tetany

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Related to parathyroid tetany, parathyroprival tetany: hypoparathyroidism

tetany

 [tet´ah-ne]
1. continuous tonic spasm of a muscle; steady contraction of a muscle without distinct twitching.
2. a syndrome manifested by sharp flexion of the wrist and ankle joints (carpopedal spasm), muscle twitchings, cramps, and convulsions, sometimes with attacks of stridor. It is due to abnormal calcium metabolism, and occurs with hypofunction of the parathyroid glands, vitamin D deficiency, and alkalosis, and also as a result of ingestion of alkaline salts. Treatment varies according to the cause and is usually successful. It may include the administration of vitamin D, calcium, parathyroid hormone, or other remedies. In chronic cases, as in the loss of the parathyroid glands, treatment may have to be continued indefinitely.
duration tetany a continuous tetanic contraction in response to a strong continuous current, occurring especially in degenerated muscles.
gastric tetany a severe form due to disease of the stomach, attended by difficult respiration and painful tonic spasms of the limbs.
hyperventilation tetany tetany produced by forced inhalation and exhalation continued for a considerable time.
latent tetany tetany elicited by the application of electrical and mechanical stimulation.
parathyroid tetany (parathyroprival tetany) tetany due to removal or hypofunctioning of the parathyroid glands.

tet·a·ny

(tet'ă-nē), Do not confuse this word with tetanus.
A clinical neurologic syndrome characterized by muscle twitches, cramps, and carpopedal spasm, and when severe, laryngospasm and seizures; these findings reflect irritability of the central and peripheral nervous systems, usually resulting from low serum levels of ionized calcium or, less commonly, magnesium. Causes include hyperventilation, hypoparathyroidism, rickets, and uremia.
[G. tetanos, tetanus]

tetany

/tet·a·ny/ (-ne) a syndrome of sharp flexion of the wrist and ankle joints (carpopedal spasm), muscle twitching, cramps, and convulsions, sometimes with attacks of stridor; due to hyperexcitability of nerves and muscles caused by decreased extracellular ionized calcium in parathyroid hypofunction, vitamin D deficiency, or alkalosis, or following ingestion of alkaline salts.
duration tetany  a continuous tetanic contraction in response to a strong continuous current, seen especially in degenerated muscles.
gastric tetany  a severe form due to disease of the stomach, with difficult respiration and painful tonic spasms of limbs.
hyperventilation tetany  tetany produced by forced inhalation and exhalation over a period of time.
latent tetany  tetany elicited by the application of electrical and mechanical stimulation.
neonatal tetany , tetany of newborn hypocalcemic tetany in the first few days of life, often marked by irritability, muscle twitchings, jitteriness, tremors, and convulsions, and less often by laryngospasm and carpopedal spasm.
parathyroid tetany , parathyroprival tetany tetany due to removal or hypofunction of the parathyroids.

tetany

(tĕt′n-ē)
n. pl. teta·nies
An abnormal condition characterized by periodic painful muscular spasms and tremors, caused by faulty calcium metabolism and associated with diminished function of the parathyroid glands.

tetany

[tet′ənē]
Etymology: Gk, tetanos, extreme tension
a condition characterized by cramps, convulsions, twitching of the muscles, and sharp flexion of the wrist and ankle joints. These symptoms are sometimes accompanied by attacks of stridor. Tetany is a manifestation of an abnormality in calcium metabolism, which can occur in association with vitamin D deficiency, hypoparathyroidism, alkalosis, or the ingestion of alkaline salts. Kinds of tetany are duration tetany, gastric tetany, hyperventilation tetany, and hypocalcemic tetany.

tetany

Neurology Neuromuscular hyperexcitability evoked by an extreme drop in extracellular calcium Etiology Alkalosis, parathyroid hypofunction, vitamin D deficiency Clinical Carpal, laryngeal, pedal spasms, cramping, stridor, hyperreflexia, choreiform movement. Cf Tetanus.

tet·a·ny

(tet'ă-nē)
A clinical neurologic syndrome characterized by muscle twitches, cramps, and carpopedal spasm, and when severe, laryngospasm and seizures; these findings reflect irritability of the central and peripheral nervous systems, usually resulting from low serum levels of ionized calcium or, rarely, magnesium. Causes include hyperventilation, hypoparathyroidism, rickets, and uremia.
Synonym(s): intermittent cramp (1) , intermittent tetanus.
[G. tetanos, tetanus]

tetany

Muscle spasm resulting from abnormally low levels of blood calcium. Low extracellular calcium on excitable cell membranes opens sodium channels leading to increased excitability. The drop in serum calcium can result from a reduction in blood acidity from deliberate or hysterical over-breathing (hyperventilation) or from underaction of the PARATHYROID GLANDS. Tetany affects mainly the hands and feet, causing a claw-like effect with extension of the nearer joints and bending of the outer joints (carpopedal spasm). Compare TETANUS.

tetany

an abnormal increase in nerve and muscle excitability resulting in spasms of the arms and legs, caused by a deficiency of PARATHYROID secretion.

Tetany

A disorder of the nervous system characterized by muscle cramps, spasms of the arms and legs, and numbness of the extremities.
Mentioned in: Electrolyte Disorders

tetany

condition of muscular hyperexcitability in which mild stimuli produce cramps and muscle spasms in the hands and feet (carpopedal spasm). It is due to a reduction in ionized calcium levels in the blood, for example as a result of hypoparathyroidism, or in healthy people as a result of alkalosis from alkali ingestion or hyperventilation (which may be seen in sport).

tetany

hyperreactivity of sensory/motor nerve fibres to mechanical stimuli, causing muscular cramps and pains, fibrillary tremors and twitches, paraesthesiae, carpopedal spasm and sometimes stridor and/or convulsions; occurring in calcium deficiency, hypoparathyroidism, respiratory alkalosis (hyperventilation) and some intestinal disorders

tetany (te·tenˑ·ē),

n a disorder consisting of muscle cramping and twitching.

tet·a·ny

(tet'ă-nē)
Clinical neurologic syndrome characterized by muscle twitches, cramps, and carpopedal spasm, and when severe, laryngospasm and seizures. Causes include hyperventilation, hypoparathyroidism, rickets, and uremia.
[G. tetanos, tetanus]

tetany,

n a disorder characterized by hyperreflexia, muscle spasms and cramps, foot and ankle spasms, choreiform convulsions, and sometimes stridor. It is due to the malfunction of calcium metabolism. Possible causes are vitamin D deficiency, the ingestion of alkaline salts, hyperthyroidism, or alkalosis. There are many types of tetany.
tetany, hyperventilation
n the neuromuscular irritability and tonic carpopedal muscle spasm resulting from the alkalosis that may be caused by forced respiration over an extended time.

tetany

continuous tonic spasm of a muscle; steady contraction of a muscle without distinct twitching. It is manifested clinically by rigidity of limbs, pricking of ears, flaring of nostrils. In extreme tetany as in tetanus, the rigidity is lead-pipe in nature in that the resistance to bending is constant. In less severe tetany, e.g. an upper motor neuron lesion, there is resistance at first but as soon as this is overcome the limb flexes easily.

grass tetany
hyperventilation tetany
tetany produced by forced inspiration and expiration continued for a considerable time.
hypocalcemic tetany
see puerperal tetany (below).
hypomagnesemic tetany
see calf hypomagnesemic tetany, lactation tetany (2).
lactation tetany
latent tetany
tetany elicited by the application of electrical and mechanical stimulation.
magnesium-deficiency tetany
a product of experimental nutrition but see also lactation tetany.
milk tetany
see calf hypomagnesemic tetany.
parathyroid tetany, parathyroprival tetany
tetany due to removal or hypofunctioning of the parathyroid glands.
tetany pastures
lush grass or cereal crop pastures, in the early spring when they have grown rapidly and their magnesium content is low. The weather is also inclined to be inclement with a high wind-chill factor and there is little or no shelter for the recently calved cows.
puerperal tetany
a syndrome of hypocalcemia in bitches, usually of small breeds, typically 2 to 3 weeks after whelping, caused by the loss of extracellular calcium in lactation. Affected bitchs show restlessness, panting and severe muscular spasms, all of which are relieved by the administration of intravenous calcium. Also occurs infrequently in queens. Called also lactational or puerperal tetany.
recurrent tetany
see Scottie cramp.
transit tetany
of cows, see transit tetany; of mares, see lactation tetany.