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Myotonia in related Chow Chow dogs

Authors: Barnes GRG, Juby WD, Johnstone AC, Jones BR, Anderson LJ
Publication: New Zealand Veterinary Journal, Volume 25, Issue 8, pp 217-220, Aug 1977
Publisher: Taylor and Francis

Animal type: Companion animal, Dog
Subject Terms: Locomotor, Muscle/myology, Disease/defect, Pathology
Article class: Clinical Communication

Abstract: A myopathy associated with myotonia was observed in three related Chow Chow dogs. The clinical signs were first noticed at 2 to 3 months of age. They included muscle spasm and stiffness of gait which decreased in severity with exercise. Electromyographic findings and the demonstration of a muscle percussion dimple confirmed the presence of myotonia. Dystrophic changes were observed in muscle biopsies but histochemical techniques did not demonstrate fibre type changes. An inherited aetiology was suspected but not confirmed.

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