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myotonia |
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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 (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. |
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