Temporal hampering of thyroid hormone synthesis just before hatching impeded the filial imprinting in domestic chicks

ABSTRACT: Thyroid hormones play a critical role in the initiation of the sensitive period of filial imprinting. The amount of thyroid hormones in the brains of chicks increases intrinsically during the late embryonic stages and peaks immediately before hatching. After hatching, a rapid imprinting-dependent inflow of circulating thyroid hormones into the brain occurs via vascular endothelial cells during imprinting training. In our previous study, inhibition of hormonal inflow impeded imprinting, indicating that the learning-dependent inflow of thyroid hormones after hatching is critical for the acquisition of imprinting. However, it remained unclear whether the intrinsic thyroid hormone level just before hatching affects imprinting. Here, we examined the effect of temporal thyroid hormone decrease o

SUBMITTER: Serizawa S 

PROVIDER: S-EPMC9978523 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature