Stephen W. Porges, Ph.D. is a Distinguished University Scientist at Indiana University where he is the founding director of the Traumatic Stress Research Consortium in the Kinsey Institute. He is Professor of Psychiatry at the University of North Carolina, and Professor Emeritus at both the University of Illinois at Chicago and the University of Maryland. He served as president of the Society for Psychophysiological Research and the Federation of Associations in Behavioral & Brain Sciences and is a former recipient of a National Institute of Mental Health Research Scientist Development Award. He is the originator of the Polyvagal Theory, a theory that emphasizes the importance of physiological state in the expression of behavioral, mental, and health problems related to traumatic experiences. He is the creator of a music-based intervention, the Safe and Sound Protocol ™ , which currently is used by approximately 3,000 therapists to improve spontaneous social engagement, to reduce hearing sensitivities, and to improve language processing, state regulation, and spontaneous social engagement. Dr. Porges is a founder of the Polyvagal Institute.