It has elsewhere been pointed out that these are for the most part immovable, and the mode of formation has been described.

The Tempero-Maxillary Articulation (fig. 348) or joint formed between the lower jaw and the temporal bone is an exception.

Here the condyles on the superior part of the inferior maxilla fit into shallow cavities provided by the squamous temporal bones. The condyles and the cavities are not brought immediately into contact with each other, but are separated by flat pieces of fibro-cartilage moulded on to the opposed surfaces, and having a synovial membrane between them and each of the bones forming the joints.

The bones and cartilages are enclosed in a capsular ligament which, as we have already observed, is lined by a synovial membrane and strengthened by a bundle of fibres on its outer surface.

Fig. 348. - Temporo-Maxillary Articulation.

1. Section through maxillary condyle. 2. Inter-articular fibro-cartilage.

3. Posterior portion of capsular ligament. 4. Anterior portion of capsular ligament.