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see thyroid glandthyroid gland,
endocrine gland, situated in the neck, that secretes hormones necessary for growth and proper metabolism. It consists of two lobes connected by a narrow segment called the isthmus. The lobes lie on either side of the trachea, the isthmus in front of it.
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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



decreased functioning of the thyroid gland. Hypothyroidism is a mild form of myxedema. Its basic symptoms are fatigue, slowing down of physical and mental activity, somnolence, sluggishness, decreased memory, sensitivity to cold, puffiness of the face, edematous eyelids, dryness of skin, loss of hair, constipation, and lowered basal metabolism. The treatment for hypothyroidism is hormone therapy.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


Condition caused by deficient secretion of the thyroid hormone.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
It never crossed my mind that it could be a thyroid issue, with the symptoms seeming to scream 'menopause' at me, but the doctor sent me for a blood test to check my hormone levels, and it turned out that I had a very underactive thyroid - in fact the level of the hormone in your brain that regulates the thyroid is meant to be under five and mine was over 100!
Other symptoms of underactive thyroid include weight gain, sluggish bowel movements, decreased appetite, falling, incontinence, and increased sensitivity to cold.
People with an underactive thyroid gland produce insufficient amounts of the hormones required for optimal body functioning.
"Light exercise could help, but it's worth getting tests for anaemia or an underactive thyroid gland
"Underactive thyroid is a particularly nasty thing to have and it can lead to other long-term health problems.
The team from the Centre for Health Services Studies at the University of Kent found doctors in the region had recorded 30 per cent higher than expected rates of underactive thyroid.
The abnormally large size of the gland is rarely due to cancer and is usually an indication of hyperthyroidism (an overactive thyroid gland) or hypothyroidism (an underactive thyroid gland).
Common symptoms, similar to an underactive thyroid, are feeling tired, mood swings, weight gain, heart palpations, sweating and lighter periods.
Also available was the TSH (thyroid-stimulating hormone) test for women, which measures thyroid hormone levels and identifies overactive and underactive thyroid glands, which can be the root of various health problems.
It's usual to feel low and lethargic but sometimes WATCH OUT it could indicate an underactive thyroid gland