There are four problems that may occur in individuals with sever disabilities when feeding is taking place. These four problems, chin retraction, tongue retraction, chin thrust, and tongue thrust, all take place in the dental region of the face, and they all involve the muscles of that same region. Each one presents its own difficulties; however, sometimes the may occur simultaneously. The basis for the inner feeding team is the jaw, or chin. It controls and regulates the movements of the other muscles, (including the lips and tongue). The ....