you can model anything you want in MAX, but on medical visualizations, there are companies that did all the research and modeled complicated spines etc alreay and they sell these models. (
http://www.viewpoint.com ,
http://www.turbosquid.com ,
http://www.deespona.com )I know for a fact, that viewpoint has a very detailed selection of human anatomy models, with their parts, already modeled. If the company you are working for, should really look into these models, since they could save you allot of times.
Greg LaClé
VisualAsylum Studios