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Hyperfunction

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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Hyperfunction

 

the intensification of the activity (function) of a given organ, tissue, or system. In some cases hyperfunction may be an adaptive reaction to living conditions. (For example, in athletes there may be an increase in the size—hypertrophy—of the cardiac muscle and increase in the strength of its contractions.) In other cases it is a disorder leading to illness of the organism. (For example, hyperthyroidism results from hyperfunction of the thyroid gland—increased production of the hormone thyroxine.)

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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References in periodicals archive
He had limited depression in adduction (-2) in both eyes, but no IO hyperfunction. Double Maddox rod test revealed 20 degrees of extorsion and fundus photography revealed +2 extorsion.
Several etiologies have been suggested to gummy smile, as vertical maxillary excess (1, 4-6, 8, 9), delayed passive eruption (1, 4, 6, 7, 9), hyperfunction of the muscles involved in smiling (1, 6, 7, 9) and reduced length of the clinical crown of the teeth (1-3, 7), which can occur separately or together, and determine the type of treatment to be used.
Neck surface electromyography as a measure of vocal hyperfunction before and after injection laryngoplasty.
Meanwhile, chronic administration of alcohol results in compensatory neuroadaptive changes that generate a state of hyperexcitability in the CNS, which can manifest clinically in withdrawal symptoms and which is due to glutamatergic, noradrenergic and calcium channel hyperfunction as well as GABAergic hypofunction.
The more frequent chronic renal lesion is characterised by the hyperfunction of nephrons remaining after the acute necrotising lesion, which leads to progressive scarring, and not by persistence or recurrence of the micro-angiopathic process.[16]
Any kind of stressor stimulus (physical and/or psychological) can trigger psychophysiological reactions that eventually result in hyperfunction of the central nervous system and the endocrine system.
The hypo and hyperfunction of the thyroid gland influences carbohydrate metabolism at the level of the functional unit of the pancreas: the islet cell, and GLUT governed glucose metabolizing biological cellular targets, posing important therapeutic and diagnostic intricacies.
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