2011 Anthony B. DeFeo Lecture in Speech-Language Pathology Dr. Turkstra is the fifth speaker in this series that embodies the academic rigor, pervasive creativity, dedication to students, and support of evidence-based treatments for pediatric, adolescent and adult clients. The lectures series has honored Dr. Anthony B. DeFeo, who served the University for over 27 years before he retired in 2009. Dr. DeFeo passed away in 2010. Adolescence is a time of major changes in not only physical appearance but also thinking and behavior. Underlying these changes are significant developments in brain structure and function. Dr. Turkstra is an associate professor at the University of Wisconsin-Madison, where she directs the Cognition and Communication Laboratory. She is known internationally for her research on cognitive-communication disorders in adolescents and adults with traumatic brain injury, and has published numerous articles in this area.