What is the function of the isthmus of the thyroid?
The gland is shaped like a butterfly, with “wings,” or lobes, located on each side of the windpipe. These lobes are joined by a bridge of tissue known as the isthmus, which spans across the windpipe. The thyroid makes hormones that travel in the blood to tissues throughout the body.
What is levator Glandulae Thyroideae?
Levator glandulae thyroideae is a fibromuscular band. If it is present, it is usually seen on the left side, to connect the pyramidal lobe of thyroid gland and the hyoid bone. It directly came from upper border of isthmus and went upto hyoid bone. It also had innervation from branches of external laryngeal nerve.
Why is the thyroid gland highly vascularized?
This endocrine gland has a highly vascular blood supply due to its physiologic significance. The superior thyroid artery (STA) arising from the external carotid artery (ECA), and the inferior thyroid artery (ITA) branching from the thyrocervical trunk create the blood supply to the thyroid gland.
What is the role of infrahyoid muscles during swallowing?
Infrahyoid muscles: Together, the infrahyoid muscles play an active role in swallowing through the movement of the larynx. The omohyoid, sternohyoid, and thyrohyoid act to depress the hyoid bone. The thyrohyoid elevates the larynx whereas the sternothyroid depress the larynx.
Which are infrahyoid muscles?
The infrahyoid muscles are a group of four paired muscles that lie inferiorly to the hyoid bone in the anterior aspect of neck. This group of muscles is also known as strap muscles. They connect hyoid, sternum, clavicle and scapula. Infrahyoid muscles are organised in two layers.
What glands are above the thyroid?
Parathyroid glands: The parathyroid glands are in close anatomic relationship to the thyroid gland, sitting on the posterior aspect of the thyroid gland. The parathyroid glands also share arterial supply with the thyroid gland, being supplied by an end-artery, typically the inferior thyroid artery.
Which lymph nodes drain thyroid?
It has been generally accepted that lymphatic drainage occurs from the thyroid primarily to the central lymphatic compartment and secondarily to the lateral compartment nodes.
Is Thyromegaly serious?
It’s possible to have thyromegaly and not even know it. Small goiters that don’t cause problems aren’t a concern at first, but the goiter could grow larger in the future, or start producing too much or too little thyroid hormone. Most causes of thyromegaly are treatable.