[4] The hypothalamus is a distinct part of the brain that is made up of neurons and its main purpose is to maintain homeostasis.
[citation needed] Estrogens, together, make up a group of primary female sex hormones synthesized in the ovaries.
Hyperthyroidism and hypothyroidism are the two major dysfunctions associated to behavioral and brain chemistry changes due to the imbalances in the thyroid hormones, triiodothyronine (T3) and thyroxine (T4).
The invention of radioimmunoassay techniques revolutionized behavioral endocrinology, allowing scientists to see and quantify hormones.
The field historically resists reductionist thinking and focuses on the physiological aspects of behavior.