latent tetany


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Related to latent tetany: Chvostek's sign

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.

latent tetany

Etymology: L, latere, to be concealed; Gk, tetanos, convulsive tension
a form of tetany that is elicited only by mechanical or electrical stimuli. Symptoms are nonspecific, including generalized weakness and cramping in the hand and foot.

latent tetany

Tetany that requires mechanical or electrical stimulation of nerves to show characteristic signs of excitability; the opposition of manifest tetany.
See also: tetany

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.