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Muscular

This is a Muscular condition.

Myotonia Congenita

What is Myotonia Congenita?

This condition is characterized by prolonged muscle contraction and stiffness that usually resolves with normal exercise, though physical therapy can be beneficial. The genetic basis has been best characterized in the Miniature Schnauzer and the Chow Chow, though it has been reported sporadically in other dog breeds. Affected dogs present as puppies for prolonged muscle contractions, especially after resting. This leads to visibly appreciable muscle rigidity and a stiff, hopping gait. The tongue muscle is often affected as well, causing affected dogs to have a characteristic protruding tongue. Affected dogs may also have difficulty swallowing or may regurgitate their food after eating due to involuntary muscle contractions.

What are the signs & symptoms that develop in affected dogs?

Affected dogs present as puppies for prolonged muscle contractions, especially after resting. This leads to visibly appreciable muscle rigidity and a stiff, hopping gait. The tongue muscle is often affected as well, causing affected dogs to have a characteristic protruding tongue. Affected dogs may also have difficulty swallowing or may regurgitate their food after eating due to involuntary muscle contractions.

When do signs and symptoms develop?

Signs first appear in puppies.

How do vets diagnose this condition?

Genetic testing, clinical signs, EMG, and muscle biopsy can be used to diagnose this disease.

How is this condition treated?

There is no treatment currently for this condition, but physical therapy can be beneficial.

What actions should I take if my dog is affected?

Learning physical therapy techniques from your veterinarian may be beneficial at home.

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