Two articles and a presentation on TED.com contribute to wholesome image of a biofeedback future:
Tricorder is a reference to Star Trek body scanners used by the doctor. This device comes from NASA.
Featured is a $30 hardware interface for a stethoscope that displays an audiogram of a heartbeat. The image is included in the article.
The next level of intuitive interfaces are evolving in open source and wearable. Augmented reality projected during soul searching giving another sense of your being?