In addition, since isometric exercises are done in a static position, they won't help improve speed or athletic performance. They can be useful, however, in enhancing stabilization â maintaining the position of the affected area â since muscles often contract isometrically to aid in stabilization.
Etiology. Most (85-95%) substernal thyroid masses represent benign goiter. Historically, goiters have generally occurred because of iodine deficiency, although this is now observed primarily in developing nations.
The thyroid gland is one of the body's most important endocrine organs. It is located in the neck just below the thyroid cartilage (Adam's apple) and cricoid cartilage. Although its size can vary, based on each individual's size and iodine intake, the thyroid generally weighs approximately 15-20 grams (1/2 - 3/4 oz).he veins draining the thyroid gland tend to run along with the arteries. An additional major vein draining directly into the internal jugular vein is the middle thyroid vein. (Figure 1) The lymphatic drainage from the thyroid gland is to lymph nodes located near the trachea and esophagus.