The TMJ (temporomandibular joints) are located in front of each ear. These joints connect the lower jaw to the skull. The muscles controlling the joints are attached to the lower jaw and work together to provide the jaw with the three main movements; vertical, horizontal and forward and back.
These are the only joints in the human body that work together as a unit, making it very complicated. To keep these motions working smoothly, a soft tissue disc lies between to absorb the shock to the joint from chewing and other movements. When the working unit cannot function as normal, we encounter some issues. This is known as TMJ disorder.