A study out of the University of Buffalo explores the use of Narrative Exposure Therapy to treat youth PTSD and substance abuse. âTrauma is like a book on a shelf full of memories that a person has no control over in terms of when or how it is experienced,â says Volpe, PhD, assistant professor in the UB School of Nursing. âNarrative exposure therapy helps reestablish the link between memories that were destroyed by trauma, allowing people to have more control over the book.â