| Popis: |
CHAPUT, R. L., AND BARRON, E. L. Postirradiation Performance of Miniature Pigs as Modified by Tasks. Radiat. Res. 53, 392-401 (1973). The postirradiation performance of miniature pigs trained to work a shuttlebox problem was compared to that of miniature pigs trained to work a visual discrimination problem. The pigs were whole-body exposed to a gamma ray field produced by a nuclear reactor operated in the pulse mode (incident neutron to gamma ratio of 0.06) and received midline tissue doses to the brain of 1200-3300 rads. The major difference in performance occurred during the first 30 minutes after irradiation. At the doses used in this study, discrimination-trained pigs experienced a more severe and prolonged period of early temporary performance decrement than did the shuttlebox-trained pigs. The ED60 or 50 percentile midbrain dose for early performance decrement was calculated to be 1870 and 2380 rads for the discrimination-trained and shuttlebox-trained pigs, respectively. |
