Journal of the Japan Veterinary Medical Association
Online ISSN : 2186-0211
Print ISSN : 0446-6454
ISSN-L : 0446-6454
The Japanese Society of Farm Animal Veterinary Medicine
Atlanto-Occipital Fusion in a Holstein Cow
Yoko SUTO
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2009 Volume 62 Issue 2 Pages 132-134

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Abstract

Atlanto-occipital fusion was found in a three-year-old Holstein cow that died of heart failure. The atlas had a large,vertebral body, fused with a basal part of the occipital bone. No occipital condyle was not recognized. In the atlanto-axial joint, no dens was observed in the axis. From these findings, it was considered that the vertebral body remained in the atlas due to a failure to divide at the dens. This is a rare instance for an adult cow.

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© 2009 Japan Veterinary Medical Association
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