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Iodine deficiency causes gradual enlargement of the thyroid gland, referred to as a goiter. Poor length growth is apparent as early as the first year of life. Adult stature without treatment ranges from 100 to 160 cm (3 ft 3 in to 5 ft 3 in), depending on severity, sex, and other genetic factors.
Hypothyroidism (also called underactive thyroid, low thyroid or hypothyreosis) is a disorder of the endocrine system in which the thyroid gland does not produce enough thyroid hormones. [3] It can cause a number of symptoms, such as poor ability to tolerate cold , extreme fatigue, muscle aches , constipation , slow heart rate , depression , and ...
Most children born with congenital hypothyroidism and correctly treated with thyroxine grow and develop normally in all respects. Even most of those with athyreosis and undetectable T 4 levels at birth develop with normal intelligence, although as a population academic performance tends to be below that of siblings and mild learning problems ...
Broda Otto Barnes (14 April 1906 – 1 November 1988) was an American physician and professor of medicine who studied endocrine dysfunction, particularly hypothyroidism. [4] [5] In the 1970s, Barnes published several books arguing that hypothyroidism was underdiagnosed in the U.S. and was responsible for a wide range of health problems.
The severity of these symptoms are determined by the period of hypothyroidism and the degree of deficiency of thyroid hormones. [10] It may also include macroglossia. [11] EMG is either normal or may show myopathic low amplitude and short duration motor unit action potentials (MUAPS). [12] The enzymes creatine kinase is elevated usually.
It is used to measure the time it takes from the start of a daytime nap period to the first signs of sleep, called sleep latency. Subjects undergo a series of five 20-minute sleeping opportunities with an absence of alerting factors at 2-hour intervals on one day.
Many of the signs imitate symptoms of other diseases, so thyroiditis can sometimes be difficult to diagnose. Common hypothyroid symptoms manifest when thyroid cell damage is slow and chronic, and may include fatigue, weight gain, feeling "fuzzy headed", depression, dry skin, and constipation. Other, rarer symptoms include swelling of the legs ...
Euthyroidism: Normal thyroid function; Hypothyroidism: Reduced thyroid function primary hypothyroidism: Feedback loop interrupted by low thyroid secretory capacity, e.g. after thyroid surgery or in case of autoimmune thyroiditis; secondary hypothyroidism: Feedback loop interrupted on the level of pituitary, e.g. in anterior pituitary failure