Introduction: Definition and Historical Context Cretinism, medically and more accurately termed congenital hypothyroidism (CH), represents a severe developmental disorder arising from the insufficient production of thyroid hormones necessary for normal somatic and neurological maturation during prenatal development and infancy. This condition is distinct from adult-onset hypothyroidism primarily because it affects critical periods of brain development, […]
Definition and Chemical Structure Triiodothyronine, commonly abbreviated as T3, is a crucial thyroid hormone that plays an indispensable role in regulating numerous physiological processes throughout the human body. Chemically, T3 is derived from the amino acid tyrosine and contains three atoms of iodine, hence its designation (tri-iodo). While the thyroid gland primarily secretes its precursor, […]
Thyroxine (T4) The Core Definition of Thyroxine (T4) Thyroxine (T4) is a pivotal hormone primarily synthesized and secreted by the thyroid gland, playing an indispensable role in regulating the body’s overall metabolism, growth, and development. It represents the major form of thyroid hormone released into the bloodstream, acting predominantly as a prohormone. While T4 itself […]