myotonia


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Related to myotonia: myotonia congenita, myotonic dystrophy, myotonia dystrophica

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.

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]

myotonia

/myo·to·nia/ (mi″o-to´ne-ah) dystonia involving increased muscular irritability and contractility with decreased power of relaxation.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 after rest or when they are mechanically stimulated.
myotonia dystro´phica  myotonic dystrophy.

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.

myotonia

[mī′ətō′nē·ə]
Etymology: Gk, mys + tonos, tone
any condition in which a muscle or a group of muscles does not readily relax after contracting. myotonic, adj. Compare amyotonia.

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

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]

myotonia

increased muscular irritability (contraction) and decreased relaxation

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]

myotonia (mi″oto´neə),

n a condition in which muscles remain tense or do not quickly relax after contraction.

myotonia

any disorder involving tonic spasm of muscle.

acquired myotonia
myotonia congenita
an inherited muscle stiffness with stilted gait that worsens with excitement is observed from a few months of age in Chow Chows, Labrador retrievers and Irish terriers.
equine myotonia
is manifest with a stiff gait, hypertrophy of the proximal appendicular musculature and percussion of muscle produces sustained contraction. It may be inherited in some Quarter horse lines.
inherited congenital myotonia
a disease of goats, characterized by inability to move quickly. The limbs become rigid due to muscle contraction, but after a few minutes rest the animal is able to move normally. It is similar to myotonia congenita in humans.
References in periodicals archive ?
We speculate that Max's and Peter's hand weakness or myotonia made it difficult for them to hold the camera and depress the shutter; in turn, they were unable to problem solve a solution for taking pictures.
Esophageal and pulmonary disturbances in myotonia dystrophica.
With these parameters within normal range, her neuromuscular blockade was not pharmacologically reversed to avoid an anticholinesterase-induced myotonia.
Outside of this pathology in skeletal muscles, this defective enzyme in DM impacts upon other body systems, making the entire clinical picture far more complex than simply myotonia.
Diaphragmatic weakness and associated intercostal myotonia can lead to failure in ventilation.
Propofol has been associated with both local and systemic myotonia (5,18).
These may produce shivering which can precipitate myotonia in the early postoperative period.
Unlike any of the other muscular dystrophies, muscle weakness is accompanied by myotonia, with delayed relaxation of muscles after contraction (9).
The goals of anaesthetic management are: a) avoidance of trigger factors that could induce myotonia such as suxamethonium, cold, tremor, shivering, surgical manipulation and diathermy (13), b) optimization of surgical conditions, c) provision of adequate operative and postoperative analgesia without causing respiratory depression and d) appropriate postoperative monitoring in a high dependency unit.
The myotonias and susceptibility to malignant hyperthermia.
Are myotonias and periodic paralyses associated with susceptibility to malignant hyperthermia?
Defects in channel function can have profound effects on an organism, causing a variety of conditions such as muscle myotonias, infertility, kidney and liver disfunctions, deafness and heart disfunction.