[Corticosterone receptor binding by various brain structures in extreme body states]

Studies on receptor binding of 3H-corticosterone in different brain structures of mature Wistar rats after a single x-irradiation at a dose of 12.9 mCoul/kg, short-term vertical vibration, glucocorticoid application, and surgical adrenalectomy showed a high sensitivity of all studied structures to the body level of glucocorticoids. Any of these influences caused redistribution of receptor binding of 3H-corticosterone in all brain structures, with a marked effect in the parietal cortex and mediobasal hypothalamus, which characterized the central mechanisms of regulation of the pituitary-adrenal system under extreme influences.