myotonia


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.

myotonia

 [mi″o-to´ne-ah]
any disorder involving tonic spasm of muscle. adj., adj myoton´ic.
myotonia atro´phica myotonic dystrophy.
myotonia conge´nita a hereditary disease marked by tonic spasm and rigidity of certain muscles when attempts are made to move them. The stiffness tends to disappear as the muscles are used.
myotonia dystro´phica myotonic dystrophy.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

my·o·to·ni·a

(mī'ō-tō'nē-ă),
Delayed relaxation of a muscle after a strong contraction, or prolonged contraction after mechanical stimulation (as by percussion) or brief electrical stimulation; due to abnormality of the muscle membrane, specifically the ion channels.
[myo- + G. tonos, tension, stretching]
Farlex Partner Medical Dictionary © Farlex 2012

myotonia

(mī′ə-tō′nē-ə)
n.
Tonic spasm or temporary rigidity of one or more muscles, often characteristic of various muscular disorders.

my′o·ton′ic (-tŏn′ĭk) adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

myotonia

Neurology Delayed muscle relaxation after voluntary contraction–action myotonia or mechanical stimulation–percussion myotonia Types Chloride channel-related disorders–eg, myotonia congenita, Thomsen type; protein kinase-related disorders–eg, myotonic dystrophy; sodium channel-related disorders–eg, hyperkalemic periodic paralysis; idiopathic
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

my·o·to·ni·a

(mīō-tōnē-ă)
Delayed relaxation of a muscle after a strong contraction, or prolonged contraction after mechanical stimulation (as by percussion) or brief electrical stimulation; due to abnormality of the muscle membrane, specifically the ion channels.
[myo- + G. tonos, tension, stretching]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

my·o·to·ni·a

(mīō-tōnē-ă)
Delayed relaxation of a muscle after a strong contraction, or prolonged contraction after mechanical stimulation (as by percussion) or brief electrical stimulation; due to abnormality of muscle membrane, specifically ion channels.
[myo- + G. tonos, tension, stretching]
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
The Myotonias and Susceptibility to Malignant Hyperthermia Anesth Analg 2009; 109: 1054-64.
Multidisciplinary approach to the treatment of a patient with chondrodystrophic myotonia (Schwartz-Jampel vel Aberfeld syndrome): case report and literature review.
Mutations in CLCN1 gene have been shown to cause congenital myotonia. Here, we demonstrated a new mutation in this gene, which is segregated in a family with several members suffering from congenital myotonia.
Paramyotonia congenita (PC) is a muscular disorder characterized by myotonia, or muscular stiffness, at cold temperatures.
Although myotonia and alterations in gait and behavioral indices were observed following doses of 2,4-D that again exceeded renal clearance mechanisms, alterations in the neurologic system of experimental animals were not observed with the administration of doses in the microgram/kg/day range.
On motor examination, she had normal strength, tone and bulk of muscles and there was no grip myotonia or fatigability.
Myotonic goats are not a specific breed, but share a genetic disorder called myotonia. When a goat with myotonia is frightened by a loud noise, its muscles contract and its legs go stiff.
Myotonic dystrophy involves difficulty-relaxing muscles (myotonia) and, as in other muscular dystrophies, progressive muscle weakness and wasting.
Colchicine use is associated with a variety of neuromuscular complications, including generalized myopathy, painful neuromyopathy, rhabdomyolysis, and, rarely, clinical and electrophysiologic myotonia. (14-17) These complications may occur after months of therapy or be of rapid onset.15,18 Concomitant use of diuretics and the presence of chronic kidney disease, or either, increases the risk of myopathy, whereas concomitant use of an HMG CoA reductase in hibitor (statin) or cyclosporine increases the likelihood of rhabdomyolysis.
The peculiar "Tennessee Wooden Leg" suffers from "hereditary myotonia," a condition that incites its muscles to stiffen when frightened; this can cause the goat to fall over, and is why this bread is sometimes referred to as the "fainting goat." The West African "Pygmy" arrived in America as a by-product of the slave trade and is used almost exclusively for meat production, as is the "Spanish" variety which, in the United States, is bred primarily in Texas.
It works by relaxing both skeletal muscles and vascular smooth muscles, thus demonstrating a variety of effects such as reduction of myotonia, improvement of circulation, and suppression of the pain reflex.