This medical illustration series depicts the anterior displacement of the temporomandibular joint, or TMJ, from the LEFT side. Two illustrations of a lateral (side) view of the skull show the mandible (jaw) open and closed, revealing the displacement of the TMJ meniscus. To the right are two enlarged drawings of the dysfunctional TMJ showing the area in more detail. Structures include the pterygoid muscle, mandible, temporal bone, meniscus, condyle and joint capsule.