Myotonia in a cocker spaniel

Journal of the American Animal Hospital Association
S L HillT M Lenehan

Abstract

A 16-week-old, male cocker spaniel suffering from pelvic-limb "bunny hopping" as well as rigidity, spasticity, and ataxia in all limbs was evaluated. The clinical features, electrophysiological abnormalities, and muscle histopathological and histochemical evaluations led to a diagnosis of congenital myotonia. Myotonia is a disorder of skeletal muscle characterized by delayed relaxation of the muscle fiber in response to voluntary, mechanical, or electrical stimulation. The pathophysiology of congenital myotonia remains controversial; currently proposed pathomechanisms are discussed. To the authors' knowledge, this is the first case of congenital myotonia reported in a cocker spaniel.

Citations

Jan 12, 2002·The Veterinary Clinics of North America. Small Animal Practice·Charles H Vite
Jul 23, 1998·The Journal of Small Animal Practice·F H HickfordM R Alley
Dec 23, 1998·Australian Veterinary Journal·G R SwinneyR Malik
May 17, 2011·Journal of the American Veterinary Medical Association·Luis E CisnerosAlexandre S Borges

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