GARCIA J, BUCHWALD N A, BACH-Y-RITA G, FEDER B H, KOELLING R A
Science. 1963 Apr 19;140(3564):289-90. doi: 10.1126/science.140.3564.289.
Electroencephalographic recordings made from chronically implanted cortical electrodes indicate that ionizing radiation has an immediate effect upon brain wave patterns. X-rays delivered at the rate of 0.2 roentgen per second produce an arousal effect resembling that which occurs as a result of stimulation through peripheral receptor systems.