Which structures contribute to the TMJ joint structure?

The correct answer highlights the key components that form the structure of the temporomandibular joint (TMJ). The TMJ is primarily composed of the mandibular condyle, which forms the moving part of the joint, the articular eminence, which provides a socket-like structure for the condyle to articulate, and the articular disc, which acts as a cushion and allows for smooth movement during jaw opening and closing.

Together, these components are essential for the proper functioning of the TMJ. The mandibular condyle engages with the articular eminence to facilitate movement, while the articular disc helps absorb shock and maintain the joint's stability during various activities such as chewing and speaking. This anatomical arrangement allows for the complex movements of the jaw, including flexion, extension, and side-to-side motion.

Other options may mention components related to the TMJ but do not represent the complete or primary structure of the joint. For instance, while the zygomatic arch plays a role in craniofacial structure, it does not directly contribute to the TMJ’s articulating surfaces.