Japanese Psychological Research
Online ISSN : 1468-5884
Print ISSN : 0021-5368
EFFECTS OF FEAR-CONDITIONING AND ELECTRICSHOCK ON ORGANIC NUTRIENT SELECTION IN THE ALBINO RAT
TSUYOSHI SHIGEHISA
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1963 Volume 5 Issue 1 Pages 1-9

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Abstract
Casein, starch, olive oil, cod liver oil and dry yeast were subjected to the selection separately, and the fluctuations in selection were measured every 24 hrs before, during and after the conditioning (or the electric-shock) period. Experiment consisted of 30 days in 6 periods of 5 days. Group 1 was subjected to 10 classical type of conditioning (CS, AC 4V buzzer, 5″; US, AC. 5 mA, 100V shock, . 2″) during 30′ per day for 10 days. Group 2 was presented shock alone. Group 3 was put into the grid box. Group 4 was free from them. In Group 1 and 2, selection of casein increased and of starch decreased markedly during 3rd and 4th, and then 5th and 6th period in all animals, parallelly with the decrease in jumping latency. Selections of other nutrients remained constant during any of the period in 4 groups. It was suggested that the fluctuation in selection is a specific one resulted from the emotional stimulation.
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