myotonia /myo·to·nia/ (mi″o-to´ne-ah) dystonia involving increased muscular irritability and contractility with decreased power of relaxation.myoton´ic
myotonia
myotonia [mi″o-to´ne-ah]
myotonia (mi″oto´ne
),
myotonia
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.
my·o·to·ni·a (m   -t  n -)n. Delayed relaxation of a muscle after an initial contraction. my o·tonic (-t n k) 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 [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.
myotonia (mi″oto´ne
),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
see pseudomyotonia.
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.
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
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