MYOCLONUS OF THE TONGUE MUSCLES IN A DOG

A 2.5-year-old male Chocolate Labrador Retriever was evaluated for sei zures, facial twitching; and rhythmic contractions of the tongue. Tong ue contractions remained persistent when the dog was anesthetized, con sistent with myoclonus. Computerized tomography imaging of the cranial vault was normal and a lymphocytic pleocytosis was found upon cerebel lomedullary cerebrospinal fluid analysis. Cerebrospinal fluid and seru m titers were positive for canine distemper virus antibody. Cerebrospi nal fluid protein electrophoresis evaluation indicated that the blood- brain barrier was intact suggesting intrathecal production of antibody in response to the presence of the virus.