300 R and two a dose of 1500 R, fractionated into 50 and 150 R per day administerd at semi-weekly intervals. The head, except for the region of brain, was shielded with a lead plate. The electrical activity was averaged. The obtained averaged electroencephalograms were classified into seven waves: sigma /sub 2/, delta / sub 1/, B, alpha , BETA /sub 1/, BETA /sub 2/, and BETA /sub 3/ by means of an EEG frequency analyzer. The amplitude of the sigma /sub 2/, delta /sub 1/, THETA , alpha , and BB/sub 1/ waves of the two animals irradiated with 1,500 R gradually decreased with increasing doses during fractionated x-irradiation. The decreased value remained relatively constant throughout the observation period after the end of exposure. The two animals irradiated with 300 R did not show any definite changes in amplitude during and after fractionated irradiation. The results are discussed in reference to the findings of the previous study using photic stimulation. (auth)
- Research Organization:
- National Inst. of Radiological Sciences, Chiba, Japan
- NSA Number:
- NSA-29-018630
- OSTI ID:
- 4319174
- Journal Information:
- J. Radiat. Res., v. 14, no. 2, pp. 136-143, Journal Name: J. Radiat. Res., v. 14, no. 2, pp. 136-143; ISSN JRARA
- Country of Publication:
- Japan
- Language:
- English
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