Here us a site explaining some of it.

http://www.cmtausa.org/index.php?opt...d=10&Itemid=41

Another site for Athena Diagnostics.

http://www.athenadiagnostics.com/content/index.jsp

Another site.

http://www.cmtausa.org/index.php?opt...d=10&Itemid=41

Genetics and Inheritance.

http://www.cmtausa.org/index.php?opt...d=10&Itemid=41

And another site.

http://www.cmtausa.org/index.php?opt...d=10&Itemid=41

You can have flat feet, normal feet, or high arches. It depends on muscles involved. Hands and lower legs and feet involved. Or just your lower legs and feet. Or just your hands. Or finally both. One just doesn't know.