title: Familial undulatory nystagmus in Ayrshire bulls in Finland.
abstract: The article describes a familial, undulatory nystagmus in Finnish Ayrshire bulls. The nystagmus appeared as a high-frequency tremor with a small amplitude and it was similar in both eyes. The vision didn't seem to be affected. In three of the affected five bulls a slight paramyoclonia posterior ('stretches') was also noticed. A histological examination of the vestibular nuclei with the adjacent brain area revealed no abnormalities. The pedigree of the bulls suggests a recessive autosomal inheritance.
mesh_terms: D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000175:diagnosis / Q000235:genetics*; D005387:Finland; D008297:Male; D009759:Nystagmus, Pathologic / Q000175:diagnosis / Q000235:genetics / Q000662:veterinary*; D010375:Pedigree