Looks like a slight sideways S shape in just that section. starting at the base shown and going up.. I wonder if there is curving lower down too?
Definitely looks squished down to me.

Have you ever tried upper cervical adjustment by expert chiro?
Upper cervical only adjusts the top 2 verts and is very gentle, you hardly know anything happened.
www.upcspine.com
www.nucca.com
http://www.spine-health.com/doctor/find-a-chiropractor