Myotonia Congenita
Myotonia congenita is a rare inherited muscle disorder causing stiffness and muscle hypertrophy, most often seen in Miniature Schnauzers.
Detailed Description
Myotonia congenita is a chloride channelopathy resulting in delayed muscle relaxation after contraction. Affected dogs show muscle stiffness, hypertrophy, and a characteristic stiff gait. The condition is not progressive and is not life-threatening.
Common Symptoms
- stiff gait
- muscle hypertrophy
- difficulty rising
- smiling facial expression
Management Options
- medication (mexiletine or procainamide)
- environmental adaptation
Frequently Asked Questions
Is myotonia congenita painful?
No, but it causes stiffness.
Can affected dogs live normal lives?
Yes, with some limitations.
Can it be prevented?
Yes, by genetic testing and not breeding carriers.
Condition Details
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Typical Age of Onset
Puppyhood (as early as 2-3 weeks)
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Testing Available
Yes
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Diagnosing Methods
clinical signs; electromyography; genetic testing
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Preventative Measures
genetic testing of breeding dogs
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Related Conditions
muscular dystrophy, hypothyroidism