Quantitative relations between avoidance behavior and pituitary-adrenal cortical activity.
The rate at which monkeys pressed a lever and avoided shocks was manipulated in several ways. Measurements were also made of their plasma levels of 17-hydroxycorticosteroids. The rate at which the animals pressed the lever and the frequency with which they received shocks were both implicated as determiners of the steroid levels.
Adrenal Cortex↗