The Polyvagal theory (gr.'polus', "many" +'vagal', "'vagus nerve'") was proposed and developed by Dr. Stephen Porges, director of the Brain-Body Center at the University of Illinois at Chicago.
The Polyvagal theory (gr.'polus', "many" +'vagal', "'vagus nerve'") describes the multi-faceted components of the tenth cranial nerve. It was introduced in 1994 by Dr. Stephen Porges, director of the Brain-Body Center at the University of Illinois at Chicago.