Overview of Thyroid Function By Glenn D Braunstein, MD, Cedars-Sinai Medical Center Reviewed / Revised Aug 2022 | Modified Sep 2022 View Patient Education Synthesis and Release of Thyroid Hormones Laboratory Testing of Thyroid Function Radioactive Iodine Uptake and Imaging Topic Resources Synthesis of thyroid hormones Results of Thyroid Function... The thyroid gland, located in the anterior neck just below the cricoid cartilage, consists of 2 lobes connected by an isthmus.