Morphofunctional parameters of the thyroid gland in late periods after prolonged stress in rat strains selected for nervous system excitability

: Thyroid morphology, function, and hormonal levels were studied in two rat strains with genetically determined levels of nervous system excitability immediately and in late periods after prolonged stress resulting in development of a neurosis-like state. A high resistance of the linear characteristics of thyroid morphology and function was revealed whose high functional activity was observed in the rats with a low excitability threshold. Two weeks after neurotization cessation morphofunctional status of the thyroid normalized.