Developmental changes in hypothalamus — pituitary — adrenal activity over the transition to adolescence: Normative changes and associations with puberty (cambridge.org)
This area of the brain called hypothalamus senses the environmental conditions and then it sends signals in the form of chemicals to the pituitary gland. (drjockers.com)
When thyroid hormone levels are too low, your brain's hypothalamus releases thyrotropin - releasing hormone (TRH), which stimulates the adjacent pituitary gland to produce thyroid - stimulating hormone (TSH). (KetoDietApp.com)