Accession Number : AD0284132

Title :   CHANGE IN IMPEDANCE OF THE NERVE STEM OF A FROG UNDER THE ACTION OFVISIBLE LIGHT,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : KIRZON,M.V. ; MINEYEV,YU.V. ; BURMISTROV,YU.M.

Report Date : 14 AUG 1962

Pagination or Media Count : 1

Abstract : The illumination (incandescent bulb with a spectrum range of 300 to 700 mmk, and a luminosity of 700 meter-candles) of the nerve stem of a frog causes a decrease in the exponent (constant time 1 - 1.3 min) of ohmic composition of impedance (frequency - 10 kilocycles) reaching 0.8 - 3.0% of the initial amount. After switching off the light, resistance gradually increases and reaches a constant level somewhat lower than the initial resistance. The increase in resistance occurs somewhat slower than its decrease. The effect lasts temporarily in the nerve after it has lost stimulation in the 0.7 and 2.0% solution; however, during this occurrence, the pace of the increase in resistance slows down greatly after the light is switched off. Consequently, a persistent increase in electrical conductivity arises during repeated actions, and the reaction to the light against the increase in electrical conductivity is almost absent. The effect cannot be explained completely by the increase in the temperature of the specimen when it is illuminated. It is possible that it is conditioned by the photoconductivity of the structure of the nerve stem which has semiconductor properties. (Author)

Descriptors :   *BIOPHYSICS, *NERVES, ELECTRICAL IMPEDANCE, LABORATORY ANIMALS, LIGHT, PHOTOCONDUCTIVITY, TRANSLATIONS

Distribution Statement : APPROVED FOR PUBLIC RELEASE