Articular disk of the temporomandibular joint
|Articular disk of the temporomandibular joint|
Sagittal section of the articulation of the mandible (articular disk visible at center)
|Latin||Discus articularis articulationis temporomandibularis|
Its upper surface is concavo-convex from before backward, to accommodate itself to the form of the mandibular fossa and the articular tubercle.
Its under surface, in contact with the condyle, is concave.
Its circumference is connected to the articular capsule; and in front to the tendon of the Pterygoideus externus.
It is thicker at its periphery, especially behind, than at its center.
The fibers of which it is composed have a concentric arrangement, more apparent at the circumference than at the center.
It divides the joint into two cavities, each of which is furnished with a synovial membrane.
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