“…For example, conditioning in a taste aversion paradigm is disrupted in rats within 3 days of exposure to proton or 56 Fe radiation at doses of less than 3 Gy (Rabin, Hunt, & Joseph, 1989;Rabin, Hunt, Joseph, Dalton, & Kandasamy, 1991). Fatigue and weakness occur in humans after doses of X rays as low as 1 Gy (Anno, Baum, Withers, & Young, 1989). Disorientation (Anno et al, 1989), and impaired learning and memory (Fields, 1957;Urmer & Brown, 1960) have been shown to occur within a day of exposure to doses of 5-Gy g-or X-irradiation.…”