For the person with TMJD, however, any or all of these movements.

The Mysterious TMJ(D) Mention "TMJ" to people, and almost to a person everyone either knows someone who has this disorder, or they have it themselves. The temporo mandibular joints are small ball-and-socket hinge like structures on each side of your head that essentially connect your lower jaw to your skull. Despite the millions of people who suffer from TMJD (Temporo Mandibular Jaw Disorder) there is mostly just educated speculation as to the possible causes of this disorder. Even less is certain about its cure. Sixty-eight pairs of muscles in your face and jaw area work to help stabilize this joint so that it moves smoothly to ensure speaking, swallowing, chewing, breathing, and even keeping your head on your shoulders. The surfaces of these bones are covered with cartilage, so rockey is not grinding on bone, and the surfaces are also separated by a small disk which acts as a shock absorber.

The lower jaw has rounded ends (condyles) that smoothly move in and out of this socket when one eats, speaks, yawns, etc.