A 40-year-old patient complains of pain in the tragus area, clicking during mouth opening, stuffed ears. Objectively; the face is symmetrical, mouth opening path is straight. Dentition defect can be estimated as the I class by Kennedy; the 18, 17, 16, 26, 27, 28 teeth are absent. In this case the load would be the most traumatizing for the following anatomical structure: