CHANGE IN IMPEDANCE OF THE NERVE STEM OF A FROG UNDER THE ACTION OFVISIBLE LIGHT,
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 14, 1962
- Accession Number
- AD0284132
Entities
People
- M.v. Kirzon
- Yu.m. Burmistrov
- Yu.v. Mineyev
Organizations
- National Air and Space Intelligence Center