Accession Number : AD0674042

Title :   CHANGES IN THE EXCITABILITY OF A MOTOR REFLEX DURING SUMMATION OF THE EFFECT OF SMALL DOSES OF X-RAYS (IZMENENIYA VOZBUDIMOSTI DVIGATELNOGO REFLEKSA PRI SUMMATSII DEISTVIYA MALYKH DOZ RENTGENOVYKH LUCHEI),

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Kudritskii,Yu. K.

Report Date : 14 DEC 1967

Pagination or Media Count : 10

Abstract : The investigations show that during multiple summation of a dose on the order of 0.05-0.1 r the changes in excitability of a motor reflex after serial irradiation become less and less, until finally they are no longer detected. Consequently, with an increase in the number of multiple exposures and the magnitude of the total dose the changes in the excitability of a motor reflex not only do not increase, but even decrease. At the same time each irradiation, even by such small doses, evidently leaves a trace that changes the reactance of the organism. To elicit such changes, we intravenously injected a solution of urethane in a dose that would not cause changes in the excitability of the motor reflex in the control animals. These tests were conducted on the 115th day (after 96 exposures) in the first group and on the 136th day (after 114 exposures) in the second group. These tests clearly show that multiple x-radiation with doses on the order of 0.05-0.1 r increase the sensitivity of animals to threshold doses of urethane, which indicates a change in the reactance of the organism.

Descriptors :   (*RADIATION EFFECTS, REFLEXES), MOTOR REACTIONS, RADIOBIOLOGY, RADIATION DOSAGE, X RAYS, THRESHOLDS(PHYSIOLOGY), EXPERIMENTAL DATA, USSR

Subject Categories : Radiobiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE