Iowa State University Veterinarian Records, RS 22/6/0/9, University Archives, Special Collections Department, Iowa State University, http://www.add.lib.iastate.edu/spcl/arch/rgrp/22-6-0-9.html
The position and structure of the atlas with relation to the brain stem and spinal cord is such that its injury may readily produce symptoms of a severe central nervous disorder.
Bartelt, L. E.
"Fractured Atlas in a Horse,"
Iowa State University Veterinarian: Vol. 7
, Article 10.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol7/iss2/10