This article is about trauma and emotional dysregulation:

http://drarielleschwartz.com/polyvagal-theory-unlocks-symptoms-of-ptsd-dr-arielle-schwartz/#.WauF6dOGNsM

It's not specific to bpd, but I know a lot of us on the forum have experienced childhood abuse and this article describes a widely accepted theory on how emotional dysregulation develops from that experience.