myotonia

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

(mī′ə-tō′nē-ə)

n.

Tonic spasm or temporary rigidity of one or more muscles, often characteristic of various muscular disorders.

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my′o·ton′ic (-tŏn′ĭk) adj.

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]

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]