myotonia

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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.
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