Is the residence the doctors use "balling up" braxton hicks?

are they the same entity or is the balling up a actuall contraction...for thoese who didnt have balling up...which i have never heard of untill sheet my doctor give my pregnant sister referred to a contraction balling up.. I am writing because I have the contact to a site that may help you find even more information. The join is at:
http://forums.obgyn.net/pregnancy-birth