the polyvagal theory the polyvagal theory in therapy the polyvagal theory stephen porges the polyvagal theory in therapy engaging the rhythm of regulation the polyvagal theory deb dana the polyvagal theory neurophysiological foundations the polyvagal theory neurophysiological foundations of emotions the polyvagal path to joyful learning the polyvagal theory & daily vagus nerve exercises the polyvagal theory porges