Abstract: A method and apparatus for performing myofunctional therapy by way of biofeedback comprising a plurality of electrodes disposed along a patient's upper jaw, each connected to a detector circuit. An externally applied low voltage signal is selectively passed to respective ones of the detector circuits when the corresponding electrode is contacted by the tongue, whereby the detector circuit illuminates an associated light-emitting diode indicating such contact. In addition, a differential mode discriminating circuit is connected to selected facial muscles to register the electrical activity therein, again providing illuminated display if the muscular electrical levels are above a selected threshold.