[Effect of chronic stress on the behavior, bodily condition, and cerebral tyrosine hydroxylase activity of "emotional" and "unemotional" rats].

The relationship between behavior manifestations, somatic alterations and brain tyrosine hydroxylase activity was studied in "emotional" and in "non-emotional" rats exposed to chronic stress. The drastic increase in tyrosine hydroxylase activity in the hypothalamus and striatum after stress correlates with disturbances in behavior, somatic defects (ulcers, erosions) in "emotional" rats as compared with "non-emotional" ones.